High-energy D2O submillimeter laser for plasma diagnostics
Abstract
A narrow line optically pumped D2O laser operating at 385 microns has delivered more than 5J in pulses longer than 3 microseconds using a large aperture unstable resonator cavity design. Pulse levels greater than 1J, 1 microsecond are necessary for a single shot ion temperature measurement by Thomson scattering in large Tokamaks. Experiments have, for the most part, been conducted at a 360J, 5 microsecond CO2 laser pump level where high efficiency (approximately 2.5 J at 385 microns) has been obtained. These are the highest energies reported to date in the far infrared. In addition, the pulse length has been extended beyond the vibrational relaxation time.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- January 1983
- Bibcode:
- 1983STIN...8331014S
- Keywords:
-
- Heavy Water;
- High Power Lasers;
- Infrared Lasers;
- Plasma Diagnostics;
- Pulsed Lasers;
- Submillimeter Waves;
- Carbon Dioxide Lasers;
- Far Infrared Radiation;
- Injection Lasers;
- Thomson Scattering;
- Lasers and Masers