Diamond cooling of high-power diode-pumped solid state lasers

Yitshak Tzuk; Alon Tal; Sharone Goldring; Yaakov Glick; Eyal Lebiush; Guy Kaufman; Raphael Lavi

doi:10.1117/12.478959

17 June 2003 Diamond cooling of high power diode pumped solid state lasers

Yitshak Tzuk, Alon Tal, Sharone Goldring, Yaakov Glick, Eyal Lebiush, Guy Kaufman, Raphael Lavi

Proceedings Volume 4968, Solid State Lasers XII; (2003) https://doi.org/10.1117/12.478959
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

Abstract

We have demonstrated the feasibility of cooling high power solid-stae lasers with diamond windows, whose thermal conductivity is about two orders of magnitude higher than sapphire's. An output power of 200Watt was achieved froma single Nd:YVO₄ slab in a zigzag configuration when pumped with 600Watt diodes at 808nm. The maximum output power reported in the literature with conventional cooling schemes is about 50W. A 2.3x4x24mm³ slab was pumped from its broad side (4x24 mm²) through a 0.3mm thick optical diamond window placed in close contact with the lasing crystal. The diamond window, held in a water-cooled copper housing acted as a heat conductor. The other broad side of the crystal was cooled directly by its water-cooled copper housing. Since pumping and cooling were along the same axis, a Cartesian thermal gradient was achieved, while the zigzag scheme was used to minimize thermal lensing. By using a BBO Q-switch, 70Watt average power was obtained at 20kHz with a pulse width of 19msec and with a beam quality of 3 and 12 times diffraction limit in the zigzag and transverse directions respectively. The output of a two-head configuration was 295Watt.

Citation Download Citation

Yitshak Tzuk, Alon Tal, Sharone Goldring, Yaakov Glick, Eyal Lebiush, Guy Kaufman, and Raphael Lavi "Diamond cooling of high power diode pumped solid state lasers", Proc. SPIE 4968, Solid State Lasers XII, (17 June 2003); https://doi.org/10.1117/12.478959

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