We present an approach that can be used for transmission of information through space-limited systems or for superresolution. The spatial information is coded with different axial temporal coherence by interfering every spatial region in the input with the same region, but with a certain known delay in the longitudinal axis. Every spatial region has different delay. After mixing all of the spatial information, it is transmitted through the space-limited system. At the detection the information is passed through a similar interference setup containing certain axial delay. By temporally scanning along the longitudinal axis, each time a different spatial region that was coded with the corresponding axial delay is reconstructed. To allow coding of different spatial regions with different and small axial delays, we use a thermal light source that has very short coherence length. We include experimental validation of the presented approach.
© 2007 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: October 11, 2006
Revised Manuscript: December 30, 2006
Manuscript Accepted: January 8, 2007
Published: March 5, 2007
Vicente Micó, Javier García, Carlos Ferreira, David Sylman, and Zeev Zalevsky, "Spatial information transmission using axial temporal coherence coding," Opt. Lett. 32, 736-738 (2007)