Pulse full-fiber laser

Abstract

The invention relates to a pulse full-fiber laser consisting of a master oscillator and a power amplifier, wherein the master oscillator consists of a semiconductor pump source with pigtailed fiber, a(1+1)*1 side coupler, signal light reflection fiber bragger grating double-wrapping-layer Yb-doped fiber, a fiber coupling acoustic optical modulator and an output coupled fiber bragger grating; pumpinput fiber in the (1+1)*1 side coupler is connected with the semiconductor pump source with pigtailed fiber; output fiber is connected with a signal light reflection fiber bragger grating or the output coupled fiber bragger grating; double-wrapping-layer Yb-doped fiber and the fiber coupling acoustic optical modulator are sequentially welded between the signal light reflection fiber bragger grating and the output coupled fiber bragger grating; and the output coupled fiber bragger grating or signal input fiber in the (1+1)*1 side coupler is connected with a signal input end of a power amplifier. The whole system of the pulse full-fiber laser only is simply air cooled, has the advantages of compactness, adjustable repetition frequency, narrow output pulse width, high peak power, and the like, and is stable and reliable and is easy to realize the product forming.

Description

technical field [0001] The invention relates to a pulsed all-fiber laser. Background technique [0002] Pulsed fiber lasers have many advantages such as compact structure, good beam quality, narrow pulse width, high peak power, and no need for water cooling. They can be widely used in marking, plastic surgery, micromachining, and laser medicine. one of the directions. At present, there are three main ways to obtain high-beam quality, high-power, and short-pulse lasers: mode-locking technology, Q-switching technology, and master oscillation-amplification (MOPA) technology. [0003] Mode-locked fiber laser (see prior art [Opt.Comm., 2000, 186: 311]) has a complex structure and narrow output pulse width, which is a key technology for time-division multiplexing in optical communication systems, but due to the double cladding The size of the inner cladding of the fiber is much larger than that of the ordinary fiber, and there are certain problems in the coupling with the ordina...

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Problems solved by technology

[0003] Mode-locked fiber laser (see prior art [Opt.Comm., 2000, 186: 311]) has a complex structure and narrow output pulse width, which is a key technology for time-division multiplexing in optical communication systems, but due to the double cladding The size of the inner cladding of the fiber is much larger than that of the ordinary fiber, and there are certain problems in the coupling with the ordinary fiber, as well as the limitation of the nonlinear effect of the fiber. Therefore, it is difficult to achieve high-energy pulsed laser output in the double-clad fiber by using mode-locking technology.

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