Optical birefringent 90° hybrid for coherent receiver in free-space optical communication system

Ya'nan Zhi; Yu Zhou; Jianfeng Sun; Aimin Yan; Zhu Luan; Lijuan Wang; Liren Liu

doi:10.1117/12.824680

21 August 2009 Optical birefringent 90° hybrid for coherent receiver in free-space optical communication system

Ya'nan Zhi, Yu Zhou, Jianfeng Sun, Aimin Yan, Zhu Luan, Lijuan Wang, Liren Liu

Proceedings Volume 7464, Free-Space Laser Communications IX; 746410 (2009) https://doi.org/10.1117/12.824680
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The design of an optical birefringent 90° hybrid for coherent receiver in free-space optical communication system is presented. The bulk optical design of 2×4 90° hybrid is a six-port device with two inputs and four outputs. For the balanced receiver configuration two pairs of 180° phase shifted outputs are obtained and one pair has a phase shift of 90° with respect to the other. The optical birefringent 90° hybrid includes two pairs of birefringent plates, an analyser plate and a λ/8 wave plate. The scheme of phase compensation is also presented.

Citation Download Citation

Ya'nan Zhi, Yu Zhou, Jianfeng Sun, Aimin Yan, Zhu Luan, Lijuan Wang, and Liren Liu "Optical birefringent 90° hybrid for coherent receiver in free-space optical communication system", Proc. SPIE 7464, Free-Space Laser Communications IX, 746410 (21 August 2009); https://doi.org/10.1117/12.824680

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