Patent ID: 7359648
Filing Date: 2008-04-15
Classification: H01S

Abstract:
1. A method of characterizing a tunable semiconductor laser diode, comprising the steps of: passing at least part of the output power of said laser diode through a wavelength discriminating device; adjusting the tuning current of at least one section of said laser diode; performing measurements of the transmission of said output power through said wavelength discriminating device as a function of said tuning current; calculating from said measurements, a tuning current for characterizing said section of said laser diode, said output power as a function of said tuning current having the form of a plurality of steps, said calculating comprising the steps of: determining the center points of at least two of said steps in said measured output power; fitting a curve having properties similar to that of the wavelength response of said wavelength discriminating device through said center points of said steps; and determining the tuning current of said section at a predetermined point of said fitted curve.