Data format for high bit rate WDM transmission

  • US 7,860,403 B2
  • Filed: 04/16/2004
  • Issued: 12/28/2010
  • Est. Priority Date: 04/17/2003
  • Status: Active Grant
First Claim
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1. A method of optically encoding data for transmission over a wavelength division multiplexed optical communications system comprising the steps of:

  • generating a periodic series of optical pulses defining a series of time slots, wherein one pulse appears in each time slot;

    filtering the pulses by way of a filter to produce carrier pulses extending over more than one time slot; and

    modulating the pulses with data for transmission;

    whereinfor each of at least some of the carrier pulses, the filter gives rise to the corresponding carrier pulse having a temporal profile with a minimum substantially in the center of each of the time slots adjacent to the time slot for that corresponding carrier pulse, the temporal profile of the corresponding carrier pulse further having an oscillating tail that extends from the minimum into at least one time slot that is even further from the time slot for the corresponding carrier pulse.

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