Resonant cavity inside-pumped disk laser

Abstract

The invention discloses a resonant cavity inside-pumped disk laser, which comprises an active gain mirror, a pump laser with the active gain mirror inserted in a resonant cavity, and a disk laser resonant cavity. According to the invention, a resonant cavity is based on a conventional pump cavity and is further inserted with a gain material made into a sheet to form a reflective mirror of the resonant cavity, or is a resonant cavity formed by amplifying the stimulated radiation light of the sheet crystal itself. According to the invention, the high-power roundtrip laser in a laser resonant cavity is used to achieve the multi-pumping purpose for the disk laser, the disk laser crystal pumped power density in the resonant cavity is more than ten times higher than that outside the cavity, andthe absorption efficiency of the pump light by the disk crystal can be improved, especially for non-absorption peak pumping conditions. In the invention, the pump resonant cavity and the disk laser resonant cavity are independent of each other, the cascade pumping of the disk laser can be realized, and the Q modulation of the pump cavity can also realized to obtain the multi-wavelength, the narrowpulse width and the high peak power pulsed laser output.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and more specifically relates to a novel disk solid-state laser. Background technique [0002] Because of its thin gain medium, the heat conduction direction is consistent with the laser light output direction, the thermal lens effect is weak, the heat transfer effect is good, and it can withstand large laser power density, and can obtain pulsed laser output from continuous to high peak power. recognized by academia and industry. [0003] However, because the disk laser crystal is very thin, the thickness is generally 50 microns to 500 microns, and the single absorption of pump light is weak, so it is necessary to construct a complex structure to pump the disk crystal multiple times, such as Trumpf The company's parabolic mirror and right-angle steering prism multiple pumping scheme, Huazhong University of Science and Technology's double paraboloid conjugate imaging multiple pumping sche...

AI Technical Summary

Problems solved by technology

First, the conjugate double paraboloid is expensive and requires two expensive parabolic mirrors (imported parabolic mirrors with good surface shape, generally with low pv value and small focusing imaging aberration, about 40,000 US dollars per piece) , the system is complex; and our solution only needs common spherical mirrors (one piece is less than 100 RMB)

Second, the pumping scheme of the conjugate double paraboloid system with multiple pumps is to increase the pumping times by spatially shifting the pumping light. The disadvantage of this method is that with the increase of the pumping times, the paraboloid The caliber (size) of the mirror will also increase accordingly, and the cost will also increase; and in our scheme, the number of pumps is more than that of the double paraboloid multiple pumps (theoretically infinitely many times), and there is no need to make any changes to the size of the

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