Multi-phase modulation for nematic liquid crystal on silicon backplane spatial light modulators using pulse-width modulation driving scheme

被引：7
|
作者：
Lee, Y
Gourlay, J
Hossack, WJ
Underwood, I
Walton, AJ
机构：
[1] Univ Edinburgh, Sch Engn & Elect, Inst Integrated Micro & Nano Syst, Scottish Microelect Ctr, Edinburgh EH8 3JF, Midlothian, Scotland
[2] Scottish Microelect Ctr, MicroEmiss Displays Ltd, Edinburgh EH8 3JF, Midlothian, Scotland
[3] Univ Edinburgh, Sch Phys, Edinburgh EH9 2JZ, Midlothian, Scotland
来源：
OPTICS COMMUNICATIONS | 2004年 / 236卷 / 4-6期
关键词：
multi-phase modulation; liquid crystal SLM; LCoS devices;
D O I：
10.1016/j.optcom.2004.03.043
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In phase modulating diffractive optical devices multi-phase modulation provides improved performance over binary modulation. Multi-phase modulation can be achieved by using nematic liquid crystal spatial light modulators (NLCSLM) with pulse-width modulation driven from a binary CMOS backplane. This paper presents the characteristics and the driving scheme of the 512 x 512 Si-backplane SLM for the implementation of the multi-phase modulation while comparing the binary and four-level phase holograms. Diffraction efficiency of 39.7% for binary grating and 72.9% for four-level blazed grating were obtained at the spatial frequency 1.56 lines/mm. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：313 / 322
页数：10
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