140 Mbit/s and 560 Mbit/s FSK heterodyne polarisation diversity receiver using nearly perfect square law demodulators

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140 Mbit/s and 560 Mbit/s FSK heterodyne polarisation diversity receiver using nearly perfect square law demodulators

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© The Institution of Electrical Engineers
Published

A new frequency discriminator concept with nearly perfect square law demodulation characteristics is described. The performance of the device is verified in a 140 Mbit/s and 560 Mbit/s FSK heterodyne polarisation diversity transmission experiment

Inspec keywords: optical communication equipment; diversity reception; light polarisation; frequency shift keying; receivers; demodulators

Other keywords: square law demodulators; 560 Mbit/s; frequency discriminator; 140 Mbit/s; FSK heterodyne polarisation diversity receiver

Subjects: Modulators, demodulators, discriminators and mixers; Optical communication

References

    1. 1)
      • Hooijmans, P.W., Tomesen, M.T., van de Grijp, A.: `A linewidth- and bitrate-flexible FSK heterodyne system, using a frequency discriminator and biphase coding', paper ThA21-6, Proc 15th ECOC, 1989.
    2. 2)
      • Imai, T.: `Polarisation diversity receiver using a simple weight controller for coherent lightwave systems', Proc. 14th ECOC, 1988, p. 159–162.
    3. 3)
      • Welter, R., Sessa, W.: `Polarisation sensitivity of ASK heterodyne diversity receivers', Proc. OFC, 1990, p. 131.
    4. 4)
      • Hooijmans, P.W., Tomesen, M.T., Mols, P.P.G.: `A coherent multi-bitrate multi-channel system for simultaneous transmission of 140 Mb/s TV and 560 Mb/s HDTV signals', Proc 16th ECOC, 1990.
    5. 5)
      • R. Noe . Sensitivity comparison of coherent optical heterodyne, phase diversity, and polarisation diversity receivers. J. Optical Commun. , 1 , 11 - 18
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