Device and method for measuring CD value of MT ferrule through Bragg fiber grating

Abstract

The invention discloses a device and method for measuring the CD value of an MT ferrule through a Bragg fiber grating. The device comprises a supporting table, a horizontal table top, the fiber grating, a force applying device and a wavelength measuring device. The first end of the fiber grating is connected with the wavelength measuring device, the second end is fixed with the force applying device, the middle section is fixed with the top end of the guide pin of the MT ferrule, and the gate region is located between the guide pin and the supporting table. The position of the fiber bragg grating is adjusted through the supporting table, so that the fiber bragg grating is perpendicular to the horizontal table top and is in a slightly tensioned state. The force application device applies axial force to the fiber grating, so that the MT insertion core and the guide pin are deformed, and the fiber grating is stretched at the same time. The wavelength measuring device measures the central wavelength variation of the fiber bragg grating, eliminates the influence of the environment temperature in combination with temperature compensation, and accurately calculates the CD value. According to the invention, high-precision measurement of the CD value is realized, the measurement precision can reach 0.006 microns, and meanwhile, the measurement cost is greatly reduced. The method is simple and convenient to operate, stable and reliable in measurement result and capable of well meeting the high-precision measurement requirement of the CD value of the MT ferrule.

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