Showing posts with label 400ZR. Show all posts
Showing posts with label 400ZR. Show all posts

Sunday, January 24, 2021

Cignal AI: Strong demand for 400ZR pluggables

Global compact modular revenue grew 24 percent in the third quarter of 2020 (3Q20) over the prior year, versus just 7 percent growth for the total optical market, according to the latest Transport Applications Report from market research firm Cignal AI. Cignal AI defines “compact modular” as small form factor optical hardware that is designed for use in open and disaggregated networks.

“Compact modular is gaining popularity with a wider set of network applications and operators due to the continued adoption of disaggregation outside cloud and colocation,” said Scott Wilkinson, lead analyst at Cignal AI. “The market saw extraordinary growth in Asia Pacific over the last two quarters, with sales in the region now approaching those of EMEA.”




Meanwhile, the 400ZR market is getting underway, with several hundred modules shipped for testing and evaluation in 3Q20. “The demand pipeline for 400ZR remains strong and operators are pleased with the prototypes under evaluation,” said Andrew Schmitt, directing analyst at Cignal AI. “Acacia had a huge quarter thanks to a large buildout at Amazon AWS.”

More Key Findings from the 3Q20 Applications Report

  • Although Ciena reported a flat quarter overall for optical sales, its compact modular sales were up 18 percent year over year, and the company maintained its market leadership by a wide margin
  • Compact modular sales in APAC grew by more than 75 percent in the quarter; Huawei (mostly in China), Fujitsu (in Japan) and Nokia all more than doubled their sales in the region
  • Year-over-year sales of packet-OTN equipment grew only in APAC this quarter, and sales in North America declined by more than 25 percent
  • Overall compact modular sales growth is forecast to decelerate to low single digits in 4Q20 as capex budgets evaporate, especially in North America
  • Pluggable coherent optics are projected to account for 40 percent of the high-performance optical market by 2024
  • Shipments of fixed 400 Gbps+ coherent ports jumped 65 percent sequentially, to over 35,000 ports in the quarter
https://cignal.ai/2021/01/compact-modular-grows-faster-than-overall-optical-market-in-3q20/

Sunday, November 15, 2020

Smartoptics introduces new ROADMs for flexible open line systems

Smartoptics introduced its DCP-R family of DWDM ROADMs for flexible open line systems. The ROADMs are designed for use of the new PAM4 and 400ZR traffic formats mixed with legacy protocols, such as Ethernet and Fibre Channel.

The first members of the DCP-R family are the 9-degree DCP-R-9D-MS and the DCP-R-9D-CS where the MS model supports mixed traffic formats and the CS model is optimized for coherent traffic formats. These products will be followed by higher degree ROADMs optimized for regional applications.

The DCP-R-9D is a dedicated 1U per degree ROADM with Flexgrid, directionless, contentionless and colorless capabilities for 9 degrees The ROADM, with integrated mux/demux for local add/drop, is designed for use with PAM4 and 400ZR transceivers mixed with 100G QPSK, 200G 16QAM, Ethernet and Fibre Channel traffic formats.

Magnus Grenfeldt, CEO Smartoptics, commented: “With our DCP-R ROADMs Smartoptics takes yet another step in serving operators wanting to take advantage of disaggregated, open line systems in their optical infrastructure. Thanks to our unique design it is now possible to combine new traffic formats such as PAM4 and 400ZR for extremely high data rates with Ethernet, Fibre Channel and other legacy formats in the same flexible ROADM-based open line system all the way to the edge of the network.”

https://www.smartoptics.com/press-release/smartoptics-announces-the-dcp-r-family-of-roadms-for-flexible-open-line-systems/

Thursday, October 29, 2020

Marvell to acquire Inphi for optical components business


Marvell Technology Group Ltd. agreed to acquire Inphi Corp. in a cash and stock transaction valued at approximately US$10 billion, consisting of $66 in cash and 2.323 shares of stock of the combined company for each Inphi share. Upon closing of the transaction, Marvell shareholders will own approximately 83% of the combined company and Inphi stockholders will own approximately 17% of the combined company.

Inphi’s high-speed electro-optics target data centers as well as wired and wireless carrier networks. The product portfolio includes Inphi transimpedance amplifiers (TIAs); drivers for 100G to 600G coherent optics; optical PHYs for signal recovery, retiming, grooming, error correction and gearbox operations; its COLORZ transceivers based on silicon photonics for 80/120km DWDM connectivity in a QSFP28 form factor; and its Canopus coherent Digital Signal Processors (DSPs)

Marvell said that by combining its storage, networking, processor, and security portfolio with Inphi’s  electro-optics interconnect platform, the combined company will deliver end-to-end technology leadership in data infrastructure. 

“Our acquisition of Inphi will fuel Marvell’s leadership in the cloud and extend our 5G position over the next decade,” said Matt Murphy, president and CEO of Marvell. “Inphi’s technologies are at the heart of cloud data center networks and they continue to extend their leadership with innovative new products, including 400G data center interconnect optical modules, which leverage their unique silicon photonics and DSP technologies. We believe that Inphi’s growing presence with cloud customers will also lead to additional opportunities for Marvell’s DPU and ASIC products.”

“Marvell and Inphi share a vision to enable the world’s data infrastructure and we have both transformed our respective businesses to benefit from the strong secular growth expected in the cloud data center and 5G wireless markets” said Ford Tamer, President and CEO of Inphi. “Combining with Marvell significantly increases our scale, accelerates our access to the next generations of process technology, and opens up new opportunities in 5G connectivity.”

Marvell also stated that intends to reorganize the combined company so that it will be domiciled in the United States, creating a U.S. semiconductor powerhouse with an enterprise value of approximately $40 billion. Upon closing, Ford Tamer, Inphi’s President and CEO, will join Marvell’s Board of Directors.

https://www.marvell.com/announcements/marvell-to-acquire-inphi.html

  • In 2016, Inphi acquired ClariPhy Communications, a provider of ultra-high-speed systems-on-chip (SoCs) for multi-terabit data, long haul and metro networking markets for $275 million in cash as well as the assumption of certain liabilities at the close. ClariPhy was one of the first merchant suppliers of coherent DSP technology. The company was based in Irvine, California.
  • In 2014, Inphi acquired Cortina Systems' High-Speed Interconnect and Optical Transport product lines for $52.5 million in cash and $73.5 million in stock.  In 2006, Cortina Systems acquired the assets of Intel's optical network components business for $115 million. Cortina was based in Sunnyvale, California.

Acacia and Inphi demo interoperability of 400ZR over 120 km

Acacia Communications and Inphi have demonstrated error-free links in 400ZR mode between Inphi’s COLORZ II QSFP-DD and Acacia’s 400ZR QSFP-DD module in Arista switches over a 120 km amplified link using 75GHz channel spacing. “Hyperscale network operators are planning to utilize interoperable 400ZR solutions to support growing bandwidth requirements between data centers,” said Josef Berger, AVP of Marketing, Optical Interconnect at Inphi. “This...

Inphi acquires assets in Vietnam from Arrive Technologies

Inphi has acquired certain assets from Arrive Technologies, located in Ho Chi Minh City, Vietnam. Financial terms were not disclosed.

Arrive Technologies, founded in 2001, has 112 employees with strong design capabilities in embedded software, digital ASIC, post-silicon validation, and FPGA emulation. The team has designed highly complex transport framers and products including pseudowire and circuit emulation functions with domain expertise including, but not limited to, OTN/SONET, FEC, PTP, and Security (IPsec). Arrive had been engaged with many of Inphi’s system OEM customers in the cloud, telecom, and 5G markets. 

Inphi said the addition of these resources will provide Inphi with front-end design, verification, validation and firmware skills that complement Inphi’s existing design teams in Singapore and Vietnam.

Inphi samples 800G 7nm PAM4 DSP

Inphi is sampling its new Spica 800G 7nm PAM4 DSP, the world’s first 800Gbps or 8x100Gbps PAM4 DSP to enable 800G optical transceiver modules in QSFP-DD800 or OSFP form factors.

Inphi's highly integrated Spica 800G platform includes the company's high-performance, low power PAM4 DSPs alongside its companion market-leading low power linear driver and TIAs.

The company said its Spica 800Gbps PAM4 DSP with integrated 56GBaud driver, enables either 2x400Gbps or 8x100Gbps optical modules with 100Gbps per lane electrical interfaces. Applications could include 800Gbps / 8x100Gbps optical interconnects in a compact form factor for single-mode fibers or multimode fibers. The Spica platform could be matched with Inphi’s 112Gbps Capella SerDes IP for next-generation AI processors and switches.

Inphi samples its 3rd gen, single-lambda PAM4

Inphi has begun sampling its Porrima Gen3 Single-Lambda PAM4 platform based on 7nm technology and optimized for hyperscale data center networks. The new design offers an expanded feature set and enhanced direct drive capability, further expanding the breadth of lasers that can be used with the integrated laser driver. The new platform is also designed to reduce total module power consumption to less than 8W for 400Gbps DR4/FR4 mode in the QSFP-DD form factor.

“Porrima Gen3 is another prime example of our ongoing dedication to this market, by increasing investments to exceed customer needs and stay ahead of the competition,” said Eric Hayes, SVP, Networking Interconnect, Inphi. “Not only are we delivering better performance and lower power with this third-generation PAM4 solution, but we are also making it easy for customers to make a smooth transition. This will accelerate adoption of this total solution and maintain our market leadership position.”

Inphi intros its 2nd gen 112Gbps SerDes in 7nm

Inphi released its second-generation, high performance 112Gbps SerDes IP solution in 7nm. Inphi said its new Capella SerDes IP is designed to ensure high performance across the most demanding environments for network connectivity and data transmission. The announcement builds on Inphi’s track record of having shipped over a million 56Gbps and 112Gbps ports to date. “Delivering the next generation of SerDes IP technology is a significant milestone...

NeoPhotonics began sampling its new 400ZR ClearLight OSFP transceiver to a leading cloud -related customer. The new transceiver utilizes NeoPhotonics Silicon Photonics Coherent Optical Subassembly (COSA) and low power consumption, ultra-narrow linewidth Nano-ITLA tunable laser, combined with the latest generation of 7 nm DSP, to provide full 400ZR transmission in a standard data center OSFP form factor. NeoPhotonics said its new 400ZR ClearLight...

Inphi milestone: 100,000 COLORZ silicon photonics PAM4 units shipped

Inphi noted a company milestone -- the shipment of more than 100,000 COLORZ units, its Silicon Photonics PAM4 platform solution for 80km DWDM connectivity in a QSFP28 form factor. Inphi said its unique approach in integrating PAM4 CMOS with silicon photonics enables the platform to achieve a 60% in cost and a 75% in power savings. Accomplishing the COLORZ ramp to 100k within a span of only three years also validates the network inflection point...


Inphi to acquire eSilicon for $226 million

Inphi Corporation agreed to acquire eSilicon for $216 million in both cash and the assumption of debt.

“The Inphi team is excited to enhance our value proposition to our cloud and telecom customers with the addition of the eSilicon team and IP,” said Ford Tamer, president and CEO of Inphi. “eSilicon adds to Inphi world-class 2.5D packaging, SerDes, custom silicon and operations teams. Just as we successfully leveraged our Cortina and Clariphy acquisitions, eSilicon will advance our shared commitments in driving successful customer engagement, industry-leading innovation, and best of class execution.”

Inphi lists the following drivers for the acquisition:

  • Combine Inphi’s DSP, TiA, Driver and SiPho disciplines with eSilicon’s 2.5D packaging and custom silicon design capabilities and accelerate the roadmap for electro-optics, 5nm advanced CMOS process node, and custom DSP solutions
  • Augment Inphi’s existing SerDes team and resources
  • Extend Inphi’s addressable market in Cloud data center networking and Telecom 5G infrastructure with top tier OEM customers
  • Expand Inphi’s presence into new, strategic geographies for talent acquisition with engineering design centers in Italy, Romania, Vietnam, and Spain and operations in Malaysia
  • Add between $80 to $120 million to 2020 revenue, be accretive to 2020 EPS and both the 2021 revenue and EPS growth rates
  • Increase Inphi’s operational scale with suppliers, lowering costs and resulting in financial leverage
  • Result in Inphi paying about 2.2X 2020 revenue in a combination of cash and debt assumption

Tuesday, October 27, 2020

Acacia and Inphi demo interoperability of 400ZR over 120 km


Acacia Communications and Inphi have demonstrated error free links in 400ZR mode between Inphi’s COLORZ II QSFP-DD and Acacia’s 400ZR QSFP-DD module in Arista switches over a 120 km amplified link using 75GHz channel spacing. 

“Hyperscale network operators are planning to utilize interoperable 400ZR solutions to support growing bandwidth requirements between data centers,” said Josef Berger, AVP of Marketing, Optical Interconnect at Inphi. “This testing provides an exciting validation of the 400ZR ecosystem designed to meet the need for high-performance, low power coherent pluggable solutions that support cost-effective DWDM architectures for DCI.”

“The industry has been anticipating the availability of interoperable 400ZR solutions to meet the growing demand for DCI bandwidth, particularly for network operators evolving their data center architectures to 400G Ethernet with optical connections between switches,” said Tom Williams, Vice President of Marketing at Acacia. “These solutions provide data center operators with greater flexibility in the components and suppliers they use to build out their networks.”


NeoPhotonics and Inphi show 400ZR interoperability

Inphi and NeoPhotonics have completed the first interoperability demonstration of OIF 400ZR Implementation Agreement compliant coherent transceivers, operating successfully across the C-Band over 120km of optical fiber. Transceiver pairs consisting of Inphi's COLORZ II QSFP-DD with its Canopus 7nm Coherent DSP and NeoPhotonics 400ZR ClearLight OSFP were successfully linked. Both 400ZR coherent optics transceivers carried error-free traffic over...

OIF publishes 400ZR implementation agreeement

OIF published the Implementation Agreement (IA) for a low-cost, 400ZR coherent optical interface.

OIF launched the 400ZR project in response to requests from large-scale data center operators and their suppliers for an interoperable coherent interface that transports 400 Gigabit Ethernet over longer distances. Traditional network operators also became interested in 400ZR for their metro needs. Based on their different requirements, OIF developed specs and tweaked the channel requirements so the IA would benefit both data center and network operators. While developing the IA, OIF collaborated closely with other standards bodies.

The 400ZR IA addresses two applications:

  • Amplified, point-to-point DWDM links with reaches of 120 km or less
  • Unamplified, single wavelength links with a loss budget of 11dB
The IA aims to enable interoperable, cost-effective, 400Gbps implementations based on single-carrier coherent DP-16QAM modulation, low-power DSPs supporting absolute (Non-Differential) phase encoding/decoding, and a Concatenated FEC (C-FEC) with a post-FEC error floor <1 .0e-15.="" 400gbase-r="" 400zr="" a="" as="" operates="" p="" phy.="">

No restriction on the physical form factor is implied by the IA (QSFP-DD, OSFP, COBO, CFP2, CFP8), but the specifications target a pluggable DCO architecture with port densities equivalent to grey client optics.

Tuesday, July 28, 2020

NeoPhotonics and Inphi show 400ZR interoperability

Inphi and NeoPhotonics have completed the first interoperability demonstration of OIF 400ZR Implementation Agreement compliant coherent transceivers, operating successfully across the C-Band over 120km of optical fiber.

Transceiver pairs consisting of Inphi's COLORZ II QSFP-DD with its Canopus 7nm Coherent DSP and NeoPhotonics 400ZR ClearLight OSFP were successfully linked. Both 400ZR coherent optics transceivers carried error-free traffic over a typical data center interconnect (DCI) link configuration (amplified over 120km of fiber) at several wavelengths across the C-Band using Arista 7060 data center switches.

The successful interoperation of NeoPhotonics and Inphi 400ZR transceivers demonstrates the availability of interoperable coherent transceivers for the 400ZR ecosystem, a key step in enabling the next generation of DCI links. 400ZR pluggable transceiver modules significantly reduce the cost and power consumption of DCIs by eliminating the transport network equipment layer.

“We are very excited about the successful interoperable demonstration with NeoPhotonics to bring pluggable 400G coherent optics into the data center,” said Josef Berger, AVP of Marketing, Optical Interconnect at Inphi. “This demonstration proves the readiness to deliver the flexibility of high bandwidth DWDM connectivity between data centers with the ability to rapidly scale capacity and meet our customers’ demands for standards-based pluggable coherent solutions.”

“NeoPhotonics has worked closely with Inphi to combine their Canopus™ DSP with our high-performance laser and coherent optics into a standards-based ClearLight OSFP and QSFP-DD transceiver modules that can meet the needs of our hyper-scale customers,” said Marc Stiller, Vice President of Coherent Modules for NeoPhotonics. “Supporting the interoperable CFEC standard, as defined by OIF, has been a critical part of our design effort, and we’re very pleased to announce this milestone as we continue to work with customers to implement this game-changing technology.”


OIF publishes 400ZR implementation agreeement

OIF published the Implementation Agreement (IA) for a low-cost, 400ZR coherent optical interface.

OIF launched the 400ZR project in response to requests from large-scale data center operators and their suppliers for an interoperable coherent interface that transports 400 Gigabit Ethernet over longer distances. Traditional network operators also became interested in 400ZR for their metro needs. Based on their different requirements, OIF developed specs and tweaked the channel requirements so the IA would benefit both data center and network operators. While developing the IA, OIF collaborated closely with other standards bodies.

The 400ZR IA addresses two applications:

  • Amplified, point-to-point DWDM links with reaches of 120 km or less
  • Unamplified, single wavelength links with a loss budget of 11dB
The IA aims to enable interoperable, cost-effective, 400Gbps implementations based on single-carrier coherent DP-16QAM modulation, low-power DSPs supporting absolute (Non-Differential) phase encoding/decoding, and a Concatenated FEC (C-FEC) with a post-FEC error floor <1 .0e-15.="" 400gbase-r="" 400zr="" a="" as="" operates="" p="" phy.="">

No restriction on the physical form factor is implied by the IA (QSFP-DD, OSFP, COBO, CFP2, CFP8), but the specifications target a pluggable DCO architecture with port densities equivalent to grey client optics.

NeoPhotonics samples 400ZR OSFP coherent transceiver

NeoPhotonics began sampling its new 400ZR ClearLight OSFP transceiver to a leading cloud -related customer.

The new transceiver utilizes NeoPhotonics Silicon Photonics Coherent Optical Subassembly (COSA) and low power consumption, ultra-narrow linewidth Nano-ITLA tunable laser, combined with the latest generation of 7 nm DSP, to provide full 400ZR transmission in a standard data center OSFP form factor.

NeoPhotonics said its new 400ZR ClearLight OSFP transceiver can be plugged directly into switches and router, simplifying data center interconnect (DCI) networks by eliminating a layer of network equipment and a set of short reach client-side transceivers. The new OSFP module is capable of tuning to 75 GHz or 100GHz spaced wavelength channels, as specified in the OIF agreement, and operates in 400ZR mode for Cloud DCI applications.  For longer metro reaches, the module  is designed to support 400ZR+ modes.

This ClearLight OSFP module can also be optionally provisioned to tune over the entire “Super C-Band”, or up to 6.4 Terahertz, increasing the capacity of an optical fiber by up to 50% over standard implementations.  NeoPhotonics provides arrayed waveguide gratings for multiplexing and de-multiplexing with 75GHz and 100GHz wavelength channel spacings, supporting 85 and 64 channels respectively, with filter responses optimized for high baud rate coherent signals.


Inphi samples first 400ZR QSFP-DD transceiver

Inphi has begun sampling its COLORZ II 400ZR QSFP-DD pluggable coherent transceiver for cloud data center interconnects (DCIs) to major cloud operators and OEMs.

Inphi cites several industry firsts for its COLORZ II 400ZR QSFP-DD:

  • 400G single-chip, coherent Silicon Photonics Integrated Circuit (PIC) that includes all transmit and receive functions 
  • Innovative, low cost, passive alignment of fiber to the PIC that eliminates the complicated active alignment, using traditional optics
  • Low power, high performance, 7nm CMOS-based coherent DSP enabling 400ZR as well as extended reach 100/200/300/400G ZR+ modes
  • Integrated industry standard firmware management interface that enables full performance monitoring previously only available in DCI or transport systems directly from the optical module

 The 400ZR standard promises to lower the cost and power consumption of metro data center interconnect (DCI) by enabling switch and router companies to offer the same density for both coherent DWDM and client optics in the same chassis. This eliminates a layer of network connectivity that was previously required and supports high capacity DWDM connectivity directly from data center switches.

Inphi said its COLORZ II represents a massive increase in switch rack capacity, while reducing the power consumption by as much as 80%. COLORZ II delivers up to 14.4T of capacity per rack unit (RU), compared to 2.4T or 3.6T per RU on competing solutions, representing a 4-6 x increase in throughput per chassis.


Wednesday, July 1, 2020

OIF launches Optical Module Management Interface Survey

The OIF is conducting a survey to determine how the Common Management Interface Specification is viewed by the industry and the level of industry alignment on and support for further standardization of optical module management. The subject of module management encompasses physical interfaces, communication protocols and management applications layers.

The survey is intended to gather industry opinion regarding evolution of optical module management and the increasing consensus that the intrinsic restrictions of throughput and data organization will not scale well into the future.

“The OIF 400ZR specification covers interoperability on the network fiber and also at the host by defining the electrical interface and software management interface,” said Jeffery J. Maki, distinguished engineer II, Juniper Networks and OIF Physical Layer User Group Working Group Chair. “All of this is done to drive a true multi-sourcing opportunity for the module. Beyond 400ZR, support of the software management interface is an area OIF would like to continue to address and seeks, through the use of a survey, to gauge industry interest and the potential solution approach.”

The survey is available now and open to all who can act as a stakeholder and represent their company’s viewpoint – module vendors, system vendors, and network operators. Multiple responses per company are also allowed. Responses will be collated anonymously and then evaluated by a dedicated survey evaluation team.

OIF will hold a public webinar on Thursday, July 30, 2020 at 7am PDT to announce the results of the survey. Visit the survey webpage to download the survey and for information on the survey deadline, where to submit answers and how to register for the webinar.

https://www.oiforum.com/technical-work/optical-module-management-interface-survey/

OIF's Coherent Common Management Interface Spec supports 400ZR

OIF has completed the Coherent Common Management Interface Specification (C-CMIS) Implementation Agreement (IA), which serves as an extension to the CMIS (QSFP-DD/OSFP/COBO) management specification, specifically targeting DCO modules.

“The C-CMIS IA is an important part of the developing 400ZR ecosystem,” said Ian Betty, Ciena and OIF Board Member. “It defines additional management registers, and monitors, together with new functionality, mechanisms, or behaviors, as needed.”

The C-CMIS IA provides register definition for coherent modules in pages and parameters that were previously reserved. Users that have previously implemented software to manage optical modules using CMIS will be able to quickly add support for these coherent pages and parameters. This release, which augments the existing CMIS specification which focused on addressing direct detect client optics, is targeted at the 400ZR application.

The technology and complexity of coherent modules requires additional monitoring parameters for use in field applications. This additional monitoring is primarily focused on Forward Error Correction (FEC) monitoring and optical/analog monitoring including items like Chromatic Dispersion, Differential Group Delay and Electrical Signal to Noise Ratio (eSNR). The C-CMIS IA provides specifications to monitor the standard parameters in a normative manner while taking advantage of the flexibility of the CMIS specification to monitor any additional proprietary parameters.

“The current IA is focused on supporting the OIF 400ZR IA, which supports a single data path with eight-lane host electrical interface for a 400GBASE-R PCS signal and a single-lane 400G coherent media interface (with a new signal format called 400ZR),” explained Betty. “However, we expect future versions to include more complex Metro modules and may even extend these management features to other form factors.”

Thursday, June 18, 2020

NeoPhotonics demos 90 km 400ZR in 75 GHz DWDM channels

NeoPhotonics has demonstrated transmission of 400Gbps data over data center interconnect (DCI) ZR distances in a 75 GHz spaced Dense Wavelength Division Multiplexing (DWDM) channel.

NeoPhotonics said its demonstration achieved two milestones using its interoperable pluggable 400ZR coherent modules and its specially designed athermal arrayed waveguide grating (AWG) multiplexers (MUX) and de-multiplexers (DMUX).

  • First, data rate per channel increases from today’s non-interoperable 100Gbps direct-detect transceivers to 400Gbps interoperable coherent 400ZR modules. 
  • Second, the current DWDM infrastructure can be increased from 32 channels of 100 GHz-spaced DWDM signals to 64 channels of 75 GHz-spaced DWDM signals. The total DCI fiber capacity can thus be increased from 3.2 Tb/s (100Gb/s/ch. x 32 ch.) to 25.6 Tb/s (400Gb/s/ch. x 64 ch.), which is a total capacity increase of 800 percent.

NeoPhotonics technology overcomes multiple challenges to transporting 400ZR signals in 75 GHz-spaced DWDM channels. The 400ZR signal utilizes an approximately 60 Gbaud symbol rate and 16 QAM modulation, resulting in a broader transmitting signal spectrum compared to that of a standard 100 Gb/s coherent or PAM4 signals. Furthermore, it is recognized that the center frequencies of the lasers, MUX and DMUX will all drift due to temperature changes and aging. Consequently, as the channel spacing is reduced from 100GHz to 75GHz, adjacent channel interference (ACI) becomes more critical, and can potentially degrade the optical signal-to-noise ratio of 400ZR signals.

The filters used in NeoPhotonics MUX and DMUX units are designed to limit ACI while at the same time having a stable center frequency against extreme temperatures and aging. The optical signal spectrum of the pluggable 400ZR transmitter is very important for two reasons. First, the spectrum should not be too wide, as that would result in “spillover energy” impacting its neighbor DWDM channels. Second, it also cannot be too narrow, as that would degrade the signal quality or even recoverability, especially after the MUX and DMUX filtering.

NeoPhotonics has demonstrated end-to-end 90km DCI links using three in-house 400ZR pluggable transceivers with their tunable laser frequencies tuned to 75GHz spaced channels, and a pair of passive 75GHz-spaced DWDM MUX and DMUX modules designed specifically for this application. The optical signal-to-noise ratio (OSNR) penalty due to the presence of the MUX and DMUX and the worst-case frequency drifts of the lasers, as well as the MUX and DMUX filters, is less than 1dB. The worst-case component frequency drifts were applied to emulate the operating conditions for aging and extreme temperatures.

“The combination of compact 400ZR silicon photonics-based pluggable coherent transceiver modules with specially designed 75 GHz channel spaced multiplexers and de-multiplexers can greatly increase the bandwidth capacity of optical fibers in a DCI application and consequently greatly decrease the cost per bit,” said Tim Jenks, Chairman and CEO of NeoPhotonics. “These 400ZR coherent techniques pack 400Gbps of data into a 75 GHz wide spectral channel, placing stringent requirements on the multiplexers and de-multiplexers. We are uniquely able to meet these requirements because we do both design and fabrication of planar lightwave circuits and we have 20 years of experience addressing the most challenging MUX/DMUX applications,” concluded Mr. Jenks.

https://www.neophotonics.com/press-releases/?newsId=11856

Wednesday, April 29, 2020

OIF publishes 400ZR implementation agreeement

OIF published the Implementation Agreement (IA) for a low-cost, 400ZR coherent optical interface.

OIF launched the 400ZR project in response to requests from large-scale data center operators and their suppliers for an interoperable coherent interface that transports 400 Gigabit Ethernet over longer distances. Traditional network operators also became interested in 400ZR for their metro needs. Based on their different requirements, OIF developed specs and tweaked the channel requirements so the IA would benefit both data center and network operators. While developing the IA, OIF collaborated closely with other standards bodies.

The 400ZR IA addresses two applications:

  • Amplified, point-to-point DWDM links with reaches of 120 km or less
  • Unamplified, single wavelength links with a loss budget of 11dB


The IA aims to enable interoperable, cost-effective, 400Gbps implementations based on single-carrier coherent DP-16QAM modulation, low-power DSPs supporting absolute (Non-Differential) phase encoding/decoding, and a Concatenated FEC (C-FEC) with a post-FEC error floor <1 .0e-15.="" 400gbase-r="" 400zr="" a="" as="" operates="" p="" phy.="">

No restriction on the physical form factor is implied by the IA (QSFP-DD, OSFP, COBO, CFP2, CFP8), but the specifications target a pluggable DCO architecture with port densities equivalent to grey client optics.

“As a member driven organization, OIF’s work toward the 400ZR IA was the combination of significant interest from network operator members and component supplier members responding to that demand,” said Karl Gass, OIF Physical and Link Layer (PLL) Working Group – Optical Vice Chair. “The 400ZR IA is the culmination of this significant effort by OIF member companies and is critical for managing cost and driving interoperability for the industry.”

“400ZR is a key enabler of Microsoft’s regional architecture for the 400G generation,” said Mark Filer, Principal Optical Engineer in Microsoft Azure. “The creation of a multi-vendor, interoperable coherent interface to meet these needs would not have been possible without the extensive work and cooperation of OIF members and leadership.”

“The 400ZR IA is an example of OIF’s ability to quickly and effectively mobilize opinion and to bring interoperability to a rapidly evolving world,” said Andrew Schmitt, Directing Analyst at Cignal AI. “The 400ZR specification is the organization’s first step to establish broader interoperability among coherent transport interfaces.”

http://www.oiforum.com

II-VI launches pluggable Optical Line Subsystem for 400ZR



II‐VI introduced a pluggable optical line subsystem (POLS) platform to enable the 400ZR coherent transceivesr ecosystem for next-generation datacenter interconnects (DCIs). II-VI’s initial product from the POLS platform is the OSFP-LS, designed in the very compact OSFP form factor, that plugs directly into a datacenter interconnect (DCI) switch port and enables full-duplex multi-channel 400ZR transport, including multiplexing, demultiplexing, and...


Acacia samples 400ZR, OpenZR+, Open ROADM MSA



Acacia Communications has begun sampling multiple variants in its family of 400G pluggable optical transceiver modules, including 400ZR, OpenZR+, and Open ROADM MSA. Volume production is expected in the second half of 2020. Acacia’s 400G pluggable module family features an expansive list of interoperability solutions in QSFP-DD, OSFP and CFP2-DCO pluggable form factors for cloud data center interconnects (DCIs) and service provider networks. The...


OIF's Coherent Common Management Interface Spec supports 400ZR



OIF has completed the Coherent Common Management Interface Specification (C-CMIS) Implementation Agreement (IA), which serves as an extension to the CMIS (QSFP-DD/OSFP/COBO) management specification, specifically targeting DCO modules. “The C-CMIS IA is an important part of the developing 400ZR ecosystem,” said Ian Betty, Ciena and OIF Board Member. “It defines additional management registers, and monitors, together with new functionality, mechanisms,...



NeoPhotonics began sampling its new 400ZR ClearLight OSFP transceiver to a leading cloud -related customer. The new transceiver utilizes NeoPhotonics Silicon Photonics Coherent Optical Subassembly (COSA) and low power consumption, ultra-narrow linewidth Nano-ITLA tunable laser, combined with the latest generation of 7 nm DSP, to provide full 400ZR transmission in a standard data center OSFP form factor. NeoPhotonics said its new 400ZR ClearLight...



Inphi has begun sampling its COLORZ II 400ZR QSFP-DD pluggable coherent transceiver for cloud data center interconnects (DCIs) to major cloud operators and OEMs. Inphi cites several industry firsts for its COLORZ II 400ZR QSFP-DD: 400G single-chip, coherent Silicon Photonics Integrated Circuit (PIC) that includes all transmit and receive functions  Innovative, low cost, passive alignment of fiber to the PIC that eliminates the complicated...