Design of single-channel optical rotary joint using bulk optical detector

The insertion loss of a fiber optical rotary joint depends on the mechanical misalignments of the collimating lenses. To achieve 3-dB or less insertion loss, the lateral misalignment of the graded-index (GRIN) lenses should be less than 100 m, and the angular tilt of these lenses is limited to 0.1 d...

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Bibliographic Details
Published in:Optical Engineering 2003-11, Vol.42 (11), p.3285-3289
Main Authors: Jing, Wencai, Zhang, Yi-Mo, Zhou, Ge, Jia, Dagong, Liu, Bao, Tang, Feng
Format: Article
Language:English
Subjects:
fiber optical rotary joint
graded-index lens
insertion loss
mechanical misalignment
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Summary:The insertion loss of a fiber optical rotary joint depends on the mechanical misalignments of the collimating lenses. To achieve 3-dB or less insertion loss, the lateral misalignment of the graded-index (GRIN) lenses should be less than 100 m, and the angular tilt of these lenses is limited to 0.1 deg. These requirements cause a high mechanical fabrication and assembly cost. To solve this problem, we design a single-channel optical rotary joint using a bulk optical detector. The requirement on lateral misalignment is relaxed to 500 m, and the angular tilting is relaxed to 2 deg. Using this method, the cost of the optical rotary joint can be dramatically reduced. ©
ISSN:0091-3286
1560-2303
DOI:10.1117/1.1614809