发明名称 |
Distributed feedback semiconductor laser device and laser module |
摘要 |
Disclosed is a distributed feedback semiconductor laser device having a resonator for oscillating a laser beam and a laser module which is provided with the semiconductor laser device. The semiconductor laser device comprises a diffraction grating, formed inside the resonator, for periodically changing only an extinction coefficient k or both a real refractive index n and the extinction coefficient k in a complex refractive index N expressed by N=n-ik where i is an imaginary unit. The resonator has a first facet having a first reflectance and a second facet opposite to the first facet and having a second reflectance. The first reflectance is smaller than the second reflectance and equal to or larger than 10%, preferably equal to or smaller than 20%.
|
申请公布号 |
US2003039285(A1) |
申请公布日期 |
2003.02.27 |
申请号 |
US20020195104 |
申请日期 |
2002.07.15 |
申请人 |
THE FURUKAWA ELECTRIC CO., LTD. |
发明人 |
YATSU RYOSUKE;FUNABASHI MASAKI;KASUKAWA AKIHIKO |
分类号 |
G02B6/42;H01S5/022;H01S5/12;(IPC1-7):H01S5/00;H01S3/08 |
主分类号 |
G02B6/42 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|