Non-feedback precoder for optical DQPSK modulation
Chinese Optics Letters, Vol. 8, Issue 9, pp. 881-883 (2010)
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Abstract
A novel non-feedback precoder circuit for high-speed parallel optical differential quadrature phase shift keying (DQPSK) modulation is proposed. The alternative control signal is introduced in replacement of the conventional feedback one, which eliminates the speed limitation due to the electronic propagation delay. The proposed precoder consists of four differential encoders, an exclusive OR gate, a cross switch, and delay lines. It is demonstrated by a true pseudo random bit sequence (PRBS) transmission at 20 Gb/s.
© 2010 Chinese Optics Letters
OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.5060) Fiber optics and optical communications : Phase modulation
Citation
Lumin Zhang, Yi Dong, Zhaohui Li, Hao He, and Weisheng Hu, "Non-feedback precoder for optical DQPSK modulation," Chin. Opt. Lett. 8, 881-883 (2010)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-8-9-881
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