Patent ID: 9172212
Filing Date: 2015-10-27
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser diode, comprising: a first reflector including a plurality of segments each having a space region and a grating region alternately arranged along an optical axis of said laser diode, each said grating region including a diffraction grating, and each said space region including no diffraction grating and being disposed between said grating regions, said segments forming a sampled grating; a first waveguide core optically coupled with said first reflector, said waveguide core including a gain region and a tuning region, said gain region including one of said grating regions, and said tuning region including another one of said grating regions neighboring said one of said grating regions included in said gain region, said one of said grating regions in said gain region and said another one of said grating regions in said tuning region having a same pitch; and an electrode on said tuning region, said electrode covering at least one of said space regions that is between said one of said grating regions and another one of said grating regions and that is adjacent to said another one of said grating regions, wherein said gain region forms a butt joint at its interface with said tuning region, and wherein said space region covered by said electrode has an length which varies with current injected from said electrode to determine an emission wavelength of said semiconductor laser diode.