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Applied Optics

Applied Optics


  • Vol. 11, Iss. 6 — Jun. 1, 1972
  • pp: 1411–1418

Experimental Evaluation of an Optical Time Division Demultiplexer for Twenty-four Channels

T. S. Kinsel and F. S. Chen  »View Author Affiliations

Applied Optics, Vol. 11, Issue 6, pp. 1411-1418 (1972)

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Experimental techniques for optical demultiplexing by use of sinusoidal polarization switches were evaluated. For this purpose the terminals of a twenty-four-channel optical PCM system were simulated by two channels separated in time by 1 24 th the pulse period. The complete twenty-four PCM channels would have an information rate of 6.7 Gbit/sec. The measured values of cross talk in the demultiplexer were −13 dB and −9 dB for the two channels used in the simulated system. The major contributions to the cross talk were (1) intrinsic cross talk due to the use of a sine wave rather than a square wave for polarization switching (−19.6 dB and −13.1 dB); (2) light leakage in the demultiplexer crystals due to rf heating that gives rise to a nonuniform birefringence (−19 dB, both channels); and (3) misadjustment of the demultiplexer.

© 1972 Optical Society of America

Original Manuscript: October 7, 1971
Published: June 1, 1972

T. S. Kinsel and F. S. Chen, "Experimental Evaluation of an Optical Time Division Demultiplexer for Twenty-four Channels," Appl. Opt. 11, 1411-1418 (1972)

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