2D broadband beamsteering with large-scale MEMS optical phased array
Wu, Ming C.
AffiliationUniv Arizona, Coll Opt Sci
MetadataShow full item record
PublisherOPTICAL SOC AMER
CitationYoumin Wang, Guangya Zhou, Xiaosheng Zhang, Kyungmok Kwon, Pierre-A. Blanche, Nicholas Triesault, Kyoung-sik Yu, and Ming C. Wu, "2D broadband beam steering with large-scale MEMS optical phased array," Optica 6, 557-562 (2019)
RightsCopyright © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractOptical-phased arrays (OPAs) enable complex beamforming, random-access beam pointing, and simultaneous scan and tracking of multiple targets by controlling the phases of two-dimensional (2D) coherent emitters. So far, no OPA can achieve all desirable features including large 2D arrays, high optical efficiency, wideband operation in wavelengths, fast response time, and large steering angles at the same time. Here, we report on a large-scale 2D OPA with novel microelectro-mechanical-system (MEMS)-actuated phase shifters. Wavelength-independent phase shifts are realized by physically moving a grating element in the lateral direction. The OPA has 160 x 160 independent phase shifters across an aperture of 3.1 mm x 3.2 mm. It has a measured beam divergence of 0.042 degrees x 0.031 degrees, a field of view (FOV) of 6.6 degrees x 4.4 degrees, and a response time of 5.7 mu s. It is capable of providing about 25,600 rapidly steerable spots within its FOV. The grating phase shifters are optimized for the near-infrared telecom wavelength bands from 1200 to 1700 nm with 85% optical efficiency. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
NoteOpen access journal
VersionFinal published version
SponsorsBerkeley Sensor and Actuator Center (BSAC); National Science Foundation (NSF) ; Huawei Technologies; Industrial Technology Research Institute (ITRI); Texas Instruments (TI)