Optical multiplexing method and optical multiplexer, and optical amplifier using same
US7127139B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2004 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Dec 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0941
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An object of the invention is to provide an optical multiplexing method and an optical multiplexer, capable of fixing lights of different wavelengths at required wavelengths to stably multiplex them with a simple optical circuit configuration. To this end, in the present optical multiplexer, there is provided a tilted FBG, which is formed on an optical fiber through which a first light is propagated, with a grating direction thereof being tilted to an axial direction of the optical fiber, and has the sufficiently high reflectance to a second light (multiplexed light) of a wavelength different from that of the first light. The multiplexed light emitted from a light source is irradiated to the tilted FBG, via a free space from an angle direction determined according to a grating pitch of the tilted FBG and the wavelength of the multiplexed light, to be coupled within the optical fiber. Further, a low reflective FBG reflecting light coupled within the optical fiber is formed on the optical fiber, to achieve a resonance structure between the low reflective FBG and the light source, thereby stabling the wavelength of the multiplexed light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.