A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and a second waveguide, forms a cavity resonator with the DFB region. A tuning voltage applied to the composite...http://www.google.fr/patents/US5991323?utm_source=gb-gplus-shareBrevet US5991323 - Laser transmitter for reduced signal distortion
