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A stable submillimeter laser local oscillator for heterodyne radiometry and spectroscopy |
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| Authors: | Gerhard A. Koepf H. R. Fetterman Nelson McAvoy |
| Affiliation: | (1) Phoenix Corporation, 1700 Old Meadow Road, 22102 McLean, Virginia;(2) Lincoln Laboratory, Massachusetts Institute of Technology, 02173 Lexington, massachusetts;(3) NASA Goddard Space Flight Center, 20771 Greenbelt, Maryland |
| Abstract: | A submillimeter laser with off-axis pump beam injection is described. This design concept achieves complete isolation of the pump laser with respect to the pump radiation reflected from the smm resonator. Active line independent stabilization of the pump laser is obtained by the use of an external tunable etalon as a frequency reference. The smm output power is constant to within 4% over periods of hours. Mean frequency drifts of less than 2 parts in 108 per minute were measured by mixing with very high harmonics of an X-band synthesizer in a planar Schottky diode.Supported in part by NSF |
| Keywords: | sub mm lasers laser local oscillators sub mm heterodyne spectroscopy/radiometry |
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