Tunable multi-wavelength multiplexing spectrum modulation and separation system for high-power fiber laser amplification

Abstract

A tunable multi-wavelength multiplexing spectrum modulation and separation system for high-power fiber laser amplification comprises a narrow linewidth seed source, a wavelength division multiplexing module, a spectrum modulation module, a first pre-amplifier, a wavelength separation module, a second pre-amplifier, a main amplifier and an end cap. The spectrum modulation module injects an electrical signal and adopts a tunable filter and a variable attenuator, so that the tunable spectrum line width can be realized, and the system has important application value in many different fields. According to the multi-wavelength common spectrum modulation broadening and separation system, multi-wavelength beam combination and high-precision and high-signal-to-noise-ratio separation can be achieved within the wave band range of 1.0 micrometer or 2.0 micrometers, meanwhile, the same inhibition effect on stimulated Brillouin scattering in multi-wavelength laser high-power optical fiber amplification is achieved, the consistency is shown in laser output power improvement, and the system has the advantages of being high in integration degree, simple in structure, convenient to control and particularly low in manufacturing cost, and miniaturization integration, array expansion and application of large-scale laser array synthesis are greatly facilitated.

Description

technical field [0001] The invention relates to the field of fiber laser technology, in particular to a high-power fiber laser amplification tunable multi-wavelength multiplexing spectrum modulation and separation system. Background technique [0002] High-power narrow-linewidth fiber lasers have the advantages of compact structure, high conversion efficiency, and good output beam quality, and are widely used in laser frequency conversion, laser communication, and industrial processing. Limited by thermal effects, nonlinear effects and other limiting factors of the fiber itself, the output power of a single fiber is still very limited. Large-scale array beaming and combining technologies of high-power narrow-linewidth fiber lasers have been proposed to obtain higher brightness Laser light sources, such as incoherent synthesis such as spectral synthesis and power synthesis. For multi-wavelength high-power narrow-linewidth fiber amplifiers that can be applied to incoherent co...

AI Technical Summary

Problems solved by technology

The entire spectrum modulation and broadening system and its control circuit unit are relatively complex and expensive

For large-scale array laser synthesis, it requires many high-power narrow-linewidth fiber lasers, and each laser has a different wavelength. This kind of spectral modulation and broadening system is particularly complicated in circuit control, and the manufacturing cost increases proportionally.

Images