Dual-Sagnac loop chromatic dispersion measuring device and method

Abstract

The invention relates to a dual-Sagnac loop chromatic dispersion measuring device and method. The dual-Sagnac loop chromatic dispersion measuring device comprises a broadband light source module, a frequency spectrum monitoring module, a control and data processing module and a dual-Sagnac loop chromatic dispersion detection module. The dual-Sagnac loop chromatic dispersion detection module comprises a first Sagnac loop and an anti-interference module. The first Sagnac loop comprises a first single mode fiber, a second single mode fiber, a frequency shift controller, a polarization controller and a first optical fiber coupler. The anti-interference module comprises a third single mode fiber, a fourth single mode fiber, a disturbance source and a second optical fiber coupler. The dual-Sagnac loop chromatic dispersion measuring device and method have the advantages that the anti-interference module is additionally arranged in an existing chromatic dispersion detection module, the disturbance source is actively introduced so as to restrain the influence of an external interference signal, the contrast ratio of interference fringes is improved, so that the chromatic dispersion measuring precision is improved, the structure is simple, and the measuring speed is high.

Description

technical field [0001] The invention relates to the field of communication, in particular to a dispersion measurement device and method of a double-Sagnac ring for measuring ultra-long-distance optical fiber dispersion at both ends. Background technique [0002] Our company (Wuhan Hongtuo New Technology Co., Ltd.) has applied for a patent "A Dispersion Measuring Device" (application number 201010596208.6), there are two methods of double-ended access and single-ended access to measure optical fiber dispersion, of which double-ended The measurement of optical fiber dispersion in the incident light path will be affected by the external environment (especially noise, vibration, etc.), which will cause the contrast of interference fringes to change with external influences and affect the measurement accuracy. As a result, dispersion information cannot be measured. [0003] In order to solve the above problems, the present invention adds an anti-interference module in the double...

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Problems solved by technology

[0002] Our company (Wuhan Hongtuo New Technology Co., Ltd.) has applied for a patent "A Dispersion Measuring Device" (application number 201010596208.6), there are two methods of double-ended access and single-ended access to measure optical fiber dispersion, of which double-ended The measurement of optical fiber dispersion in the incident light path will be affected by the external environment (especially noise, vibration, etc.), which will cause the contrast of interference fringes to change with external influences and affect the measurement accuracy. resulting in the inability to measure dispersion information

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