Multimode light generating module, semiconductor laser apparatus, and optical fiber amplifier
US6944203B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Nov 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1096
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multimode light generating module comprises an optical cavity and a light-receiving element. The optical cavity is constituted by a semiconductor optical amplification element, and an optical fiber having a grating. The optical fiber comprises a grating having an apodized periodic refractive index distribution, and the slope of the reflection spectrum in a longer wavelength region with respect to the peak wavelength λp is gentler than that in the shorter wavelength region therewith. The grating satisfies the relationship of 0.5 nm>λ0.2−λp>0.1 nm. Here, λ0.2 is defined by λ0.2h-λ0.2l, where λ0.2h is the longer one of two wavelengths exhibiting a relative reflectivity of 0.2 with respect to the maximum reflectivity, and λ0.2l is the shorter one of two wavelengths exhibiting a relative reflectivity of 0.2 with respect to the maximum reflectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.