Design of optical hybrids based on a subwavelength polarization grating

WAN Ling-yu; BAN Wei-hua; LU Zhi-yong

doi:10.3969/j.issn.1001-3806.2011.03.018

LASER TECHNOLOGY > 2011 > 35(3): 356-359. > DOI: 10.3969/j.issn.1001-3806.2011.03.018

WAN Ling-yu, BAN Wei-hua, LU Zhi-yong. Design of optical hybrids based on a subwavelength polarization grating[J]. LASER TECHNOLOGY, 2011, 35(3): 356-359. DOI: 10.3969/j.issn.1001-3806.2011.03.018

Citation:

WAN Ling-yu, BAN Wei-hua, LU Zhi-yong. Design of optical hybrids based on a subwavelength polarization grating[J]. LASER TECHNOLOGY, 2011, 35(3): 356-359. DOI: 10.3969/j.issn.1001-3806.2011.03.018

Citation:

WAN Ling-yu, BAN Wei-hua, LU Zhi-yong. Design of optical hybrids based on a subwavelength polarization grating[J]. LASER TECHNOLOGY, 2011, 35(3): 356-359. DOI: 10.3969/j.issn.1001-3806.2011.03.018

Design of optical hybrids based on a subwavelength polarization grating

College of Physics Science and Technology, Guangxi University, Nanning 530004, China

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Received Date: July 13, 2010
Revised Date: August 28, 2010
Published Date: May 24, 2011

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Abstract

Abstract

For the coherent detection of laser beams in free space, a new 24 90 optical hybrid for freely propagating laser beams was proposed based on the diffraction and polarization characteristics of a subwavelength polarization grating. It mainly consists of a subwavelength polarization grating, two half-wave-plates and two polarization splitters. The split and recombination of the signal beam and the local oscillator beam are achieved through the subwavelength polarization grating. The desired phase relation is obtained when orthogonally polarized beam components of the left-circularly and right-circularly polarized light are spatially separated under given conditions so that the rigid phase requirement for the beam splitters in traditional space optical hybrids is avoided and stable phase output can be obtained easily. It has potential applications in field of free-space laser coherent communication.
- optical devices,
- optical coherent detection,
- optical hybrid,
- subwavelength polarization grating,
- 90phase shift

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