In this paper, an indirect holographic image reconstruction algorithm was studied for terahertz imaging with a quasi-optics receiver. Based on the combination of the reciprocity principle and modified quasi-optics theory, analytical expressions of the received spatial power distribution and its spectrum are obtained for the interference pattern of target wave and reference wave. These results clearly give the quantitative relationship between imaging quality and the parameters of a Gaussian beam, which provides a good criterion for terahertz quasi-optics transceivers design in terahertz off-axis holographic imagers. To validate the effectiveness of the proposed analysis method, some imaging results with a 0.3 THz prototype system are shown based on electromagnetic simulation.
© 2013 Optical Society of America
Original Manuscript: February 4, 2013
Revised Manuscript: May 6, 2013
Manuscript Accepted: May 13, 2013
Published: May 31, 2013
Xiang Gao, Chao Li, and Guangyou Fang, "Study of image reconstruction for terahertz indirect holography with quasi-optics receiver," J. Opt. Soc. Am. A 30, 1291-1296 (2013)