Optical implementation of orthogonal phase-code multiplexing

Yeon H. Lee; Seung-Dae Sohn

doi:10.1364/OL.26.001990

Optics Letters
Vol. 26,
Issue 24,
pp. 1990-1992
(2001)
•https://doi.org/10.1364/OL.26.001990

Optical implementation of orthogonal phase-code multiplexing

Yeon H. Lee and Seung-Dae Sohn

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Yeon H. Lee and Seung-Dae Sohn, "Optical implementation of orthogonal phase-code multiplexing," Opt. Lett. 26, 1990-1992 (2001)

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Abstract

We propose a new optical implementation of orthogonal phase-code multiplexing in which an arbitrary phase shift of $θ$ or $θ + π$ is used in the reference beam instead of 0 or $π$ as in the conventional method. To compare the new and the conventional methods, we employ a 2-bit orthogonal phase code and store two binary-data images in a ${BaTiO}_{3}$ crystal with each method. We also employ numerical methods to simulate the 2-bit phase-code multiplexing and show that the signal-to-noise ratio in the restored images is improved by more than one order of magnitude in the new method in our experimental conditions.

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	Bit
Code	1	2	3	4	5	6	7	8
1	$θ_{1}$	$θ_{1}$	$θ_{1}$	$θ_{1}$	$θ_{1}$	$θ_{1}$	$θ_{1}$	$θ_{1}$
2	$θ_{2}$	$θ_{2}$	$θ_{2}$	$θ_{2}$	$(θ_{2} + π)$	$(θ_{2} + π)$	$(θ_{2} + π)$	$(θ_{2} + π)$
3	$θ_{3}$	$θ_{3}$	$(θ_{3} + π)$	$(θ_{3} + π)$	$(θ_{3} + π)$	$(θ_{3} + π)$	$θ_{3}$	$θ_{3}$
4	$θ_{4}$	$θ_{4}$	$(θ_{4} + π)$	$(θ_{4} + π)$	$θ_{4}$	$θ_{4}$	$(θ_{4} + π)$	$(θ_{4} + π)$
5	$θ_{5}$	$(θ_{5} + π)$	$(θ_{5} + π)$	$θ_{5}$	$θ_{5}$	$(θ_{5} + π)$	$(θ_{5} + π)$	$θ_{5}$
6	$θ_{6}$	$(θ_{6} + π)$	$(θ_{6} + π)$	$θ_{6}$	$(θ_{6} + π)$	$θ_{6}$	$θ_{6}$	$(θ_{6} + π)$
7	$θ_{7}$	$(θ_{7} + π)$	$θ_{7}$	$(θ_{7} + π)$	$(θ_{7} + π)$	$θ_{7}$	$(θ_{7} + π)$	$θ_{7}$
8	$θ_{8}$	$(θ_{8} + π)$	$θ_{8}$	$(θ_{8} + π)$	$θ_{8}$	$(θ_{8} + π)$	$θ_{8}$	$(θ_{8} + π)$

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