Reduction of FM noise in IMPATT oscillators by optical illumination
Abstract
Experiments are described in which laser illumination of the active device has reduced the FM noise output by up to 5 dB for a GaAs IMPATT oscillator and 2 dB for a Si IMPATT oscillator. A qualitative explanation of the observed results is given, and the effect of laser amplitude noise on the maximum noise reduction obtainable is shown.
- Publication:
-
Electronics Letters
- Pub Date:
- November 1981
- DOI:
- Bibcode:
- 1981ElL....17..865S
- Keywords:
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- Avalanche Diodes;
- Frequency Modulation;
- Gallium Arsenides;
- Microwave Oscillators;
- Noise Reduction;
- Radiation Effects;
- Emission Spectra;
- Laser Outputs;
- Schottky Diodes;
- Semiconductor Diodes;
- Electronics and Electrical Engineering