Patent ID: 6658033
Filing Date: 2003-12-02
Classification: H01S

Abstract:
A method of evaluating a tuneable laser and determining suitable laser operation points, wherein the laser includes two or more tuneable sections in which injected current can be varied, said sections including at least one reflector section and one phase section, said method comprising the steps of: varying the current injected through the reflector section at different constant currents injected through respective remaining tuneable sections; measuring the laser power output at one of the front and the rear mirror of the laser; sweeping the reflector current in one direction and then in the opposite direction back to its starting value while measuring and storing the power; calculating the power difference with one and the same reflector current, but in said different sweep directions; and detecting and storing as hysteresis-free current combinations those combinations which give rise to a power difference that falls below a predetermined level.