Patent ID: 7184671

Claim:
An optical transmission controller, comprising: a temperature controller, operative to digitally control the temperature of a laser module, wherein the temperature controller includes: a temperature detection circuit to receive signals from a temperature detector in the laser module and provide a temperature signal, a temperature control circuit coupled to receive the temperature signal from the temperature detection circuit and provide a control signal, an output driving circuit coupled to receive the control signal and provide a driving signal; a modulator bias controller coupled to digitally control the DC voltage levels applied to an optical modulator; an optical power controller, operative to digitally control an output power of the optical modulator; a wave-length controller, including: a wavelength receipt circuit coupled to receive signals related to the wavelength of light output by the laser module and generate a wavelength signal; a wavelength control circuit coupled to the wavelength receipt circuit, the wavelength control circuit comparing the wavelength signal with a predetermined wavelength signal to generate a control signal; and a temperature determination circuit coupled to select the predetermined signal in response to the predetermined wavelength signal.