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Optical experiment and method for implementing optical isolation in optical fiber communication system and device thereof

An optical fiber communication system and isolation device technology, applied in the field of optical isolation, can solve the problems of high cost, large size, large device volume, etc., and achieve the requirements of reducing temperature stability and realizing the effect of miniaturization

Active Publication Date: 2012-09-26
JIANGSU IRON ANCHOR GLASS LTD BY SHARE LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the isolation effect can only be achieved when the two opposite orthogonally polarized light components are separated by a large distance in space, which makes the crystal and Faraday rotator plate or wedge-shaped birefringent crystal used as a polarization beam splitter need to have a large size , resulting in a large device size and high cost

Method used

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  • Optical experiment and method for implementing optical isolation in optical fiber communication system and device thereof
  • Optical experiment and method for implementing optical isolation in optical fiber communication system and device thereof
  • Optical experiment and method for implementing optical isolation in optical fiber communication system and device thereof

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Embodiment Construction

[0038] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0039] see Figure 4 , this embodiment is applied to an optical experimental system built with separate components, including a laser 47, a first linear polarizer 11, a first quarter-wave plate 12, a Faraday rotator 21, a first high-reflectivity reflector 22, Antireflection film 24 , permanent magnet 26 , second high reflectivity reflector 23 , micro displacement device 25 , support 41 , second quarter wave plate 32 , second linear polarizer 31 and reflector 48 . Faraday rotator 21 is placed in the inside of permanent magnet 26, and its magneto-optic material selects yttrium iron garnet crystal (YIG) for use, and it is plated with the reflection film of reflectivity 92% on the front incident light direction end face as the first high reflection A high-efficiency reflector 22, which is coated with an anti-reflection film 24 on the end face of the forward outgoing...

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Abstract

The invention relates to an optical experiment and a method for implementing optical isolation in an optical fiber communication system and a device thereof, which are characterized in that a forward light polarization state control assembly and an isolation assembly and an inverse light polarization state control assembly are sequentially arranged along an optical axis. The invention has the advantages that Faraday magneto-optical material is placed in the Fabry-Perot etalon to implement the effect of high transmissivity to a certain rotating circular polarization and low transmissivity to another inversely rotating circular polarization by using characteristics of different refractive indexes of left and right circular polarizations in the Faraday magneto-optical material, nonreciprocaleffect of Faraday effect and compression and filtering effects to spectrum of the Fabry-Perot etalon, thereby achieving the purpose of optical isolation.

Description

technical field [0001] The invention relates to a method and device for realizing optical isolation in an optical experiment and optical fiber communication system, which is used to prevent the light beam emitted by a light source from returning to the light source after being reflected by an end face of an optical element, and can be applied in optical experiments and optical fiber communication systems , belongs to the technical field of laser and optical fiber communication. Background technique [0002] In optical experiments and optical fiber communication systems, the light beam emitted by the light-emitting device will be reflected by the end face of an optical component in the downstream optical path and return to the light source, resulting in broadening of the light source spectrum, increased noise, power instability, and performance degradation. In order to protect light-emitting devices such as lasers and optical amplifiers, eliminate unwanted reflected light wav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/09
Inventor 底楠赵建林
Owner JIANGSU IRON ANCHOR GLASS LTD BY SHARE LTD
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