A kind of preparation method of high reliability optical fiber filter

Abstract

The invention relates to a manufacturing method for a high reliability fiber filter. The method comprises steps that (1), a filter plate is bonded on a first quartz tube to form a filter plate assembly; (2), a fiber collimator is sleeved in the filter plate assembly, a distance between an end surface of the collimator and the filter plate is adjusted, and a first filtering optical path is formed after bonding and fixing; (3), an end surface of another fiber collimator is sleeved in the first quartz tube, a distance between the end surface of the collimator and an end surface of the quartz tube is adjusted, and a second filtering optical path is formed after bonding through utilizing adhesive; (4), the two collimators are fixed on a five-dimensional adjustment frame, and a second quartz tube is sleeved at the end surfaces of the two collimators to realize connection and fixing effects; (5), whether normal temperature loss of the fiber filter satisfies requirements is determined; (6), a semi-finished fiber filter assembly is acquired after UV adhesive coating and exposure; (7), heat processing for the semi-finished assembly is carried out; and (8), the semi-finished assembly is sleeved in a stainless steel pipe, and and a gap of the stainless steel pipe and two ends are plugged through utilizing silicone rubber.

Description

technical field [0001] The invention belongs to the field of optoelectronic devices, and in particular relates to a preparation method of a high-reliability optical fiber filter. Background technique [0002] As one of the key components of the fiber optic gyro, the erbium-doped fiber light source provides the gyro with the optical signal needed to generate the Sagnac effect. In particular, the light source for a high-precision fiber optic gyroscope must maintain a very stable average wavelength to ensure the stability of the scale factor during the gyroscope's working process. However, the saddle-type erbium-doped light source currently used has a wavelength drift after a total dose of 50Krad (Si) is irradiated, and the average wavelength stability becomes poor under full temperature conditions, which cannot meet the needs of high-precision fiber optic gyroscopes. [0003] The output spectrum of the erbium-doped fiber light source is shaped by the fiber filter to make the ...

AI Technical Summary

Problems solved by technology

The first point: this kind of packaging scheme will lead to poor control of the working distance of a pair of fiber collimators, and the insertion loss index at room temperature is poor; the second point: because the first and second filter optical paths are fixed with ultraviolet glue, the reliability is relatively low Low; the third point: the two-tube packaging coupling process is more complicated and the production efficiency is lower

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