Title :
Reduction of FM noise in impatt oscillators by optical illumination
Author :
Seeds, A.J. ; Forrest, J.R.
Author_Institution :
University College London, Microwave Research Unit, Electronic and Electrical Engineering Department, London, UK
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.
Keywords :
IMPATT diodes; electron device noise; laser beam applications; microwave oscillators; 2 dB noise reduction; 5 dB noise reduction; FM noise; GaAs IMPATT oscillator; Si IMPATT oscillator; laser amplitude noise; laser illumination;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19810603
