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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 24,
  • Issue 1,
  • pp. 171-
  • (2006)

Monolithic Demodulator for 40-Gb/s DQPSK Using a Star Coupler

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Abstract

A novel device that demodulates both quadratures of the optical differential quadrature phase-shift keying (DQPSK) format in a single interferometer by using a 4 × 4 star coupler was demonstrated. Simultaneous measurements of both DQPSK quadratures at 42.7 Gb/s are also presented.

© 2006 IEEE

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