Polarization maintaining fiber apodization grating production method

A manufacturing method and technology of polarization-maintaining fibers, which are applied in cladding fibers, optical waveguides, lasers, etc., can solve the problems of low grating side lobe suppression ratio, limited measurement range, accuracy, and detection sensitivity of peripheral measuring equipment, etc. Screening single, conducive to multiplexing, stable and reliable use
CN101101352AInactive Publication Date: 2008-01-09西安盛佳光电有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
西安盛佳光电有限公司
Publication Date
2008-01-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is a method for making polarization maintaining optical fiber apodized gratings, for obtaining fiber gratings with bandwidth less than 1.0nm and side lobe suppression ratio greater than 25dB, comprising the steps of: using quasi-molecular laser to generate UV light, and using flat reflector to make 90 deg parallel refraction on the UV light; then using columnar lens with radius of curvature of 101.7mm to vertically compress facula of the UV light after beam expansion; using the compressed UV light to vertically irradiate Hanning window function amplitude template and making amplitude modulation on the incident parallel UV light and obtaining a beam of UV light whose luminous flux is distributed according to the required apodized function; and finally using the phase template to expose photosensitive polarization maintaining optical fiber. And the invention mainly applies to pumping amplifiers and polarization maintaining optical fiber sensors in 860nm-1610nm wavelength range.
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Description

technical field

[0001] The invention relates to the field of optical fiber gratings, in particular to a method for manufacturing a polarization-maintaining optical fiber apodized grating. Background technique

[0002] Fiber Bragg grating is a kind of fiber optic device, and its raw material is photosensitive fiber. The basic manufacturing method of fiber Bragg grating is to expose photosensitive fiber to ultraviolet light, so that the refractive index of photosensitive fiber changes periodically along the axial direction. There is a large refractive index difference between the two ends of the ordinary fiber grating and its pigtail. This refractive index difference will cause end reflection, and the existence of end reflection will seriously affect the performance of the fiber grating. It makes the reflective fiber Bragg grating such as fiber Bragg The side mode suppression ratio of gratings, chirped fiber gratings and other gratings is reduced, so that there is a large osci...

Claims

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