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Proceedings Paper

Design and fabrication of optical 90° hybrid by birefringent crystals for coherent receiver in free-space optical communication system
Author(s): Ya'nan Zhi; Yu Zhou; Jianfeng Sun; Liren Liu
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Paper Abstract

The design and fabrication of an optical 2×4 90° hybrid based on birefringent crystals for coherent receiver in free-space optical communication system are presented. For the quadrature receiver two pairs of 180° phase shifted 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 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.

Paper Details

Date Published: 24 August 2010
PDF: 8 pages
Proc. SPIE 7814, Free-Space Laser Communications X, 781411 (24 August 2010); doi: 10.1117/12.859981
Show Author Affiliations
Ya'nan Zhi, Shanghai Institute of Optics and Fine Mechanics (China)
Yu Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 7814:
Free-Space Laser Communications X
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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