Integrating sphere-based high-power fiber grating scattering loss measurement system

Abstract

The invention provides an integrating sphere-based high-power fiber grating scattering loss measurement system. The system comprises a test light source, an optical fiber grating to be tested, an integrating sphere detector, a power display and a computer; the output pigtail of the test light source is connected with an optical fiber which is inscribed with the optical fiber grating to be tested;the integrating sphere detector includes a hollow integrating sphere body; the integrating sphere body is provided with a detector port, a south pole port and a north pole port; the detector port is used for fixedly mounting a detector sensing head; the south port and the north pole port are used for allowing the optical fiber which is inscribed with the optical fiber grating to be tested to passand fixing the optical fiber so as to ensure that the optical fiber grating to be tested can be located at the center of the integrating sphere body; the detector sensing head is connected with the power display so that scattered power at the detector sensing head can be obtained; the power display is connected with the computer; and the computer calculates the total scattered power of the fiber grating to be tested according to an integrating sphere measurement principle. According to the system, scattered power under different wavelengths and power conditions is measured, so that the scattering loss characteristics of the fiber grating can be obtained.

Description

technical field [0001] The invention relates to the technical field of optical fiber grating measurement, in particular to a method for measuring scattering loss of optical fiber gratings and an implementation device. Background technique [0002] Fiber grating refers to a fiber passive device that forms a periodic refractive index modulation along the fiber axis in the fiber core, essentially forming a narrow-band filter or mirror in the fiber core. Fiber Bragg Grating is the core device that constitutes the all-fiber structure laser resonator. Compared with traditional solid-state lasers, all-fiber lasers have the advantages of good beam quality, high conversion efficiency, compact structure, and convenient thermal management. They have broad applications in many fields such as optical communications, industrial processing, material processing, and scientific research. . [0003] A fiber laser resonator is generally composed of a high-reflectivity fiber Bragg grating and...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a high-power fiber grating scattering loss measurement system based on an integrating sphere, which solves the technical problems existing in the existing measurement system

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