Clamp for dual-beam low-coherence interference optical fiber

Abstract

The invention discloses a clamp for a dual-beam low-coherence interference optical fiber and belongs to the technical field of optical fiber fixing. The clamp comprises a fixed base, a clamp base, a fixing bolt, a cover plate, a middle prism and two side prisms, wherein the clamp base is arranged on the fixed base through the fixing bolt; a through groove is formed on the clamp base; the cover plate is movably arranged on the clamp base and covers an end face where an opening of the through groove of the clamp base is positioned; the middle prism and the two side prisms are fastened in the through groove; and two parallel optical fiber mounting grooves are formed between opposite surfaces of the two side prisms and the middle prism. The invention has the advantages that: the clamp has small volume and light weight, can be easily fixed on other optical benches, and is easily integrated in an optical path system.

Description

technical field [0001] The invention relates to an optical fiber installation and fixing technology, in particular to a fixture for a double-beam low-coherence interference optical fiber that keeps the double-fiber exits in strict parallel. Background technique [0002] In the field of optical measurement, the measurement system based on interference has become one of the systems with the highest precision in the detection of physical quantities, and the interferometry system based on low-coherence measurement technology has become an important development direction in this field. White light sources or broad-spectrum light sources can be collectively referred to as low-coherence light sources, and interferometric systems using low-coherence light sources are called "white light interferometers" or "low-coherence measurement systems". Due to its excellent performance, low-coherence measurement technology is considered to be a very promising interferometry technology. In rece...

AI Technical Summary

Problems solved by technology

[0004] However, in an optical interferometer, in order to keep the two optical fibers in a double-beam low-coherence interference state, and to make the two optical fibers emerge in parallel, the common practice now is to align the end faces of the two processed optical fibers, and then align the two optical fibers. After placing them side by side, stick them on the flat plate with adhesive tape, but this fixing method has the following disadvantages: it is unreliable, and the optical fiber is prone to loosening and misalignment during the process of sticking the tape. If you are not careful, it is easy to scratch the cladding of the optical fiber

In addition, a long section of bare fiber is exposed to the outside, which is easily affected by the air flow, and the interference fringe drift occurs, and its stability is not good, so it is impossible to keep the dual fibers strictly parallel to the output, and it is impossible to ensure that the two fibers are in the dual-beam low-coherence interference state

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