SPOT-SIZE CONVERTER, SEMICONDUCTOR LASER MODULE AND OPTICAL FIBER LASER DEVICE USING THE CONVERTER

摘要

A spot size converter (101) comprising an incident area (107) of a first size, an exit area (108) of a second size different from the first size, and side walls defining a light guide, wherein at least a part of side wall inclines from the width direction axis and the thickness direction axis of the incident area is provided. Thereby, it is possible to regulate the divergence of the outgoing light, and to optically couple optical elements of different spot size with each other at a high efficiency. Moreover, the semiconductor laser module and optical fiber laser device using such a spot size converter are provided. IMAGE