DocumentCode :
1080043
Title :
Analytic Solution of Free Space Optical Beam Steering Using Risley Prisms
Author :
Yang, Yaguang
Author_Institution :
Orbital Sci. Corp., Dulles, VA
Volume :
26
Issue :
21
fYear :
2008
Firstpage :
3576
Lastpage :
3583
Abstract :
This paper provides some mathematical formulae for Risley beam steer control system that is used for free space optical interconnection system. Given the prisms´ orientations, the analytic formulae can be used to calculate the pointing position. For the inverse problem, i.e., given the desired pointing position, the required prisms´ orientations can be obtained efficiently by applying any numerical method for systems of nonlinear equations related to the formulae. Unlike some existing methods, these formulae are not first-order approximation but an accurate closed analytical form. It does not need a good initial guess on the motor positions required by some other methods. It also does not need a feedback loop to get the correct pointing position but it can be used in feedback implementation. This feature is especially imporutant for systems that need to slew the beam to the desired position quickly and accurately.
Keywords :
beam steering; inverse problems; optical feedback; optical interconnections; optical prisms; Risley beam steer control system; feedback loop; first-order approximation; free space optical interconnection system; inverse problem; nonlinear equations; prisms´ orientations; Beam steering; Control systems; Extraterrestrial measurements; Feedback loop; Inverse problems; Nonlinear equations; Optical beams; Optical control; Optical feedback; Optical interconnections; Beam steering; Risley prisms; optical interconnection;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2008.917323
Filename :
4758646
Link To Document :
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