High-power mode-locked disc laser

Abstract

The invention discloses a high-power mode-locked disc laser in the technical field of lasers. The high-power mode-locked disc laser has the advantages of being high in average power, simple in structure, good in system stability and the like. A disc laser gain medium, a first concave reflector, a second concave reflector and an output end coupling mirror form a mode-locked laser resonant cavity, and a Kerr medium and a diaphragm are arranged in the mode-locked laser resonant cavity; the Kerr medium is located between the first concave reflector and the second concave reflector, and the first concave reflector and the second concave reflector form a focusing cavity structure; pump light emitted by the pump source goes back and forth on the disc laser gain medium for multiple times through a pump light shaping system, so that the pump light is fully absorbed by the disc laser gain medium. Laser generated by the disc laser gain medium passes through the first concave reflector, the Kerr medium, the second concave reflector, the diaphragm and the output end coupling mirror in sequence to achieve laser output.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to a high-power mode-locked disc laser. Background technique [0002] Ultrashort pulse laser generally refers to a pulse laser source with a pulse width on the order of picoseconds and femtoseconds, which has the characteristics of extremely narrow pulses, extremely wide spectra, and extremely high peak power. In recent years, the rapid development of ultrashort pulse laser technology has brought a series of revolutions to other related disciplines and industrial fields, and greatly promoted the development of many disciplines and fields represented by precision metrology, ultrafast chemistry, biomedicine, and industrial processing. progress. [0003] Mode-locking technology is currently one of the most important and most direct and effective means of generating ultrashort pulse lasers. It can not only generate stable and reliable Fourier transform limit pulses, but also has high op...

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Problems solved by technology

However, in traditional X- or Z-type Kerr lens mode-locked lasers, the laser gain medium performs both functions of the gain medium and the Kerr medium. In order to ensure the realization of Kerr lens mode-locking, not only the laser gain medium is required to have high nonlinear refractive index coefficient, and at the same time, the size of the laser mode in the gain medium should be reduced as much as possible during the design of the resonator, so that it can provide a strong enough self-amplitude modulation effect to realize the ultrashort pulse output of Kerr lens mode locking; but At this time, the small lasing mode in the laser gain medium makes it difficult to support the generation of high average power ultrashort pulse lasing

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