Patent ID: 9590135
Date: 2017-03-07
CPC Classifications: G02B,H01L,H01S

Claim:
1. An SLD (superluminescent diode) that is a light source of a wavelength tunable laser, the SLD comprising: a first epi layer formed on top of an SI (semi-insulating substrate); a butt layer grown based on at least a portion of the first epi layer; a tapered SSC (spot size converter) formed on the butt layer; an optical waveguide formed on an active area that is based on the first epi layer and on an SSC area that is based on the tapered SSC; an RWG formed on the optical waveguide; a polyimide layer on one side of the RWG in the active area; a p-type electrode formed on an upper portion of the RWG; and an n-type electrode formed next to the RWG.