Patent ID: 9397746
Filing Date: 2016-07-19
CPC Classification: H01S,H04B,H04J

Claim Text:
1. A method for a semiconductor chip, the method comprising: the semiconductor chip includes an intra-cavity optical bandpass filter which is coupled to a modulator which is coupled to a WDM multiplexer; executing, by a microcontroller, a self-calibration routine for calibrating to a wavelength division multiplexing (WDM) multiplexer of the semiconductor chip, wherein the self-calibration routine includes: driving the modulator to maximize transmission through the modulator; stepping up electrical power to the intra-cavity optical band-pass filter while monitoring transmission through the WDM multiplexer in order to store a maximum recorded transmission and a current transmission through the WDM multiplexer, wherein the WDM multiplexer has a WDM multiplexer pass band; when the current transmission through the WDM multiplexer has fallen by more than a predefined amount relative to the maximum recorded transmission, stepping up the electrical power to the intra-cavity optical band-pass filter until the current transmission is restored to the predefined amount of the maximum recorded transmission, thereby determining self-calibration parameters for a blue edge of the WDM multiplexer pass band; when the current transmission through the WDM multiplexer has not fallen by more than the predefined amount relative to the maximum recorded transmission, stepping up the electrical power to the intra-cavity optical band-pass filter until the current transmission falls to the predefined amount of the maximum recorded transmission, thereby determining the self-calibration parameters for a red edge of the WDM multiplexer pass band; and storing the self-calibration parameters in memory.