Measurement device and method for fiber optic interferometer arm length difference on the basis of white light interference
A fiber optic interferometer and measurement device technology, applied in the direction of measurement devices, optical devices, instruments, etc., can solve problems such as failure to meet the design requirements of fiber optic interferometer systems, fiber breakage, limited resolution, and algorithm accuracy
Inactive Publication Date: 2019-02-15
WEIHAI BEIYANG ELECTRIC GRP CO LTD BEIJING BRANCH
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Problems solved by technology
[0002] The length of the two arms of the fiber optic interferometer generally reaches tens of meters or even hundreds of meters. In the industry, manual measurement is usually used to release all the fibers and measure them section by section. This will easily cause fiber breakage and loss during the length measurement process. The longer the optical fiber, the greater the measurement error; even if OTDR or pulse pairs are used, both are limited by their own resolution and algorithm accuracy, and enter decimeter or even meter-level errors, which cannot meet the system design requirements of fiber optic interferometers
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[0017] The present invention will be further described below in conjunction with the accompanying drawings.
[0018] as attached figure 1 As shown, the present invention proposes an optical fiber interferometer arm length difference measurement device based on white light interference, which is characterized in that it is provided with a light source 1, a spectrometer 2, a 2*2 coupler 3, a compensating optical fiber 4, an optical fiber stretcher 5, The fiber optic interferometer 6, wherein the output end of the light source 1 and the output end of the spectrometer 2 are respectively connected to the two inputs of the 2*2 coupler 3, and one output of the 2*2 coupler 3 is connected to the input end of the fiber optic interferometer 6 / The output end, the other output is connected to the output end / input end of the optical fiber interferometer 6 through the compensation optical fiber 4 , and the optical fiber stretcher 5 is arranged on the compensation optical fiber 4 .
[0019]...
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The invention relates to the technical field of fiber optic sensing, in particular to a measurement device and method for a fiber optic interferometer arm length difference on the basis of white lightinterference. The device is characterized in that the device is provided with a light source, a spectrograph, a 2*2 coupler, a compensation fiber optic, a fiber optic tensioner and a fiber optic interferometer, wherein the output end of the light source and the output end of the spectrograph are connected with two paths of input of the 2*2 coupler; one path of output of the 2*2 coupler is connected with the input end / output end of the fiber optic interferometer, and the other path of output is connected with the input end / output end of the fiber optic interferometer through the compensationfiber optic; and the compensation fiber optic is provided with the fiber optic tensioner. Compared with the prior art, the device has the obvious advantages of being simple in operation, accurate inmeasurement and the like.
Description
Technical field: [0001] The invention relates to the technical field of optical fiber sensing, in particular to a device and method for measuring arm length difference of an optical fiber interferometer based on white light interference, which is easy to operate and accurate in measurement. Background technique: [0002] The length of the two arms of the fiber optic interferometer generally reaches tens of meters or even hundreds of meters. In the industry, manual measurement is usually used to release all the fibers and measure them section by section. This will easily cause fiber breakage and loss during the length measurement process. The longer the optical fiber, the greater the measurement error; even if OTDR or pulse pairs are used, both are limited by their own resolution and algorithm accuracy, and enter decimeter or even meter-level errors, which cannot meet the system design requirements of fiber optic interferometers. Invention content: [0003] Aiming at the sh...
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Login to View More IPC IPC(8): G01B9/02
CPCG01B9/02
Inventor 黄晓砥丁兆斌李昌杰
Owner WEIHAI BEIYANG ELECTRIC GRP CO LTD BEIJING BRANCH