Optical 90-deg hybrid of birefringent crystals for freely propagating laser beams

Lingyu Wan; Yanan Zhi; Yu Zhou; Liren Liu

doi:10.1117/1.3526334

1 December 2010 Optical 90-deg hybrid of birefringent crystals for freely propagating laser beams

Lingyu Wan, Yanan Zhi, Yu Zhou, Liren Liu

Author Affiliations +

Funded by: National Natural Science Foundation of China, Chinese National Science Foundation

Optical Engineering, Vol. 49, Issue 12, 125004 (December 2010). https://doi.org/10.1117/1.3526334

Abstract

An optical 90-deg hybrid of birefringent crystals for freely propagating laser beams is presented. It consists principally of a quarter-wave plate, two pairs of birefringent crystal plates, and a polarization analyzer. The splitting and recombination of the signal and local-oscillator beams are achieved through the birefringence of the crystals, and a 90-deg phase shift is introduced between orthogonally polarized beam components by use of a quarter-wave plate. The optical hybrid has a self-compensating light path, and its correct function is demonstrated in a self-heterodyne measurement setup.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Lingyu Wan, Yanan Zhi, Yu Zhou, and Liren Liu "Optical 90-deg hybrid of birefringent crystals for freely propagating laser beams," Optical Engineering 49(12), 125004 (1 December 2010). https://doi.org/10.1117/1.3526334

Published: 1 December 2010

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