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Proceedings Paper

Diamond cooling of high-power diode-pumped Nd:YVO4 and Nd:YAG lasers
Author(s): Yitshak Tzuk; Alon Tal; Sharone Goldring; Yaakov Glick; Eyal Lebiush; Raphael Lavi
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Paper Abstract

We have demonstrated the feasibility of cooling high power solid-state lasers with diamond windows, whose thermal conductivity is about two orders of magnitude higher than sapphire's, the material conventionally used for this purpose. 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. An output power of 200Watt was achieved from a single Nd:YVO4 slab in a zigzag configuration when pumped with 600Watt diodes at 808nm. The maximum output power previously reported in the literature with Nd:YVO4 using conventional cooling schemes is only about 100W. 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. The output of a two-head configuration was 295Watt. By using a RTP Q-switch, 124Watt average power was obtained at 15kHz with a pulse width of 17nsec, pumping at 650Watt. An additional larger head was developed to pump a Nd:YAG slab. The concept of the pumping and cooling is identical to the Nd:YVO4 laser head. An output power of 1000Watt was achieved from a single Nd:YAG slab when pumped with 2500Watt diodes at 808nm. The slab dimensions are 3×12×90mm3.

Paper Details

Date Published: 1 June 2005
PDF: 15 pages
Proc. SPIE 5792, Laser Source and System Technology for Defense and Security, (1 June 2005); doi: 10.1117/12.603282
Show Author Affiliations
Yitshak Tzuk, Soreq NRC (Israel)
Alon Tal, Soreq NRC (Israel)
Sharone Goldring, Soreq NRC (Israel)
Yaakov Glick, Soreq NRC (Israel)
Eyal Lebiush, Soreq NRC (Israel)
Raphael Lavi, Soreq NRC (Israel)


Published in SPIE Proceedings Vol. 5792:
Laser Source and System Technology for Defense and Security
Gary L. Wood, Editor(s)

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