10. 6 micron parametric frequency converter. Semiannual technical report No. 2, 1 Mar-31 Oct 1975
This program represents an effort to demonstrate nonlinear mixing induced in a molecular gas by the application of a dc electric field. In particular, the molecule NH/sub 2/D is considered as a three-level system interacting simultaneously with applied infrared and microwave radiation. A resonant nonlinear interaction occurs resulting in the generation of a third frequency. This process is allowed because of the removal of inversion degeneracy in the gas by the applied field. A new, completely enclosed, ridged waveguide Stark cell was developed. Single sideband parametric conversion at the difference frequency between the incident CO/sub 2/ laser radiation and the 4 GHz microwave radiation was accomplished with the modified cell, as predicted. This represents the first observation of resonantly-enhanced Stark-induced two-photon mixing in a gas. The parametric signal was further examined as a function of the Stark voltage, NH/sub 2/D pressure, the microwave frequency and power. The results generally confirm predictions.
- Research Organization:
- Hughes Research Labs., Malibu, Calif. (USA)
- OSTI ID:
- 7347339
- Report Number(s):
- AD-A-017863
- Country of Publication:
- United States
- Language:
- English
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Stark-induced three-wave mixing in molecular gases. Part I. Experiment. [CO/sub 2/ laser and 4-GHz microwaves]
10. 6 micron parametric frequency converter. Semiannual technical report, 1 Sep 1974-28 Feb 1975