公开(公告)号：US06724799B2

公开(公告)日：2004-04-20

申请号：US10177955

申请日：2002-06-20

Applicant: Sang-wan Ryu ,  Je-ha Kim

Inventor： Sang-wan Ryu ,  Je-ha Kim

IPC: H01S308

CPC classification number: H01S5/146 ,  H01S5/0224 ,  H01S5/02248 ,  H01S5/06256 ,  H01S5/1014

Abstract: A wavelength tunable laser light source necessary for a Wavelength Division Multiplexing (WDM)-based optical communication system, and more particularly, a wavelength tunable laser light source for maintaining a stable wavelength without a wavelength locker is provided. The wavelength tunable laser includes an optical fiber and a semiconductor device. The optical fiber can implement multiple reflection peaks. The semiconductor device includes a mode size converter section, a gain section and a DBR mirror section. One facet of the semiconductor device, which is adjacent to the optical fiber, has an antireflection coating layer. Therefore, the wavelength tunable laser based on an optical fiber containing multiple reflection peaks can maintain excellent wavelength stability insensitive to current injection, temperature, and environments without a wavelength locker.

Abstract translation: 提供了一种用于基于波分复用（WDM）的光通信系统所需的波长可调激光光源，更具体地，提供了用于在没有波长锁定器的情况下保持稳定波长的波长可调激光光源。 波长可调激光器包括光纤和半导体器件。 光纤可以实现多个反射峰。 半导体器件包括模式尺寸转换器部分，增益部分和DBR反射镜部分。 与光纤相邻的半导体器件的一个面具有抗反射涂层。 因此，基于含有多个反射峰的光纤的波长可调激光器可以保持对电流注入，温度和环境无敏感的优良波长稳定性，而不需要波长锁定器。

公开(公告)号：US06594298B2

公开(公告)日：2003-07-15

申请号：US10003294

申请日：2001-12-06

Applicant: Sang-Wan Ryu ,  Je Ha Kim

Inventor： Sang-Wan Ryu ,  Je Ha Kim

IPC: H01S319

CPC classification number: H01S5/12 ,  H01S5/1209 ,  H01S5/1215 ,  H01S5/4031 ,  H01S5/4087

Abstract: A laser resonator is implemented by using the −1-st order reflection peaks of a sampled grating so that the multi-wavelength single mode light source array can be manufactured easily and economically. A multi-wavelength semiconductor laser array comprises a substrate; a plurality of laser stripes arranged with a predetermined space on the substrate, each being divided into two sections; a multiplicity of asymmetric sampled gratings distributed with sampling periods different from each other on the bottom of each active layer; and a number of effective refractive index changing layers, each arranged on one section of each laser stripe to make the Bragg wavelengths different at the two sections.