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Implementation of differential precoder for high-speed optical DQPSK transmission

Implementation of differential precoder for high-speed optical DQPSK transmission

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© IEE
Published

A precoder concept for high-speed optical differential quaternary phase shift keying (DQPSK) is presented. By excluding external feedback paths, limitations due to circuit and signal propagation delays can be overcome. Operation is demonstrated by transmitting pseudorandom binary sequences with a length of 231−1 at 20 Gbit/s with a bit error ratio of 10−10.

Inspec keywords: differential phase shift keying; random sequences; quadrature phase shift keying; codes; light transmission; delay circuits

Other keywords: signal propagation delays; differential precoder; transmitting pseudorandom binary sequences; 20 Gbit/s; high-speed optical DQPSK transmission; high-speed optical differential quaternary phase shift keying

Subjects: Codes; Pulse circuits

References

    1. 1)
    2. 2)
      • Wree, C.: `RZ-DQPSK format with high spectral efficiency and high robustness towards fiber nonlinearities', Proc. European Conf. on Optical Communication (ECOC'02), September 2002, Copenhagen, Denmark.
    3. 3)
      • Yoshikane, N., Morita, I.: `1.14 b/s/Hz spectrally-efficient 50×85.4 Gb/s transmission over 300 km using copolarized CS-RZ DQPSK signals', PDP38, Proc. Optical Fiber Communication Conf. (OFC'04), February 2004, Los Angeles, CA, USA.
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      • S. Benedetto , E. Biglieri . (1999) Principles of digital transmission.
    7. 7)
      • Zhu, Y.: `1.6 bit/s/Hz orthogonally polarized CSRZ–DQPSK transmission of 840 Gbit/s over 320 km NDSF', TuF1, Proc. Optical Fiber Communication Conf. (OFC'04), February 2004, Los Angeles, CA, USA.
    8. 8)
      • Griffin, R.A.: `10 Gb/s optical differential quadrature phase shift key (DQPSK) transmission using GaAs/AlGaAs integration', FD6-1, Proc. Optical. Fiber Communication Conf. (OFC'02), March 2002, Anaheim, CA, USA.
http://iet.metastore.ingenta.com/content/journals/10.1049/el_20046312
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