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US 2007/0166039 A1Published application
Integrated optical transmitter
OwnerRobert Spagnoletti, James Whiteawayinventors
Life of this patent
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Abstract
A wavelength division multiplex integrated optical transmitter and optical transmission system employing narrow band filters to dramatically improve tolerance to chromatic dispersion and thereby enable increased reach and/or data rates and a method of offering a communication service using such a transmitter or system.
Claims14
A wavelength division multiplex transmitter array and multiplexer comprising:
- a plurality of semiconductor lasers, each laser being arranged to output at a different central optical wavelength;
- a wavelength selective device arranged to combine the outputs of the lasers;
- and
- a corresponding plurality of narrow band optical filters, each filter being coupled to a respective laser and having a band center wavelength offset from the central optical wavelength of the respective laser.
1 more element
A wavelength division multiplex transmitter array and multiplexer comprising:
- an array of semiconductor lasers, each laser being arranged to output at a different wavelength;
- a wavelength selective device arranged to combine the outputs of the lasers
- a control system to maintain the wavelengths of the individual lasers such that under high speed modulation a significant amount of the laser's output spectrum does not pass through the wavelength selective device to the main output.
An optical transmission system comprising:
- a wavelength division multiplex transmitter array and multiplexer comprising a plurality of semiconductor lasers, each laser being arranged to output at a different central optical wavelength, and a wavelength selective device arranged to combine the outputs of the lasers;
- and
- a corresponding plurality of narrow band optical filters, each filter being coupled to a respective laser and having a band center wavelength offset from the central optical wavelength of the respective laser.
Dependencies are inferred from the claim text.