LTE -- What Voice Services?    by Jose Deras

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Topics: Main | Metro | Long-Haul | 10 Gbps | 40 Gbps | Components | All Optical Switching | PONs | Start-ups | Contracts | Standards | Videos | Archive   IBM Harnesses "Slow Light" for Optical Communications Researchers at IBM were able to slow light down to less than 1/300th of its usual speed by directing it down a carefully designed channel of perforated silicon called a "photonic crystal waveguide." The photonic crystal waveguide is a thin slab of silicon punctuated by regular arrays of holes that scatter light. The pattern and size of the holes gives the material a very high refractive index -- the higher the refractive index, the slower the light. Heating the waveguide locally with a small electrical current alters the refractive index, allowing the speed of light to be quickly tuned over a large range with very low applied electric power. IBM said the innovation opens the door to the possibility of complex light-based circuits with footprints not much larger than semiconductor circuits. The device was manufactured using a common CMOS processes. The report on this work, "Active control of slow light on a chip with photonic crystal waveguides" by Yurii A. Vlasov, Martin O'Boyle, Hendrik F. Hamann, and Sharee J. McNab of IBM's T.J.Watson Research Center in Yorktown Heights, N.Y. is published in the November 3 issue of Nature. This work was partially supported by the Defense advanced Research Agency (DARPA) through the Defense Sciences Office program "Slowing, Storing and Processing Light". http://domino.research.ibm.com/comm/pr.nsf/pages/news.20051103_photonics.html 03-Nov-05   No video on this topic yet.. contact us to present your views. Recent Optical News Ericsson Expands Packet + Optical Transport Portfolio Broadcom to Acquire Teknovus for EPON Silicon OpNext Delivers Multiplexer for 100G Coherent Transponders Missouri's Fidelity Comm Picks NSN's Metro DWDM FiberTower Buys Capacity from FiberLight Australia's National Broadband Network Selects Alcatel-Lucent for Optical Alcatel-Lucent Debuts Terabit-class Optical Core Transport Switch u²t Photonics Samples 100G Receiver Huawei Introduces IP + Transport Backbone Planning Tool JDSU Launches Optical Test Handhelds GlobeNet to Deploy Huawei's DWDM Platform OFS Launches Hand-Held Core-Alignment Splicer PalmettoNet Deploys Ciena CN 4200 ROADM The OIF to Host Public Workshop on 25-Gig Electrical Interfaces Telefónica Tests Huawei's 100G > More news... Learn How to Get Your Video on this Site   Search  this site   Search the Web   Get Your Column Published LTE -- What Voice Services? by Jose Deras Framing the Next Wave of Carrier Ethernet by Umesh Kukreja Network Interconnection and Evolution for Super Carriers by Dawn M. Hogh Carrier Challenges for Tomorrow's Connected Enterprise by Dr. Badri Nath Dynamic Performance Management for Mobile Data Networks by Michael J. Schabel, Ph.D. To 4G or not to 4G: Supporting Exponential Mobile Traffic Growth by Joe Schraml   E-mail Newsletter Subscribe Now