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15 August 1998 2.5-kW slab Nd:YAG laser using a 400-mm-long crystal bonded by optical contact method
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Abstract
The optical contact method has been developed to obtain a large volume slab Nd:YAG crystal for achieving a multi-kW output power. The bonded crystal with the dimension of 6 X 25 X 402 mm3 (tip to tip) is mounted in a single laser head and is pumped with four krypton arc lamps. In continuous wave (CW) operation, the maximum output power of 2480 W, the overall efficiency (eta) E-O of 4.0% and the slope efficiency of 5.5% have been obtained. A beam quality which is defined as the product of full divergence angle and diameter of the beam waist is better than 10 mm (DOT) mrad and 80 mm (DOT) mrad in the directions of the thickness and the width of the slab, respectively. The output laser beam was transmitted through a GI type 600 micrometer-core optical fiber completely. This configuration has realized a simple resonator laser producing high processing performance.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hisatada Machida, Nobuaki Iehisa, and Norio Karube "2.5-kW slab Nd:YAG laser using a 400-mm-long crystal bonded by optical contact method", Proc. SPIE 3550, Laser Processing of Materials and Industrial Applications II, (15 August 1998); https://doi.org/10.1117/12.317958
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