Patent ID: 7113525
Filing Date: 2006-09-26
Classification: G01J,H01S

Abstract:
1. A tunable semiconductor laser system comprising: a semiconductor laser, formed on a semiconductor substrate, including an optical gain medium having an index of refraction and an optical path length, the laser producing laser light at a predetermined wavelength; tuning means, coupled to the substrate and responsive to a tuning signal to adjust one of the index of refraction and the optical path length of the optical gain medium to change the predetermined wavelength of the laser light; a micro-resonator structure formed on the semiconductor substrate and optically coupled to the optical gain medium and including an optical sensor configured to provide an electrical output signal, wherein the micro-resonator is configured to resonate when light at a predetermined wavelength propagates through the optical gain medium and to provide the electrical output signal having a peak value in response to light at the predetermined wavelength; and control circuitry coupled the micro-resonator and to the tuning means for providing the tuning signal in response to the output signal of the micro-resonator structure.