Abstract
In order to relax the limitation of the number of multiplexed signal
lights caused by beat noise between signal lights, we investigate the applicability
of a heterodyne detection technique to a spectral amplitude coding optical
code division multiple access scheme. In this investigation, for the first
time, we found analytically that the optical frequency chips that form parts
of the signal and local lights require uniform phase differences even for
envelope detection. We also confirm this requirement and our theoretical analysis
experimentally.
© 2008 IEEE
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