High-Efficiency, Single-Frequency Laser and Modulator Study
Annual technical rept. no. 1, 1 Sep 1970-30 Sep 1971
LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB
Pagination or Media Count:
Theoretical and experimental studies on 1 mode filters for single- frequency NdYAG lasers and 2 wide-bandwidth optical modulators are reported. Stable single-frequency output power of 0.8W was obtained from a NdYAG laser pumped by a 1-kW tungsten lamp. The mode filter consisted of a tilted etalon and a thin metallic film in the laser cavity. Detailed analyses have been made to reduce the insertion loss of mode filters to an absolute minimum so that efficiency can be increased. The electrooptic modulator uses a microwave interdigital filter structure and has a 1.4-GHz bandwidth. A new circuit design aimed at increasing modulation depth for a given rf power has been obtained and tested. No optical damage or beam distortion of LiNbO3 was observed under continuous radiation of 14 kWsq cm green light when the crystal was at 180C.
- Lasers and Masers
- Non-Radio Communications