Patent ID: 6804273
Filing Date: 2004-10-12
Classification: H01S

Abstract:
A controller, coupled to an optical device including an optical source, frequency reference element and a case, the controller comprising:a frequency processing module, coupled to the optical device, adapted to transmit an error signal based upon a difference between an output frequency of the optical source and a reference frequency; a driver module, coupled to the optical device and said frequency processing module, adapted to receive the error signal, to transmit a first signal representing a temperature of the frequency reference element and to transmit a second signal to adjust the frequency of the optical source, the temperature of the frequency reference element being estimated based on at least one of a temperature measurement of the optical source and a temperature measurement of the case; and an offset processing module, coupled to said frequency processing module and said driver module, adapted to receive the first signal and to transmit an offset signal based upon the first signal; wherein said frequency processing module adjusts the error signal, based upon the offset signal, to compensate for the temperature of the frequency reference element.