Method of high power ytterbium doped fiber laser of neodymium-doped fiber laser pump

Abstract

The invention relates to a method of a high power ytterbium doped fiber laser of a neodymium-doped fiber laser pump. The method uses semiconductor laser pump neodymium-doped fibers with centre wavelength of about 808nm (+-10nm) to output fiber lasers with centre wavelength of 920-960nm, and optical fiber laser pumping ytterbium doped fiber produced by a neodymium-doped fiber laser is used for producing optical fiber lasers with centre wavelength of about 1070nm. The method greatly improves luminance of a pumping source, promotes maximum power output of the optical fiber laser in magnitude, has no requirements for doped fibers, simplifies system design and lowers system cost.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, and relates to high-power ytterbium-doped fiber lasers, in particular to a method for pumping ytterbium-doped fibers with neodymium-doped fiber lasers to generate high-power lasers. Background technique [0002] Fiber lasers have the advantages of high conversion efficiency, good beam quality, convenient thermal management, compact structure, etc., and can obtain laser output with high power and high beam quality. Early fiber lasers were mainly used in the fields of communication and sensing, and did not demonstrate the ability to output high power. In recent years, with the development of large-mode-field double-clad doped fiber manufacturing technology and high-brightness laser diode pumping technology, the output power of a single fiber laser has increased rapidly at an astonishing rate. Due to the advantages of mature semiconductor pump source technology and small quantum deficit, high-...

AI Technical Summary

Problems solved by technology

Taking the company's single-mode 10,000-watt-class fiber laser as an example, the wavelength of the pump light is 1018 nm, and the emission wavelength is 1070 nm (Note: The emission spectrum of the ytterbium-doped fiber is relatively wide, generally from 1030 nm to 1120 nm, and the center of the output laser The wavelength is related to the performance of the frequency-selective device, here only 1070 nm is taken as an example), the quantum loss is only 5%, about 1 / 2 of that when the semiconductor laser is directly pumped, which greatly reduces the thermal load density in the fiber

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