A mode scrambling device for homogenizing the output spot intensity of an optical fiber

A homogenization, optical fiber technology, used in optics, optical components, instruments, etc., can solve the problems of high fiber durability requirements, unrealistic long-term application, and inability to quantify the mode scrambling effect. Easy maintenance and adjustment, high control performance
CN102866501BActive Publication Date: 2014-10-22苏州易奥秘光电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
苏州易奥秘光电科技有限公司
Publication Date
2014-10-22

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Abstract

The invention relates to the field of optical fiber sensing, in particular to an emergent light spot strength homogenizing mode-disturbing device for a large-bore-diameter multimode optical fiber. After laser output by a laser sequentially undergoes aperture diaphragm filtration, light spot size of the laser beam and divergence angle of the laser beam are adjusted through a beam expander, incident angles of light of different modes in the laser beam are adjusted through an optical fiber mode-disturbing device, the polarization state of the laser beam is adjusted through a polarizer, the laser is coupled through a lens group and an optical attenuator to enter the optical fiber, and light output through the optical fiber is received by an image sensor. Spatial isolation between independently designed optical fiber mode-disturbing components and the mode-disturbing device and the optical fiber is achieved, the mode-disturbing device is applied to different optical transmission systems conveniently, and damage to the optical fiber is avoided simultaneously. The emergent light spot strength homogenizing mode-disturbing device has the advantages of being quick in modulation speed, high in adjusting performance, good in flexibility, easy to maintain and adjust, economic and practical.
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Description

technical field

[0001] The invention relates to the field of optical fiber sensing, in particular to a mode-scrambling device for uniformizing the intensity of the exit spot of a large-caliber multi-mode optical fiber. Background technique

[0002] With the development of optical fiber technology, there are many different types of optical fibers. Among them, large-aperture multimode optical fiber has attracted more and more attention from the society due to its advantages of multiple transmission modes, low transmission loss, high transmission efficiency, and high transmittance.

[0003] When the large-aperture multimode fiber is used for optical information transmission, the intensity distribution of the exit spot of the fiber changes when the transmitted light undergoes a transformation of a component that limits light transmission, that is, mode noise is generated. The existence of mode noise causes speckle phenomenon after the image is transmitted through the optical fi...

Claims

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