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Polarization-maintaining fiber-coupled acousto-optic device with high polarization extinction ratio

A polarization extinction ratio, polarization-maintaining fiber technology, applied in the coupling of optical waveguides, light guides, optics, etc., can solve problems such as the reduction of polarization characteristics of polarized light, and achieve the effect of reducing influence and facilitating polarization adjustment.

Active Publication Date: 2018-01-26
CHINA ELECTRONICS TECH GRP NO 26 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the polarization maintaining fiber system, the polarization transmission characteristics of the acousto-optic crystal will reduce the polarization characteristics of the polarized light entering the second polarization maintaining fiber collimator

Method used

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  • Polarization-maintaining fiber-coupled acousto-optic device with high polarization extinction ratio
  • Polarization-maintaining fiber-coupled acousto-optic device with high polarization extinction ratio
  • Polarization-maintaining fiber-coupled acousto-optic device with high polarization extinction ratio

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Embodiment

[0028] The main structure of the polarization-maintaining fiber-coupled acousto-optic device in the prior art includes a first polarization-maintaining fiber collimator 1-2, an acousto-optic crystal 1-3, a second polarization-maintaining fiber collimator 1-4, and a radio frequency connector 1-8. Matching circuit boards 1-9 and mounting shells 1-10. The installation shell has an inner cavity. The radio frequency connector 1-8 is fixed on the outer surface of the installation shell 1-10, and is electrically connected with the matching circuit board 1-9, and is used for applying the received radio frequency signal to the acousto-optic crystal 1-3 through the matching circuit board. The matching circuit board 1-9 is fixed at a position close to the radio frequency connector 1-8 in the inner cavity of the installation shell. The acousto-optic crystal 1-3 is fixed in the inner cavity of the installation shell, and is electrically connected with the matching circuit board 1-9, and i...

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Abstract

The invention relates to a polarization maintaining optical fiber coupling acousto-optic device, in particular to a polarization maintaining optical fiber coupling acousto-optic device with a high polarization extinction ratio. The transmission main shaft direction of a first polarization maintaining optical fiber collimator and the intrinsic incident light polarization direction of an acousto-optic crystal are on the same straight line; a second polarization element is further fixed in a light transmission line formed by a second polarization maintaining optical fiber collimator and the acousto-optic crystal, and the transmission main shaft direction of the second polarization maintaining optical fiber collimator and the intrinsic diffraction light polarization direction of the acousto-optic crystal are on the same straight line. The light passing main shaft direction of the second polarization element and the transmission main shaft direction of the second polarization maintaining optical fiber collimator are on the same straight line. The incident light of the acousto-optic crystal is emitted in the intrinsic incident light polarization direction of the acousto-optic crystal, the diffraction light of the acousto-optic crystal is output in the intrinsic diffraction light polarization direction of the acousto-optic crystal, and the influence of the polarization transmission property of the acousto-optic crystal is reduced. The polarization elements are utilized for eliminating the influence of the countershaft error of an optical fiber connector to the transmission light polarization property, and the influence of the polarization transmission property of the acousto-optic crystal to the transmission light polarization property is reduced.

Description

technical field [0001] The invention belongs to the field of acousto-optic devices, in particular to a polarization-maintaining optical fiber coupled acousto-optic device with high polarization extinction ratio. Background technique [0002] The polarization-maintaining fiber-coupled acousto-optic device is an acousto-optic device that uses polarization-maintaining fiber for optical coupling on the basis of a free-space photoacousto-optic device. Its input and output light are both linearly polarized light, which can be used in the polarization maintaining fiber system to easily change the propagation characteristics of light. The device adopts a fully solidified optical path, which does not need to be adjusted after being connected to the optical fiber system. It has the characteristics of convenient use, easy integration, and high reliability. It has been widely used in optical signal processing, optical fiber sensing, and optical fiber lasers. [0003] Existing polarizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27G02F1/11
CPCG02B6/2793G02F1/125
Inventor 陈华志刘伟吴中超刘刚
Owner CHINA ELECTRONICS TECH GRP NO 26 RES INST
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