Improved performance of an optically pumped FIR laser using metallic waveguide

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143659· OSTI ID:7250613

Jiang, Y; Jing, C; Peebles, W A; Brower, D L ^[1]; Doane, J L ^[2]

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1. Electrical Engineering Department, and Institute of Plasma and Fusion Research, University of California, Los Angeles, California 90024 (United States)
2. 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), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:10; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
CLOSED PLASMA DEVICES
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
INFRARED RADIATION
LASER RADIATION
OPTICAL PUMPING
PLASMA DIAGNOSTICS
PUMPING
RADIATIONS
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
WAVEGUIDES