Laser Damage in Materials
Semi-Annual technical rept. 1 Aug 1972-31 Jan 1973
NATIONAL BUREAU OF STANDARDS WASHINGTON DC INST FOR MATERIALS RESEARCH
Pagination or Media Count:
The relative contributions of the Kerr, electrostrictive, and thermal effects to the self-focusing thresholds of borosilicate crown glass, fused silica, and dense flint glass have been estimated from an analysis of damage threshold data for linearly polarized and circularly polarized radiation. The measurements were made with a Ndglass laser operating in the TEMoo mode with a temporal pulse width of 25 ns. Self-focusing data obtained with linearly polarized and circularly polarized radiation are presented for yttrium aluminum garnet YAG and five commercial Nddoped laser glasses. Self-focusing data obtained in dense flint glass with a longer focal length lens are also presented. An electro-optic shutter actuated by a laser triggered spark gap is discussed.
- Lasers and Masers