Patent ID: 11870219
Assignee: QUANZHOU SANAN SEMICONDUCTOR TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 0:
1. A laser diode, comprising:
a substrate having a first surface and a second surface that are opposite to each other;
an epitaxial structure that is disposed on said first surface of said substrate and that is formed with a ridge structure on a side of said epitaxial structure opposite to said substrate;
an electrode contacting layer disposed on a top surface of said ridge structure; and
an optical cladding layer having a refractive index smaller than that of said electrode contacting layer, and including a first cladding portion which covers side walls of said ridge structure, and a second cladding portion which is disposed on a portion of said top surface of said ridge structure,
wherein said optical cladding layer and said electrode contacting layer have a total thickness that is an odd multiple of λ/4n, in which λ is a wavelength of a light emitted by said laser diode, and n is an integer not smaller than 1.