Digital-holography Efficiency Measurements using a Heterodyne-pulsed Configuration
A digital-holography (DH) system is created in a heterodyne-pulsed configuration, meaning that the reference and signal pulses are nondeterministically correlated in time. Using the off-axis image plane recording geometry, two performance metrics are measured: (1) the total-system efficiency and (2) the ambiguity efficiency. These metrics are compared against the same measured efficiencies for a DH system in a homodyne-pulsed configuration, which uses deterministically correlated reference and signal pulses. The total-system efficiency of both systems is found to be consistent with one another, showing that no new component efficiencies are required when switching from a homodyne- to a heterodyne-pulsed configuration. Additionally, an instantaneous phase modulation model is used to characterize system performance in terms of nonideal pulse overlap. Such a model validates the use of the ambiguity efficiency for future efforts.
Steven A. Owens, Mark F. Spencer, and Glen P. Perram "Digital-holography efficiency measurements using a heterodyne-pulsed configuration," Optical Engineering 61(12), 123101 (5 December 2022). https://doi.org/10.1117/1.OE.61.12.123101