An Optical 2×4 90° Hybrid Based on a Birefringent Crystal for a Coherent Receiver in a Free-Space Optical Communication System
HOU Pei-Pei, ZHI Ya-Nan**, ZHOU Yu, SUN Jian-Feng, LIU Li-Ren
Key Laboratory of Space Laser Communication and Testing Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
An Optical 2×4 90° Hybrid Based on a Birefringent Crystal for a Coherent Receiver in a Free-Space Optical Communication System
HOU Pei-Pei, ZHI Ya-Nan**, ZHOU Yu, SUN Jian-Feng, LIU Li-Ren
Key Laboratory of Space Laser Communication and Testing Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
摘要The design and fabrication of an optical 2×4 90° hybrid based on birefringent crystals for a coherent receiver in a free−space optical communication system are presented. For the quadrature receiver, two pairs of 180° phase−shift outputs are obtained and one pair has a phase difference of 90° with respect to the other. The 90° hybrid comprises two pairs of stacked birefringent plates, a phase retardation plate and an analyser birefringent plate. The testing results measured by the heterodyne method verify that the 2×4 optical 90° hybrid can work correctly and effectively. The phase compensation and further optimization schemes are also proposed.
Abstract：The design and fabrication of an optical 2×4 90° hybrid based on birefringent crystals for a coherent receiver in a free−space optical communication system are presented. For the quadrature receiver, two pairs of 180° phase−shift outputs are obtained and one pair has a phase difference of 90° with respect to the other. The 90° hybrid comprises two pairs of stacked birefringent plates, a phase retardation plate and an analyser birefringent plate. The testing results measured by the heterodyne method verify that the 2×4 optical 90° hybrid can work correctly and effectively. The phase compensation and further optimization schemes are also proposed.
HOU Pei-Pei;ZHI Ya-Nan**;ZHOU Yu;SUN Jian-Feng;LIU Li-Ren
. An Optical 2×4 90° Hybrid Based on a Birefringent Crystal for a Coherent Receiver in a Free-Space Optical Communication System[J]. 中国物理快报, 2011, 28(7): 74204-074204.
HOU Pei-Pei, ZHI Ya-Nan**, ZHOU Yu, SUN Jian-Feng, LIU Li-Ren
. An Optical 2×4 90° Hybrid Based on a Birefringent Crystal for a Coherent Receiver in a Free-Space Optical Communication System. Chin. Phys. Lett., 2011, 28(7): 74204-074204.
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