LIGHT MODULATION DETECTOR

This report describes an experimental and theoretical program for the stabilization of a laser local oscillator. The local oscillator is intended for use in an optical heterodyne receiver for the detection and demodulation of microwave-modulated light. The work in this quarter was divided into three...

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Bibliographic Details
Main Authors: Targ,Russell, caddes,D E, Ammann,E O, Bush,W D, Massey,G A
Format: Report
Language:English
Subjects:
DEMODULATORS
FREQUENCY MODULATION
FREQUENCY STABILIZERS
HELIUM
LASERS
LIGHT
MICROWAVE FREQUENCY
MICROWAVE OSCILLATORS
MIXERS(ELECTRONICS)
NEON
OPTICS
OSCILLATORS
POLARIZATION
STABILIZATION
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Summary:This report describes an experimental and theoretical program for the stabilization of a laser local oscillator. The local oscillator is intended for use in an optical heterodyne receiver for the detection and demodulation of microwave-modulated light. The work in this quarter was divided into three main activities. The first was assembly and test of the electronic and microwave systems which make up the automatic frequency control loop, and the second was evaluation of the single-sideband suppressed-carrier modulator. The third activity consisted of the development of a technique for laser mode control in which the He-Ne laser is operated in a manner which forces the laser's modes to comprise the sidebands of an FM signal. The development of this FM laser makes possible the use of high-power multimode lasers in many applications where one would previously have been limited to the use of single-mode lasers with their necessarily lower power. Also reported is work on techniques which allow certain electro-optic devices, such as shutters and modulators, to be used with light of arbitrary polarization. (Author) See also AD-604 022.