Noise Aliasing In Interferometric Sensors Utilizing Phase-Generated Carrier Demodulation

T. A. Berkoff; A. D. Kersey; A. Dandridge

doi:10.1117/12.963020

13 February 1990 Noise Aliasing In Interferometric Sensors Utilizing Phase-Generated Carrier Demodulation

T. A. Berkoff, A. D. Kersey, A. Dandridge

Proceedings Volume 1169, Fiber Optic and Laser Sensors VII; (1990) https://doi.org/10.1117/12.963020
Event: OE/FIBERS '89, 1989, Boston, United States

Abstract

We show that high frequency phase-noise is frequency translated to the baseband in interferometric sensors using phase-generated carrier (PGC) demodulation. Under normal circumstances, this excess noise does not contribute significantly to the true low frequency phase-noise arising due to 1/f laser frequency jitter. However, when a phase noise stabilized laser is used, degradation in phase sensitivity of an interferometer can occur using PGC demodulation when compared with direct homodyne detection. The origins and nature of this noise are discussed, and experimental verification of the effect presented.

Citation Download Citation

T. A. Berkoff, A. D. Kersey, and A. Dandridge "Noise Aliasing In Interferometric Sensors Utilizing Phase-Generated Carrier Demodulation", Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); https://doi.org/10.1117/12.963020

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