Control circuit for optoelectronic module with integrated temperature control

Temperature control circuitry for a laser emitter disposed within a housing of an optoelectronic assembly comprising:

• an integrated circuit disposed within the housing including:
• logic to generate a temperature control value associated with a target temperature for the laser emitter;
• a proportional integral differential controller to generate a pulse width modulated signal having a pulse width corresponding to the temperature control value;
• and
• a filter coupled to the integrated circuit and configured to:
• filter the pulse width modulated signal;
• and
• provide the filtered pulse width modulated signal to a temperature control mechanism to set temperature of the laser emitter to the target temperature.

A method for controlling temperature of a laser emitter disposed within a housing of an optoelectronic assembly, the method comprising:

• receiving a plurality of analog signals from the laser emitter;
• converting the analog signals into digital values;
• storing the digital values in predefined locations in one or more memory arrays of an integrated circuit disposed within the housing;
• and
• generating control signals to control the temperature of the laser emitter in accordance with one or more digital values stored in the one or more memory arrays.

A method for calibrating an optoelectronic assembly, the method comprising:

• setting an ambient temperature of the optoelectronic assembly to a first predefined value;
• sending control signals to a temperature control mechanism disposed inside a housing to vary an operating temperature of a laser emitter of the optoelectronic assembly;
• monitoring an operating parameter of the temperature control mechanism and a wavelength of the optical signals from the laser emitter as the operating temperature varies;
• when the wavelength equals a predefined target wavelength, storing a current value of the operating parameter in a memory device of the optoelectronic assembly in association with the first predefined value of the ambient temperature.

A method for calibrating an optoelectronic assembly, the method comprising:

• setting a laser bias current of a laser emitter disposed within the optoelectronic assembly to a first predefined value;
• sending control signals to a temperature control mechanism disposed inside a housing to vary an operating temperature of a laser emitter of the optoelectronic assembly when the laser emitter operates at the first predefined value of the laser bias current;
• monitoring an operating parameter of the temperature control mechanism and a wavelength of the optical signals from the laser emitter as the operating temperature varies;
• when the wavelength equals a predefined target wavelength, storing a current value of the operating parameter in a memory device of the optoelectronic assembly in association with the first predefined value of the laser bias current.