Increased efficiency of Er:YAG lasers at 1645 nm using narrow bandwidth diode lasers and dual-wavelength resonant pumping

Haro Fritsche; Oliver Lux; Casey Schuett; Stefan W. Heinemann; Marcus Dziedzina; Wolfgang Gries; Hans J. Eichler

doi:10.1117/12.2040427

28 February 2014 Increased efficiency of Er:YAG lasers at 1645 nm using narrow bandwidth diode lasers and dual-wavelength resonant pumping

Haro Fritsche, Oliver Lux, Casey Schuett, Stefan W. Heinemann, Marcus Dziedzina, Wolfgang Gries, Hans J. Eichler

Author Affiliations +

Proceedings Volume 8959, Solid State Lasers XXIII: Technology and Devices; 895907 (2014) https://doi.org/10.1117/12.2040427
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

We demonstrate cw and Q-switched operation of Er:YAG laser systems emitting eye-safe radiation at 1645 nm. High brightness, narrow bandwidth diode laser modules at 1532 nm are used for resonant pumping, providing an absorption efficiency of 96%. Comparison with broadband diode pumping at 1455 nm shows an increase of the pumping efficiency by a factor of 2.5, leading to an optical efficiency of more than 25% in cw and 10 % in Q-switched mode under cw pumping. In addition, dual-wavelength resonant pumping of the Er:YAG laser is investigated.

Citation Download Citation

Haro Fritsche, Oliver Lux, Casey Schuett, Stefan W. Heinemann, Marcus Dziedzina, Wolfgang Gries, and Hans J. Eichler "Increased efficiency of Er:YAG lasers at 1645 nm using narrow bandwidth diode lasers and dual-wavelength resonant pumping", Proc. SPIE 8959, Solid State Lasers XXIII: Technology and Devices, 895907 (28 February 2014); https://doi.org/10.1117/12.2040427

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