Improved performance of an optically pumped FIR laser using metallic waveguide
- Electrical Engineering Department, and Institute of Plasma and Fusion Research, University of California, Los Angeles, California 90024 (United States)
- General Atomics, San Diego, California 91121 (United States)
In order to improve the overall output characteristics of far-infrared (FIR) lasers, recent development at UCLA has concentrated on the use of a metallic overmoded waveguide (smooth bore and corrugated) instead of a conventional smooth-bore dielectric waveguide. The metallic waveguide has substantially lower propagation losses, especially at frequencies below 500 GHz, and also supports the desired HE{sub 11} mode. Laboratory results show a substantial increase in output power using a corrugated metallic waveguide, with 37 mW being obtained at 1.22 mm using {sup 13}CH{sub 3}F (isotopic methyl fluoride) while maintaining the same mode quality and polarization. This represents an improvement of 100% over a smooth-bore dielectric waveguide. Comparison of far-infrared output using the three types of waveguide will be made.
- DOE Contract Number:
- FG03-86ER53225
- OSTI ID:
- 7250613
- Journal Information:
- Review of Scientific Instruments; (United States), Vol. 63:10; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLASMA DIAGNOSTICS
LASER RADIATION
FAR INFRARED RADIATION
OPTICAL PUMPING
TEXT DEVICES
WAVEGUIDES
CLOSED PLASMA DEVICES
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
PUMPING
RADIATIONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)