Control circuit for optoelectronic module with integrated temperature control
AssigneeFinisar Corporation
InventorsJames Stewart, Anthony Ho, Andreas Weber, Lucy G. Hosking
Life of this patent
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Abstract
A microprocessor is used to control the temperature of a laser emitter and thereby regulate the wavelength of optical signals from the laser. A serial interface in the microprocessor provides input and output lines to a host device, and temperature lookup tables are stored in nonvolatile memory. Control logic processes information stored in the memory as well as information on operating conditions of the laser emitter to precisely control the temperature of the laser emitter. A thermo-electric cooler adjusts the temperature of the laser emitter.
Claims9
Temperature control circuitry for a laser emitter disposed within a housing of an optoelectronic assembly, the temperature control circuitry comprising an integrated circuit disposed within the housing, wherein the integrated circuit includes:
- logic configured to determine a reference voltage value associated with a target temperature for the laser emitter;
- and
- digital to analog circuitry to convert the reference voltage value to a reference voltage and provide the reference voltage to a temperature control mechanism to set temperature of the laser emitter to the target temperature.
Dependencies are inferred from the claim text.