news digest ♦ Lasers
Coleman was cited for his work in semiconductor lasers and photonic materials. His research focuses on materials for optoelectronics – devices that convert electricity into light or vice-versa, such as lasers, light sensors, solar cells and fibre optics. He helped to develop the MOCVD growth method and is director of the Semiconductor Laser Laboratory at the U. of I.
“This is a significant recognition and prestigious honour for one of our distinguished faculty,” said Ilesanmi Adesida, the dean of the College of Engineering. “Dr. Coleman’s research has added considerable knowledge to the field of semiconductor lasers and photonic devices, and his many successful patents and contributions to the engineering literature remain a testament of those achievements. He is also an Illinois alumnus, so we are doubly proud of his achievements.”
Coleman earned his bachelor’s, master’s and doctoral degrees in electrical engineering from the U. of I. He worked at Bell Laboratories and Rockwell International before joining the faculty in 1982. He has published more than 400 scholarly journal articles and holds seven patents. He is a fellow of the Institute of Electrical and Electronics Engineers, the Optical Society of America, SPIE (the international society for optics and photonics), the American Association for the Advancement of Science and the American Physical Society.
NeoPhotonics steps up its tuneable laser production
The NLW-TL lasers, made of III-V compound semiconductors, are critical to high speed 40 and 100 Gbps coherent systems used for metro and long-haul optical networks
The firm has completed the first phase in its plan to significantly increase production capacity of narrow line-width tuneable lasers (NLW-TL) in support of rapidly growing demand.
The company has doubled NLW-TL output since initiating the production plan in the fourth calendar quarter of 2011. Demand for these products has outstripped industry capacity due to the rapid uptake of coherent optical technology coupled with industry supply constraints attributable to the
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www.compoundsemiconductor.net March 2012 flooding in Thailand in 2011.
Narrow Line-width, High Power Integrated Tuneable Laser Assembly
“With the flooding in Thailand, the supply of Narrow Line-width Tuneable Lasers has become a limiting factor in the shipment of 40 and 100 Gbps coherent optical transport systems,” said Tim Jenks, Chairman and CEO of NeoPhotonics.
“Accordingly, we have stepped up our production to help satisfy this critical need. Since we first announced our expansion plans, we have added seven additional customers and are engaged with several more. Our first phase capacity expansion is now full and we are again expanding to help meet industry requirements. We expect the growth in demand for NLW-TLs to continue for the next several years in concert with the rapid adoption of coherent transport technology.”
NeoPhotonics NLW-TLs are compact, widely- tuneable and narrow line-width assemblies with up to 35mW launch power in the C band and 20mW in the L band. Narrow line-widths are designed to facilitate digital signal processing, which is used in coherent optical transmission to analyse the incoming signal when it is mixed with a local oscillator laser in a coherent receiver.
With wavelengths spanning 1528 to 1608nm, the lasers incorporate compound semiconductors.
Coherent transmission is capable of increasing the bandwidth of an optical channel from 10 Gbps to 100Gbps, and is designed to enable carriers to add “backbone” network capacity economically and accommodate the surge of wireline and wireless broadband services hitting the network. The narrow line-width and frequency stability of the NeoPhotonics NLW-TL are enabled by a phase-
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