Showing posts with label Laser. Show all posts
Showing posts with label Laser. Show all posts

Sunday, July 12, 2020

MIT's “Light squeezer” reduces quantum noise in lasers

Researchers at MIT have developed a quantum “light squeezer” that reduces quantum noise in an incoming laser beam by 15%.

The portable light squeezer works at room temperature and could be used to improve laser measurements where quantum noise is a limiting factor. The setup is based on a marble-sized optical cavity, housed in a vacuum chamber and containing two mirrors, the first of which is smaller than the diameter of a human hair. The second, larger, nanomechanical mirror, which suspended by a spring-like cantileve, is the key to the system’s ability to work at room temperature.

“The importance of the result is that you can engineer these mechanical systems so that at room temperature, they still can have quantum mechanical properties,” says Nergis Mavalvala, the Marble Professor and associate head of physics at MIT. “That changes the game completely in terms of being able to use these systems, not just in our own labs, housed in large cryogenic refrigerators, but out in the world.”

Tuesday, November 15, 2016

MACOM's 25Gbps Laser Enters Mass Production

MACOM Technology Solutions announced volume production of its family of 25Gbps lasers for data center, mobile infrastructure and Fiber to the home (FTTH) applications.

MACOM leverages Etched Facet Technology (EFT), which, when combined with its in-house wafer scale Indium Phosphide manufacturing, are expected to provide a cost and capacity advantage previously unachievable by incumbent laser suppliers.

The 127/129/131/133D-25G-LCT11 and 1295/1300/1304/1309-25B-LCT11-S families of 25Gbps lasers serve the CWDM and LAN-WDM Data Center applications respectively.
The 131D-25I-LT5TC family of TO packaged 25Gbps laser products service the 5G-LTE and 100G PON applications. MACOM’s TO package is a robust, high-speed package design that enables the full utilization of laser bandwidth with efficient heat dissipation.

“With this industry leading family of lasers, MACOM continues to expand its leadership footprint beyond just RF & microwave and into photonics, and we believe key OEMs have taken notice, viewing us a key strategic supplier providing them all the critical technology and products at the necessary cost and capacity to enable their Cloud Data Center, Mobile and FTTH applications,” said Dr. Alex Behfar, Senior Vice President and Chief Scientist, Photonic Solutions at MACOM. “In markets where EFT can bring disruptive economics to bear, we believe it will play a pivotal role in achieving the cost thresholds to enable mainstream deployment. We have already proven our ability to service high volume cost competitive markets such as PON, and with our 25Gbps laser family we believe we are well positioned to become a preeminent supplier of lasers into these high volume markets.”

Tuesday, July 8, 2014

VI Systems, UCSB and DTU Demo 1060nm VCSEL Link

The first vertical cavity surface emitting laser (VCSEL) at 1060nm has been demonstrated by VI Systems, University of California Santa Barbara and the Technical University of Denmark.  The tests established a data rate of 30 Gbps.

The 1060nm VCSEL light source is a bottom emitting, highly-strained 1060 nm quantum well VCSEL developed by Professor Larry Coldren’s group in the Department of Electrical and Computer Engineering at the University of California, Santa Barbara. The receiver tested was designed for data rates of up to 40 Gbps and included VI Systems’ transimpedance amplifier T40-150C080 packaged in fiber coupled receiver optical subassembly (ROSA).