High power tube solid-state laser with zigzag propagation of pump and laser beam

Michael Savich

doi:10.1117/12.2080836

20 February 2015 High power tube solid-state laser with zigzag propagation of pump and laser beam

Michael Savich

Proceedings Volume 9342, Solid State Lasers XXIV: Technology and Devices; 934216 (2015) https://doi.org/10.1117/12.2080836
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

A novel resonator and pumping design with zigzag propagation of pumping and laser beams permits to design an improved tube Solid State Laser (SSL), solving the problem of short absorption path to produce a high power laser beam (100 - 1000kW). The novel design provides an amplifier module and laser oscillator. The tube-shaped SSL includes a gain element fiber-optically coupled to a pumping source. The fiber optic coupling facilitates light entry at compound Brewster’s angle of incidence into the laser gain element and uses internal reflection to follow a “zigzag” path in a generally spiral direction along the length of the tube. Optics are arranged for zigzag propagation of the laser beam, while the cryogenic cooling system is traditional. The novel method of lasing uses advantages of cylindrical geometry to reach the high volume of gain medium with compactness and structural rigidity, attain high pump density and uniformity, and reach a low threshold without excessive increase of the temperature of the crystal. The design minimizes thermal lensing and stress effects, and provides high gain amplification, high power extraction from lasing medium, high pumping and lasing efficiency and a high beam quality.

Citation Download Citation

Michael Savich "High power tube solid-state laser with zigzag propagation of pump and laser beam", Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 934216 (20 February 2015); https://doi.org/10.1117/12.2080836

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