Wide‐angle 2D beam‐steering with Si‐based 16 × (1 × 16) optical phased arrays. Issue 10 (1st May 2020)

• Record Type: Journal Article
• Authors: Yoon, H.; Lee, D.‐S.; Kim, S.‐H.; Kang, G.; Shim, J.; Rhee, H.; Kwon, N.; Kim, J.‐Y.; Park, H.‐H.
• Is Part Of: Electronics letters. Volume 56:Issue 10(2020)
• Page Start: 501
• Page End: 503
• Publication Date: 2020-05-01
• Subjects: diffraction gratings -- optical phase shifters -- beam steering -- optical arrays -- silicon -- elemental semiconductors -- electro‐optical effects -- integrated optics; grating periods -- phase control -- longitudinal radiation angle -- grating radiators -- array pitch -- wide‐angle 2D beam‐steering -- Si‐based 16 × (1 × 16) optical phased arrays -- integrated 1D optical phased arrays -- 1D transversal steering OPA -- p‐i‐n electro‐optic phase shifter array -- transversal‐longitudinal beam‐steering range -- size 2.0 mum -- wavelength 1560.0 nm -- Si; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2019.3490
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : The authors demonstrate integrated 1D optical phased arrays (OPAs) for wide‐angle 2D beam‐steering. The 2D OPA consists of 16 1D transversal steering OPAs whose radiators have different grating periods, to assign different longitudinal angles. The transversal steering of each OPA is performed by the phase control of the p‐i‐n electro‐optic phase shifter array. The 1D transversal steering OPAs operate serially, changing the longitudinal radiation angle. The grating radiators were designed with an array pitch of 2 μm, and a varying period in the range of 610–710 nm. The entire 16 × (1 × 16) OPAs were integrated into a small area of 26.5 mm 2 . The obtained transversal/longitudinal beam‐steering range was 46°/44°, respectively, with a wavelength of 1560 nm, which enables wide 2D beam‐steering.