Bulk and surface laser damage of silica by picosecond and nanosecond pulses at 1064 nm.
We measured bulk and surface dielectric breakdown thresholds of pure silica for 14 ps and 8 ns pulses of 1064 nm light. The thresholds are sharp and reproducible. For the 8 ns pulses the bulk threshold irradiance is 4.75 +/- 0.25 kW/microm2. The threshold is approximately three times higher for 14 ps pulses. For 8 ns pulses the input surface damage threshold can be made equal to the bulk threshold by applying an alumina or silica surface polish.
Smith
Arlee V
AV
Department 1128, Sandia National Laboratories, Albuquerque, New Mexico 87185-1423, USA. arlee.smith@as-photonics.com
Do
Binh T
BT