Maintaining desirable performance of optical emitters at extreme temperatures

A method of maintaining desirable optical performance of a laser of an optoelectronic apparatus at extreme temperatures, the method comprising:

• determining a predefined range of temperatures having a high temperature cut-off and a low temperature cut-off, the predefined range of temperatures corresponding to operation of the laser to generate optical signals at a first predefined level and a first predefined extinction ratio;
• determining a first bias current and a first current swing, corresponding to a first temperature within the predefined range of temperatures, at which the laser generates optical signals at the first predefined level and the first predefined extinction ratio;
• determining a second bias current and a second current swing, corresponding to a second temperature outside the predefined range of temperatures, at which the laser generates optical signals at a second predefined level and a second predefined extinction ratio;
• and
• storing, in the optoelectronic apparatus, the first bias current and the first current swing correlated to the first temperature, and the second bias current and the second current swing correlated to the second temperature;
• wherein:
• when the second temperature is less than the low temperature cut-off of the predefined range of temperatures, the second predefined level and the second predefined extinction ratio are defined to be greater than the first predefined level and the first predefined extinction ratio, respectively, in proportion to a difference between the second temperature and the low temperature cut-off;
• when the second temperature is greater than the high temperature cut-off of the predefined range of temperatures, the second predefined level and the second predefined extinction ratio are defined to be less than the first predefined level and the first predefined extinction ratio, respectively, in proportion to a difference between the second temperature and the high temperature cut-off.

An optoelectronic apparatus comprising:

• an optical emitter;
• an emitter driver circuit coupled to drive the optical emitter;
• a controller circuit coupled to the emitter driver circuit, the controller circuit configured to provide control signals to the emitter driver circuit to maintain consistent optical performance of the optical emitter over a predefined range of temperatures, and to deviate from consistent optical performance utilizing a specified deviation methodology for temperatures outside of the predefined range of temperatures;
• and
• a memory coupled to the controller circuit and having stored therein temperature values and at least two control values for the emitter driver circuit for at least some temperature values;
• wherein the controller circuit generates the control signals based at least in part on two of the control values that are associated with the same temperature value in the memory.