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Improvement of Inj.ction-Locked VCSELs for Analog and Digital Communication Systems

光学学报 2003年第S1期23卷 369-370页

作者： Chih-Hao chang Lukas Chrostowski connie j. chang-hasnain Department of Electrical Engineering and Computer Science University of California Berkeley CA 94720 USA.Department of Electrical Engineering and Computer Science University of California Berkeley CA 94720 USA.Department of Electrical Engineering and Computer Science University of California Berkeley CA 94720 USA.

VCSEL Inj.ction locking is demonstrated to increase laser bandwidth and reduce non-linearity and chirp. All these properties enhance analog and digital modulation performance.

关键词： for VCSEL SFDR Improvement of Inj.ction-Locked VCSELs for Analog and Digital Communication Systems of

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Addressable structured light system using metasurface optics and an individually addressable VCSEL array

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Photonics Research 2024年第6期12卷 1129-1137页

作者： CHENYANG WU XUANLUN HUANG YIPENG j. TINGYU CHENG j.AXING WANG NAN CHI SHAOHUA YU connie j.chang-hasnain School of Information Science and Technology Fudan UniversityShanghai 200433China Berxel Photonics Co. Ltd.Shenzhen 518071China Peng Cheng Laboratory Shenzhen 518055China Chinese University of Hong Kong Shenzhen 518172China

Structured-light(SL)based 3D sensors have been widely used in many *** SL is the most widely deployed among all SL sensors due to its light weight,compact size,fast video rate,and low *** transmitter(known as the dot proj.ctor)consists of a randomly patterned vertical-cavity surface-emitting laser(VCSEL)array multiplicated by a diffractive optical element(DOE)with a fixed repeated *** that the separation of any two speckles is only one known and fixed number(albeit random),there are no other known scales to cal-ibrate or ***,typical SL sensors require extensive in-factory calibrations,and the depth resolution is limited to 1 mm at-60 cm *** this paper,to the best of our knowledge,we propose a novel dot proj.ctor and a new addressable SL(ASL)3D sensor by using a regularly spaced,individually addressable VCSEL array,multiplicated by a metasurface-DOE(MDOE)into a random pattern of the *** turning on or off the VCSELs in the array provides multiple known distances between neighboring speckles,which is used as a“built-in caliper”to achieve higher accuracy of *** as a precise“vernier caliper,”the addressable VCSEL array enables fine control over speckle positions and high detection *** experimentally dem-onstrated that the proposed method can result in sub-hundred-micron level *** new concept opens new possibilities for applications such as 3D computation,facial recognition,and wearable devices.

关键词： speckle light surface

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Forewords Focus Issue of Nano Optics in Chinese Optics Letters (COL)

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Chinese Optics Letters 2008年第10期6卷 703-703页

作者： connie chang-hasnain T. P. Lee j.hn R. Whinnery Lei Cao Kaiyu Cui Wei Zhang j.angde Peng T. P. Lee j.hn R. Whinnery Lei Cao TsinghuaUniversity

Rapid progress of nanoscience and nanotechnology has made significant impact on many academic disciplines and technical fields recently. In particular,

关键词： COL Forewords Focus Issue of Nano Optics in Chinese Optics Letters

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