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1x2 high speed optical fiber switch having return coupling monitoring structure

A feedback monitoring, optical fiber switch technology, applied in the field of optical switches, can solve the problems of increased crosstalk of optical switches, affecting the performance of optical switches, changes of temperature-dependent polarized light and predetermined offsets, etc. The effect of the small size of the device structure

Inactive Publication Date: 2009-10-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lithium niobate (LiNbO 3 ) Crystals, transparent electro-optic ceramics and other electro-optic materials, due to their own characteristics (such as differences in manufacturing, temperature dependence, etc.), they cause the change of polarized light to deviate from the predetermined one, which leads to an increase in the crosstalk of the optical switch and affects the light. switch performance

Method used

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  • 1x2 high speed optical fiber switch having return coupling monitoring structure
  • 1x2 high speed optical fiber switch having return coupling monitoring structure
  • 1x2 high speed optical fiber switch having return coupling monitoring structure

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Embodiment Construction

[0021] Such as figure 1 , figure 2 As shown, a 1x2 high-speed fiber switch with a feedback monitoring structure is to place a single fiber collimator 1, a first birefringent crystal 2, a first λ / 2 wave plate group 3, an electro-optical unit 4, and an electro-optical unit in sequence on the same horizontal optical path. The second λ / 2 wave plate group 5, the second birefringent crystal 6, the third λ / 2 wave plate group 7, the third birefringent crystal 8, the beam splitter 9, the roof prism 10 and the double fiber collimator 11, The photodetector 12 is placed on the vertical optical path of the beam splitter 9.

[0022] The electro-optical unit 4 is lithium niobate (LiNbO 3 ) Electro-optical materials such as crystals and transparent electro-optical ceramics. When no voltage is applied to the electro-optical unit, the polarization state of the light passing through the electro-optical unit does not change, and the light is output from the first output port; when a half-wave volta...

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Abstract

The invention discloses a 1x2 high-speed optical fiber switch with a feedback monitoring structure. The optical switch structure is to place a single fiber collimator, a first birefringent crystal, a first λ / 2 wave plate group, an electro-optical unit, a second λ / 2 wave plate group, and a second birefringent crystal on the same horizontal optical path. , a third λ / 2 wave plate group, a third birefringent crystal, a beam splitter, a roof prism and a double fiber collimator, and the photodetector is placed on the vertical optical path of the beam splitter. The fast switching of light from one input port to two output ports is realized by controlling the voltage applied on the electro-optical unit, and the feedback monitoring function is provided to reduce the crosstalk between the two output ports of the optical switch. The structured light switch has the advantages of small structure volume, high switching speed, small crosstalk, etc., and can be applied in the field of optical communication.

Description

Technical field [0001] The invention relates to an optical switch, in particular to a 1x2 high-speed optical fiber switch with a feedback monitoring structure. Background technique [0002] Optical switches are widely used in the field of optical communications to realize the switching of light from one or more input ports to one or more output ports. The 1x2 optical switch is used to switch the optical path from one input port to two output ports, and can be used for network self-protection, network monitoring functions, and fiber optic communication device testing. A combination of multiple 1x2 optical switches can also construct optical switches with more ports such as 1x4 and 1x8. [0003] Optical switches are classified according to the working medium, including free-space switches and waveguide switches; if they are classified according to their working principles, they can be divided into two categories: mechanical and non-mechanical. Mechanical optical switches move by op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/03G02B6/35
Inventor 刘文娟金晓峰章晓敏章献民池灏
Owner ZHEJIANG UNIV