Polarization maintaining fiber intermode interference output side lobe extractor and manufacturing method thereof

Abstract

The invention relates to a polarization maintaining fiber intermode interference output side lobe extractor which mainly comprises quartz blocks with the same material as a fiber cladding, single mode fibers, light detectors and polarization maintaining fibers. The manufacturing method comprises the following steps of: respectively forming grooves on two quartz blocks, respectively tightly embedding two single mode fibers into the grooves and firmly bonding, then performing precision grinding, precisely aligning the two quartz blocks which are well ground and firmly bonding, wherein one end of each single mode fiber is connected with the light detector; forming grooves at the middle parts of another two quartz blocks according to the radius size of the polarization maintaining fibers, embedding the polarization maintaining fibers into the grooves, aligning one surfaces with the grooves of the two quartz blocks and firmly bonding; and polishing the end surfaces of the well bonded quartz block group with the polarization maintaining fibers and the well bonded quartz block group with the single mode fibers without exposing the fibers, and then bonding and fixing. The polarization maintaining fiber intermode interference output side lobe extractor disclosed by the invention has the advantages of simple processing technology, simple structure, low cost, good stability and good side lobe extraction effect.

Description

technical field [0001] The invention relates to the technical field of optical fibers and optical devices, in particular to the field of polarization-maintaining optical fiber intermode interference sensing. Background technique [0002] Polarization-maintaining optical fiber intermode interference technology, as an important branch in the field of optical fiber sensing, has been widely valued since the end of last century. Because of its simple structure, good stability, and low cost, it was once applied to the field of stress detection and high voltage measurement by domestic and foreign scholars, and achieved good results. [0003] However, in the existing polarization-maintaining optical fiber intermode interference sensor technology, there is no intermode interference extractor with simple structure and excellent performance. The single-mode or multi-mode optical fiber is fused and tapered and then fused with the polarization-maintaining optical fiber to realize side l...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing polarization-maintaining optical fiber intermode interference sensor technology, there is no intermode interference extractor with simple structure and excellent performance. The single-mode or multi-mode fiber is fused and tapered and then fused with the polarization-maintaining fiber to achieve side lobe extraction, but the actual production and processing is very difficult, and the light intensity loss of the side lobe obtained by extraction is very large

These problems are the main reasons why the intermode interference of polarization-maintaining optical fiber cannot realize all-fiber and the long-term stability of the optical fiber sensor designed by applying this principle is not good.

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