Chirped-pulse multiple wavelength telecommunications system
First Claim
1. An optical multiple wavelength apparatus comprisingan optical disperser for receiving short optical pulses at a first rate and forming therefrom a train of chirped optical pulses with each such chirped optical pulse extending over a plurality of time periods, each time period associated with a different optical wavelength channel;
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Abstract
An apparatus and method provides optical multiple wavelength signals using a single optical broadband source to generate many independent optical wavelength channels. An optical transmitter includes a pulse chirping device which separates the frequency components of periodic optical pulses in the time domain forming separate wavelength channels which are separately modulated by a high-speed broadband optical modulator. A receiver includes a passive splitter to separate the individual wavelength channels. The chirped-pulse transmitter can then be conveniently adjusted to provide optimum overlap of wavelength channels with the modulating channel spectra.
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Citations
29 Claims
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1. An optical multiple wavelength apparatus comprising
an optical disperser for receiving short optical pulses at a first rate and forming therefrom a train of chirped optical pulses with each such chirped optical pulse extending over a plurality of time periods, each time period associated with a different optical wavelength channel; - and
an optical modulator encoding an optical wavelength channel of one or more of the time periods of selected ones of the chirped optical pulse train using a data signal operating at a second rate equal to or greater than said first rate to form an encoded optical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of operating an optical multiple wavelength communication system comprising the steps of:
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receiving short optical pulses at a first rate and forming a train of chirped optical pulses having a plurality of time periods, each time period associated with a different optical wavelength channel; encoding the optical wavelength channel of one or more of the time periods of selected ones of the chirped optical pulse train using a data signal operating at a second rate equal to or greater than said first rate; transmitting the resulting encoded optical signal over an optical medium; and receiving over the optical medium and demultiplexing the encoded optical signal into a plurality of modulated optical wavelength channels.
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29. A method of forming optical multiple wavelength signals comprising the steps of:
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receiving short optical pulses at a first rate and forming therefrom a train of chirped optical pulses with each such chirped optical pulse extending over a plurality of time periods, each time period associated with a different optical wavelength channel; and encoding the optical wavelength channel of one or more of the time periods of selected ones of the chirped optical pulse train using a data signal operating at a second rate equal to or greater than said first rate to form an encoded optical signal.
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Specification