SYMPOSIA PAPER Published: 01 January 1986
STP23104S

Pulsed Laser Induced Optical Damage Threshold In Nd:Cr:GSGG Crystal

Source

Gadolinium scandium gallium garnet (GSGG) doubled doped with neodymium (Nd) and chromium (Cr) shows higher efficiency than the commonly used neodymium doped yttrium aluminum garnet (Nd:YAG) laser. The performance characteristics of 6.3 mm diameter by 100 mm long and 5 mm diameter by 65 mm long Nd:Cr:GSGG rods were obtained. A flashlamp pumped Nd:Cr:GSGG laser was operated in both normal and Q-switch modes. The performance data for the material will be presented and compared with Nd:YAG laser rod.

Q-switch output pulses of Nd:Cr:GSGG laser with 17 ns pulse width and 1.061 μm wavelength were used to study surface and bulk damage in coated and uncoated, polished samples of Nd:Cr:GSGG crystal. These optical damage threshold measurements were compared by measuring damage threshold of fused silica and BK-7 glass samples using the same experimental set up. Nd:Cr:GSGG damage threshold was higher than BK-7 glass and slightly lower than fused silica.

Author Information

Acharekar, MA
Litton Systems, Inc., International Laser Systems Division, Orlando, FL
McCarthy, DP
Litton Systems, Inc., International Laser Systems Division, Orlando, FL
Blachman, R
Material Progress Corporation, Santa Rosa, CA
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Details
Developed by Committee: F01
Pages: 39–48
DOI: 10.1520/STP23104S
ISBN-EB: 978-0-8031-4997-7
ISBN-13: 978-0-8031-0960-5