Linear cavity all-fiber laser oscillator for wavelength locking 97Xnm waveband pumping

Abstract

The invention discloses a linear cavity all-fiber laser oscillator for wavelength locking 97Xnm pumping. The linear cavity all-fiber laser oscillator comprises a gain optical fiber, a high-reflectivity fiber bragg grating, a low-reflectivity fiber bragg grating, a semiconductor laser, a pumping signal beam combiner, a signal energy transmission optical fiber, a pumping energy transmission optical fiber and an optical fiber output end cap; the high-reflectivity fiber bragg grating, the gain optical fiber and the low-reflectivity fiber bragg grating are sequentially connected through the signal energy transmission optical fiber to form an optical fiber laser resonant cavity; pump light output by the semiconductor laser is injected into the pumping signal beam combiner through the pumping energy transmission optical fiber and then injected into the optical fiber laser resonant cavity through the signal energy transmission fiber; laser output by the fiber laser resonant cavity is expanded and output through the optical fiber output end cap connected with the optical fiber laser resonant cavity. The absorption coefficient is low, the local thermal load of the gain optical fiber can be effectively reduced, and the nonlinear effect threshold is improved, so that the output power level of the oscillator is improved. The wavelength locking pumping source realizes the stability of the pumping wavelength in a certain temperature range, so that the stability of the output power of the laser is greatly improved.

Description

technical field [0001] The invention belongs to the field of fiber lasers, in particular to a linear-cavity all-fiber laser oscillator pumped by a wavelength-locked 97Xnm wavelength. Background technique [0002] Fiber lasers generally include two types of laser oscillators based on single resonator and laser amplifiers based on the main oscillation power amplification structure. Compared with the main oscillation power amplification structure fiber amplifier, the all-fiber laser oscillator has the advantages of low cost, compact structure, simple control logic, stable performance, strong anti-reflection ability, etc., and has a wide range of applications in industrial processing. [0003] There are many different pumping structures for fiber laser oscillators, such as forward pumping, backward pumping, bidirectional pumping, and distributed pumping. The pump light source is usually a semiconductor single-tube laser or a semiconductor multi-tube combined light source. The ...

AI Technical Summary

Problems solved by technology

Using 976 nm wavelength to pump fiber laser oscillator, its quantum defect is small, the light-to-light conversion efficiency is high, the absorption coefficient is high, the required fiber length is short, but the local heat load is obvious, which makes the mode instability in the fiber easy to occur

Images