High order Raman inhibition method based on polarization maintaining optical fiber 45-degree dislocation welding technology

Abstract

The invention provides a high order Raman inhibition method based on a polarization maintaining optical fiber 45-degree dislocation welding technology. The method realizes a polarization rotation function through the characteristic that Raman gain is low when pump wave and Stokes wave in a Raman gain spectrum are subjected to cross polarization in an online polarized Raman fiber laser and the 45-degree dislocation welding of polarization maintaining passive optical fiber, so that the polarization directions of pump light and low order Raman light are not changed, and the polarization directionof high order Raman and the pump light are orthometric, and the high order Raman grain is inhibited.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, and in particular relates to a high-order Raman suppression method. Background technique [0002] Raman fiber lasers based on fiber-optic stimulated Raman scattering are widely used in optical communication, supercontinuum generation, acquisition of special-band light sources, and medical treatment due to their wide gain spectrum and wavelength flexibility. In recent years, with the development of diode-pumped rare-earth ion-doped fiber lasers, the output power of Raman fiber lasers has increased significantly. Among them, linearly polarized Raman fiber lasers have important applications in the fields of frequency conversion and spectrum synthesis. [0003] The current maximum output power of linearly polarized Raman fiber lasers is only on the order of tens of watts, and further power improvement faces problems such as the generation of high-order Raman lasers. At present, there are two m...

AI Technical Summary

Problems solved by technology

The preparation process is complicated, and the insertion loss is relatively high, generally above 10%.

H

Images