Accession Number : AD0479023


Title :   FACE PUMPED LASER


Descriptive Note : Semi-annual technical summary rept. no. 2, 1 Jun-30 Nov 1965


Corporate Author : GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER


Personal Author(s) : Chernoch, J P ; Martin, W S ; Tomiyasu, K


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/479023.pdf


Report Date : 30 Nov 1965


Pagination or Media Count : 81


Abstract : Refined analyses and measurements showed that the thermal effects due to pumping at 27,000 joules causes the 6-inch diameter 1-inch thick Nd-doped glass disc to warp with a radius of curvature of 370,000 cm. With this warpage the out-of-plane displacement of the disc is about 3/4 wavelength at 1.06 micron. Optical coupling and pumping measurements were carried out on the 3-inch disc pump assembly. After many flashes, with 9000 joules and using ultraviolet and infrared filters, there was no measurable damage to the 1.06 micron high reflective mirror. A preliminary analysis has been carried out on the amount of distortion or deformation permissable in a plane-parallel mirror high Fresnel number Fabry-Perot resonator before the losses introduced become significant. Tipped etalons offer the possibility of mode selection at high power levels. An analysis was carried out investigating the various parameters affecting the design of such mode selectors.


Descriptors :   *LASERS , BEAMS(ELECTROMAGNETIC) , DEFORMATION , DEGRADATION , DISTORTION , DOPING , FLUORESCENCE , GLASS , INTERFERENCE , LENSES , MIRRORS , NEODYMIUM , OPTICAL ANALYSIS , OPTICAL GLASS , OPTICAL PUMPING , REFLECTION , RESONATORS , THICKNESS , XENON LAMPS


Subject Categories : Lasers and Masers


Distribution Statement : APPROVED FOR PUBLIC RELEASE