Novel solid laser

Abstract

The invention discloses a novel solid laser which comprises a pumping system, a laser system and an air cooling system used for cooling the laser system and the pumping system; the pumping system andthe laser system are arranged in a metal shell, the laser system is independently packaged by a packaging shell, and the pumping system comprises a driving power supply, a semiconductor laser pumpingarray and a focusing lens group; the driving power supply drives the semiconductor laser pumping array to emit pumping light, the pumping light is input into the laser system through the focusing lensgroup, and the laser system comprises an input mirror module, a bonding crystal module, an intermediate mirror module, a nonlinear crystal module and an output mirror module; according to the invention, an inclined passively Q-modulated saturable absorber is thermally bonded on the side edge of a laser crystal, and undoped matrix materials are bonded on the two side edges of the laser crystal bonded with the saturable absorber respectively to form the bonded crystal, so that a passively Q-modulated mode is realized, and the volume of the novel solid laser is reduced.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a novel solid-state laser. Background technique [0002] Diffusion bonding is to firstly attach two crystals closely together after a series of surface treatments to form a photoresist at room temperature, and then heat-treat the crystals to form a permanent bond without other binders. Combined, the experiment shows that when the undoped crystal is bonded to the two ends of the same matrix doped crystal as the end cap, the temperature rise of the end surface is very small, which is close to the temperature of the coolant, which reduces the thermal lens effect and the thermally induced wavelength of the spectroscopic coating. The distortion of the end face caused by the movement is conducive to the stability of the laser and the operation of the high-power laser. Therefore, this thermal bonding technology can not only greatly improve the laser thermal performance and beam quality ...

AI Technical Summary

Problems solved by technology

The former has a simple structure, but is difficult to implement and has poor stability. The latter requires two lasers as pump sources, and the system is complex and expensive, which is not conducive to practical application; the third is to perform frequency doubling after Raman frequency shift of the fundamental frequency laser (or sum frequency) to obtain yellow laser output, although this method involves two nonlinear conversions of Raman frequency shift and frequency doubling (or sum frequency), due to the growth technology of the corresponding laser crystal, Raman crystal and frequency conversion crystal It is very mature, and it is easy to find a suitable pump source, and a yellow laser output with considerable efficiency can be obtained through a suitable resonant cavity design

However, the existing lasers that use the Raman frequency shift to perform frequency doubling (or sum frequency) to obtain yellow laser light have a very low conversion rate of the Raman crystal due to the continuous output mode. The conversion efficiency of the frequency light is closely related to the pulse energy and peak power of the fundamental frequency light, which seriously affects the output efficiency of the laser. Therefore, it is necessary to compress the energy in the time dimension and improve the conversion efficiency of the Raman crystal by generating pulses. Q-Switching Technology

Active Q-switching acousto-optic Q-switches and electro-optic Q-switches are expensive and bulky, about 60*40*40mm, which makes the laser structure not compact and requires a power supply nearly ten times the size of the active Q-switch ( About 170*80*70mm) to drive, this kind of Q-switching method is not suitable for application in products

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