Quantum-defect-limited operation of Yb:YAG crystal

Junji Kawanaka; Takahiro Shoji; Shigeki Tokita; Masayuki Fujita; Yasukazu Izawa

doi:10.1117/12.611033

23 March 2005 Quantum-defect-limited operation of Yb:YAG crystal

Junji Kawanaka, Takahiro Shoji, Shigeki Tokita, Masayuki Fujita, Yasukazu Izawa

Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.611033
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic

Abstract

Quantum-defect-limited operation in a diode-pumped Yb:YAG oscillator have been demonstrated at low temperature. The highest slope efficiency of 90% was obtained with M²=20 at the crystal temperature below 70 K, which was close to the theoretical stokes efficiency of 91.2% (λ_pump/λ_laser=941nm/1030nm). An optical-to-optical efficiency and a laser gain were 74% and 8 cm^-1, respectively, at a low pump intensity of 1.3 kW/cm². After optimizing a spatial mode coupling between a diode pump laser and a TEM00 cavity mode on the crystal, 80% slope efficiency and 70% optical efficiency were still high at M²=1~1.5.

Citation Download Citation

Junji Kawanaka, Takahiro Shoji, Shigeki Tokita, Masayuki Fujita, and Yasukazu Izawa "Quantum-defect-limited operation of Yb:YAG crystal", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); https://doi.org/10.1117/12.611033

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