Patent ID: 6917632
Filing Date: 2005-07-12
Classification: H01S,H04B

Abstract:
1. An apparatus, comprising: a control unit to produce a digital reference signal; a digital-to-analog converter, coupled to the control unit, to convert the digital reference signal to an analog reference signal; a tunable optical device having an optical path, the tunable optical device coupled to the digital-to-analog converter to modulate an optical length of the optical path in response to the analog reference signal; a detector, coupled to the tunable optical device, to output an analog feedback signal corresponding to the analog reference signal; an amplifier coupled to the detector to amplify the analog feedback signal; a first filter coupled to the amplifier to filter the analog feedback signal; and an analog-to-digital converter, coupled to the filter, to convert the analog feedback signal to a digital feedback signal, the digital feedback signal received by the control unit, wherein the control unit is further to produce a tuning signal for wavelength locking of the tunable optical device.