Multi-wavelength large mode volume laser

Abstract

The invention relates to a multi-wavelength large mode volume laser, which uses a broadband laser gain medium and a chromatic dispersion optical element in a resonant cavity; the path separation of different resonant wavelengths on the laser gain medium is realized; the multi-wavelength large mode volume laser common path output is further realized. The multi-wavelength large mode volume laser comprises a pumping source, a resonant cavity full reflection mirror, a resonant cavity output coupling mirror, the laser grain medium and the chromatic dispersion optical element, wherein the chromaticdispersion optical element realizes different paths of different resonant wavelengths on the laser gain medium; the wide-gain laser grain medium realizes multi-wavelength laser gain; the mode competition among different laser wavelengths is avoided; the simultaneous resonance of multi-wavelength laser is realized. The invention provides a novel laser structure; the laser power density of the lasergain medium can be reduced; the heat radiation area is increased; the laser output power is improved; the multi-wavelength laser common path high beam quality output is realized.

Description

technical field [0001] The invention belongs to the field of laser technology and lasers, in particular to a multi-wavelength large-mode volume laser. Background technique [0002] Since Maiman invented the laser in 1960, after decades of development, laser technology has been applied in many fields such as laser cutting, laser welding, laser engraving, laser imaging, and laser detection. more important position. As a core component in laser applications, people put forward various requirements for the output power, photoelectric efficiency, beam quality, output wavelength and stability of lasers. It is a research hotspot and an important development direction in the laser field today. It is one of the major directions in the Outline of Science and Technology Development Plan (2006-2020). [0003] In order to achieve high-power laser output, a large-diameter laser gain medium is often used. It is expected to increase the storage energy of the laser gain medium, increase th...

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Problems solved by technology

The unstable cavity structure can also increase the cross-sectional area of ​​the laser in the gain medium in the laser resonator, but there is a problem that the output laser is a ring-shaped hollow beam and the laser side lobe consumes the energy of the main lobe of the laser.

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