1 December 2010 Optical 90-deg hybrid of birefringent crystals for freely propagating laser beams
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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)
Lingyu Wan, Yanan Zhi, Yu Zhou, 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 . Submission:
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