Premium
77‐5: Late‐News Paper: Advanced phase distribution algorithm in blazed grating for continuous beam steering
Author(s) -
Kim Young,
Won Kanghee,
An Jungkwuen,
Choi Chil-Sung,
Song Hoon,
Kim Yongkyu,
Jeon Myungje,
Kim Sunil,
Seo Wontaek,
Shin Bongsu,
Lee Chang-Kun,
Chung Jae-Seung,
Seo Juwon,
Kim Yun-Tae,
Sung Geeyoung,
Lee Hong-Seok,
Hong Sunghoon
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13124
Subject(s) - materials science , optics , beam steering , grating , beam (structure) , optoelectronics , indium tin oxide , substrate (aquarium) , phase (matter) , transmission (telecommunications) , layer (electronics) , computer science , physics , telecommunications , oceanography , composite material , geology , quantum mechanics
The electrically tunable beam deflector have been researched and developed for lots of purpose. For the transmission type beam deflector, an indium‐tin‐oxide (ITO) has been developed with blazed grating patterns. The ITO layer was designed and generated on the lower substrate for transmission type beam deflector. A pixel pitch of ITO grating patterns is 6um, the electrode width is 3um with 3um spacing. With this small pixel pitch, the maximum diffraction angle is 2.541° at a wavelength of 532nm. A minimum cell gap is 2.5um for the enough 2π phase modulation with high birefringence liquid crystal which is delta n, 0.31. Total 720‐ ITO line which was patterned on the lower substrate is controlled individually by driving integrated circuit (IC) from driving module. Beam deflector driving module with driving IC is designed for continuous beam steering. Driving algorithm is developed and applied to the driving system for high angular resolution and continuous beam steering.