TUNABLE OPTICAL DEMULTIPLEXER
First Claim
1. An optical device, comprising:
- an optical demultiplexer; and
a control circuit coupled to the optical demultiplexer, the control circuit including a memory configured to store first and second parameter values,wherein, in response to a first input to the control circuit, the control circuit generates a first control signal based on the first parameter value, and, in response to the first control signal, the optical demultiplexer has a first transmission characteristic, which includes a first plurality of transmission maxima, each of which corresponding to a first plurality of wavelengths, each of the first plurality of wavelengths being separated from one another by a spectral spacing and conforming to a first wavelength grid, andin response to a second input to the control circuit, the control circuit generates a second control signal based on the second parameter value, and, in response to the second control signal, the optical demultiplexer has a second transmission characteristic, which includes a second plurality of transmission maxima, each of which corresponding to a second plurality of wavelengths, each of the second plurality of wavelengths being separated from one another by the spectral spacing and conforming to a second wavelength grid, the second wavelength grid being spectrally shifted relative to the first wavelength grid.
1 Assignment
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Accused Products
Abstract
A tunable optical demultiplexer includes a control circuit and one or more heaters thermally coupled to waveguides of an optical demux. The control circuit is in signal communication with the one or more heaters and includes a processor coupled to a memory. The control circuit is configured to receive an optical channel group (OCG) identification signal and adjust the power delivered to the heaters in response to the OCG identification signal and based on parameter values stored in the memory. The optical demux outputs a plurality of optical signals at a corresponding one of a plurality of outputs. The transmission characteristics of the optical demux are varied depending on the amount of power delivered to the heaters. The varying of the transmission characteristics of the optical demux adjusts the spectral shifting of the plurality of wavelengths output by the optical demux.
22 Citations
19 Claims
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1. An optical device, comprising:
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an optical demultiplexer; and a control circuit coupled to the optical demultiplexer, the control circuit including a memory configured to store first and second parameter values, wherein, in response to a first input to the control circuit, the control circuit generates a first control signal based on the first parameter value, and, in response to the first control signal, the optical demultiplexer has a first transmission characteristic, which includes a first plurality of transmission maxima, each of which corresponding to a first plurality of wavelengths, each of the first plurality of wavelengths being separated from one another by a spectral spacing and conforming to a first wavelength grid, and in response to a second input to the control circuit, the control circuit generates a second control signal based on the second parameter value, and, in response to the second control signal, the optical demultiplexer has a second transmission characteristic, which includes a second plurality of transmission maxima, each of which corresponding to a second plurality of wavelengths, each of the second plurality of wavelengths being separated from one another by the spectral spacing and conforming to a second wavelength grid, the second wavelength grid being spectrally shifted relative to the first wavelength grid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical device, comprising:
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an optical demultiplexer including a plurality of outputs; and a control circuit including a memory configured to store first and second parameter values, the control circuit in signal communication with the optical demultiplexer, wherein, in response to a first input to the control circuit, the control circuit generates a first control signal based on the first parameter value, and, in response to the first control signal, the optical demultiplexer outputs a first plurality of optical signals at a corresponding one of the plurality of outputs, each of the plurality of optical signals has a corresponding one of a first plurality of wavelengths, each of the first plurality of wavelengths being separated from one another by a spectral spacing and conforming to a first wavelength grid, and in response to a second input to the control circuit, the control circuit generates a second control signal based on the second parameter value, and, in response to the second control signal, the optical demultiplexer outputs a second plurality of optical signals at a respective one of the plurality of outputs, each of the second plurality of optical signals corresponding to one of a second plurality of wavelengths, each of the second plurality of wavelengths being separated from one another by the spectral spacing and conforming to a second wavelength grid, the second wavelength grid being spectrally shifted relative to the first wavelength grid. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An optical device, comprising:
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an Mach Zehnder Interferometer having a first and second waveguides; a control circuit coupled to the optical demultiplexer, the control circuit including a memory configured to store first and second parameter values; a heater coupled to the first waveguide of the Mach Zehnder interferometer, wherein, in response to a first input to the control circuit, the first parameter value is retrieved from the memory corresponding to a first power level supplied from the control circuit to the heater such that the Mach Zehnder interferometer demultiplexes a first group of channels having a first spectral spacing; and in response to a second input to the control circuit, the second parameter value is retrieved from the memory corresponding to a second power level supplied from the control circuit to the heater such that the Mach Zehnder interferometer demultiplexes a second group of channels having a second spectral spacing.
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Specification