Control of a free-space adaptive optical interconnect using a liquid-crystal spatial light modulator for beam steering

被引：23

作者：

Henderson, CJ

Robertson, B

Leyva, DG

Wilkinson, TD

O'Brien, DC

Faulkner, G

机构：

[1] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

[2] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England

来源：

OPTICAL ENGINEERING | 2005年 / 44卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

adaptive optics; alignment; free-space optical interconnect; computer-generated holograms; spatial light modulators; feedback control;

D O I：

10.1117/1.1948108

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An adaptive beam position control system is reported, for use in alignment correction for free-space parallel optical interconnects at the board-to-board level. A liquid-crystal spatial light modulator (SLM) displaying binary phase gratings is used as a diffractive optical element to steer the beam. The design and implementation of a feedback controller for the SLM are presented, and shown in experimental results to completely correct for step disturbances within 1 to 2 sample periods. Extension of the system to tolerate random vibrations is considered, in terms of both the required SLM technology and the design of the control algorithms. The discussion highlights some of the trade-offs in choosing components when using this technology to correct for different levels of vibration. (c) 2005 Society of Photo-Optical Instrumentation Engineers.

引用

页码：1 / 8

页数：8

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