Patent ID: 8818194
Filing Date: 2014-08-26
Classification: H04J

Abstract:
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, the memory being selected from the group consisting of a read only memory and a random access memory, 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, 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; and a heater, wherein the optical demultiplexer includes an optical de-interleaver and wherein the heater is thermally coupled to the optical de-interleaver and the control signal includes a first electrical current or a second electrical current, the control signal being supplied to the heater, such that, when the control signal includes the first electrical current, the optical demultiplexer has a first temperature and a first transmission characteristic, and, when the control signal includes the second electrical current, the optical demultiplexer has a second temperature and a second transmission characteristic.