Temperature control of an optical device

A control system included in a device having at least one of (i) a tunable optical transmitter configured to selectively generate a first optical signal at one of a plurality of preselected wavelengths or (ii) an optical receiver coupled to a tunable optical bandpass filter configured to selectively pass a second optical signal at one of a plurality of preselected wavelengths, wherein the control system is configured to:

• receive one or more temperature-indicative measurements from a plurality of corresponding sensors including a first sensor and a second sensor, wherein the first sensor senses an ambient temperature at a location of the device, and wherein the second sensor senses a property of the tunable optical transmitter or the tunable optical bandpass filter other than temperature that is indicative of a temperature of the tunable optical transmitter or the tunable optical bandpass filter;
• transmit a first control signal to a first temperature control circuit to control a temperature of the device within a first range of temperatures based on the temperature-indicative measurements received from the first sensor;
• and
• transmit a second control signal to a second temperature control circuit to control a temperature of the tunable optical transmitter or the tunable optical bandpass filter within a second range of temperatures based on one of the temperature-indicative measurements received from the second sensor, wherein the second range of temperatures is narrower than the first range of temperatures.

A method for controlling a device having at least one of (i) a tunable optical transmitter configured to selectively generate a first optical signal at one of a plurality of preselected wavelengths or (ii) an optical receiver coupled to a tunable optical bandpass filter configured to selectively pass a second optical signal at one of a plurality of preselected wavelengths, wherein the method comprises:

• receiving one or more temperature-indicative measurements from one or more corresponding sensors including a first sensor and a second sensor, wherein the first sensor senses an ambient temperature at a location of the device, and wherein the second sensor senses a property of the tunable optical transmitter or the tunable optical bandpass filter other than temperature that is indicative of a temperature of the tunable optical transmitter or the tunable optical bandpass filter;
• transmitting a first control signal to a first temperature control circuit to control a temperature of the device within a first range of temperatures based on the temperature-indicative measurements received from the first sensor;
• and
• transmitting a second control signal to a second temperature control circuit to control a temperature of the tunable optical transmitter or the tunable optical bandpass filter within a second range of temperatures based on one of the temperature-indicative measurements received from the second sensor, wherein the second range of temperatures is narrower than the first range of temperatures.