Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter
First Claim
1. A multi-wavelength optical modulation circuit, comprising:
- a wavelength-group demultiplexer that receives multi-wavelength light having a plurality of wavelengths and demultiplexes the multi-wavelength light into wavelength groups formed from the respective plurality of wavelengths;
a plurality of channel demultiplexers that demultiplex each wavelength group into light of the respective wavelengths;
a plurality of optical modulators that modulates the light of respective wavelengths demultiplexed by the channel demultiplexers with transmission signals;
a plurality of channel multiplexers that multiplex the modulated signal light of each wavelength output from the optical modulators for each wavelength group; and
a wavelength-group multiplexer that multiplexes the wavelength-division multiplexed signal light of each wavelength group output from each channel multiplexer.
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Accused Products
Abstract
Multi-wavelength light having a frequency band equal to or greater than the FSR of an AWG is demultiplexed into individual wavelength channels, and power level deviations between wavelength channels are suppressed. An optical demultiplexer includes a wavelength-group demultiplexer that demultiplexes multi-wavelength light into wavelength groups formed from wavelength channels, and channel demultiplexers that demultiplex each wavelength group into wavelength channels light. An optical multiplexer includes channel multiplexers that multiplex modulated signal light of each wavelength channel for each wavelength group, and a wavelength-group multiplexer that multiplexes, for each wavelength group, WDM signal light output from the channel multiplexers. The FSR of the wavelength-group multiplexer/demultiplexer is set to be equal to or greater than the frequency band of the multi-wavelength light. The channel multiplexer/demultiplexer is an AWG in which the FSR is approximately the full width at half maximum of the transmission characteristics of each port of the wavelength-group multiplexer/demultiplexer.
52 Citations
32 Claims
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1. A multi-wavelength optical modulation circuit, comprising:
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a wavelength-group demultiplexer that receives multi-wavelength light having a plurality of wavelengths and demultiplexes the multi-wavelength light into wavelength groups formed from the respective plurality of wavelengths;
a plurality of channel demultiplexers that demultiplex each wavelength group into light of the respective wavelengths;
a plurality of optical modulators that modulates the light of respective wavelengths demultiplexed by the channel demultiplexers with transmission signals;
a plurality of channel multiplexers that multiplex the modulated signal light of each wavelength output from the optical modulators for each wavelength group; and
a wavelength-group multiplexer that multiplexes the wavelength-division multiplexed signal light of each wavelength group output from each channel multiplexer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 29, 31, 32)
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14. A wavelength-division multiplexed optical signal transmitter, comprising:
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a multi-wavelength generation light source that generates multi-wavelength light having a plurality of wavelengths; and
a multi-wavelength optical modulation circuit, wherein the multi-wavelength optical modulation circuit is provided with;
a wavelength-group demultiplexer that receives the multi-wavelength light to demultiplex the multi-wavelength light into wavelength groups formed from the respective plurality of wavelengths;
a plurality of channel demultiplexers that demultiplex each wavelength group into light of the respective wavelengths;
a plurality of optical modulators that modulates the light of each wavelength demultiplexed by the channel demultiplexers with transmission signals;
a plurality of channel multiplexers that multiplex the modulated signal light of each wavelength output from the plurality of optical modulators for each wavelength group; and
a wavelength-group multiplexer that multiplexes the wavelength-division multiplexed signal light of each wavelength group output from each channel multiplexer. - View Dependent Claims (22, 28, 30)
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Specification