Two techniques for passive (no-feedback) demodulation of signals from a remote two-beam interferometric sensor are discussed. Termed 'synthetic heterodyne' and 'quadrature recombination', both methods are based on forced sinusoidal modulation of phase within the interferometer. If the phase modulation is generated by linearly proportional frequency modulation of the laser light source, then the interferometer, deployed by means of optical fibers, can be a completely passive remote sensor.
Passive demodulation of optical interferometric sensors
Passive Demodulation von optisch interferometrischen Sonden
IEEE Journal of Quantum Electronics ; 18 , 10 ; 1639-1644
1982
6 Seiten, 3 Bilder, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
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