Patent ID: 11862934
Assignee: AUTOMOTIVE COALITION FOR TRAFFIC SAFETY, INC.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 12:
13. A method for generating light of a selected wavelength, the method comprising:
providing a semiconductor laser comprising:
a semiconductor substrate;
a substrate heater for heating the semiconductor substrate;
first and second linearly-aligned ridge waveguides formed on the semiconductor substrate, the first and second linearly-aligned ridge waveguides being separated by a gap so as to form first and second coupled cavities;
first and second ridge waveguide heaters for heating the first and second linearly-aligned ridge waveguides, respectively; and
first and second p-contacts formed on the first and second linearly-aligned ridge waveguides, respectively, and first and second n-contacts in electrical communication with the first and second linearly-aligned ridge waveguides, respectively, for applying first and second laser currents to the first and second linearly-aligned ridge waveguides, respectively;

tuning the wavelength of the semiconductor laser according to the equation

λ=λi+aT+b1I1+b2I2+c1H12+c2H22;

and
adjusting at least one of T, I1, I2 and H1, H2 as necessary so as to generate light a selected wavelength.