Effects of Sinusoidal Phase Modulation on the Signal-to-Noise Ratio in a Digital Holography System
Technical Report,01 Sep 2017,21 Mar 2019
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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Digital holography DH has been demonstrated to be an effective tool for tactical applications which involve in low signal-to-noise ratios SNR. In practice, DH uses a strong reference beam from a local oscillator LO to scale SNR, however since DH relies on the interference of a signal beam with a mutually coherent LO, the coherence properties of the master oscillator MO can degrade system SNR for long range engagements. In this thesis, a digital holography system in the off-axis image plane recording geometry was assembled and used to measure the effects of the coherence properties of the MO on SNR.