Bulk modulation of multiple wavelengths for generation of CATV optical comb
AssigneeLG-Ericsson Co., Ltd.
InventorDouglas James Beckett
Life of this patent
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Abstract
A system for generating an optical CATV comb comprising a plurality of wavelength division multiplexed (WDM) optical CATV signals. A set of one or more lasers generate a plurality of narrow-band continuous wave (CW) lights, each CW light having a respective predetermined wavelength and optical power level. An optical MUX couples the plurality of CW lights into a WDM continuous wave light. A broadband optical modulator responsive to a CATV signal modulates the WDM continuous wave light to generate the optical CATV comb.
Claims6
A system for generating an optical cable television (CATV) comb having a plurality of wavelength division multiplexed (WDM) optical signals, the system comprising:
- a first number of multi-channel quantum dot lasers for generating a plurality of narrow-band continuous wave (CW) lights, each CW light having a respective predetermined wavelength and optical power level;
- and
- a broadband optical modulator responsive to a second number of (CATV) signals for modulating the plurality of CW lights to generate the optical CATV comb, wherein:
- the wavelength of each CW light corresponds to a different CATV channel,
- the first number of multi-channel quantum dot lasers is more than one,
- the first number of multi-channel quantum dot lasers is less than the second number of CATV signals, and
- at least two of the modulated CW lights corresponding to different channels have different optical power levels.
A system for generating an optical cable television (CATV) comb having a plurality of wavelength division multiplexed (WDM) optical signals, the system comprising:
- a single multi-channel quantum dot laser configured to generate a plurality of continuous wave (CW) lights, each of the CW lights corresponding to a different wavelength and each wavelength corresponding to a respective one of a plurality of CATV channels;
- and
- a modulator coupled to modulate the plurality of CW lights output from the single multi-channel quantum dot laser, wherein:
- the modulator modulates the CW lights with different data signals,
- the single multi-channel quantum dot laser is the only laser that generates the CW lights for the CATV channels within at least a predetermined channel plan, and
- the modulated CW lights are formed into a WDM continuous wave light without use of a multiplexer.
Dependencies are inferred from the claim text.