Device for distributing a signal for measuring wavelength shifts
US12098936B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 6, 2020 |
| Grant date | Sep 24, 2024 |
| Priority date | — |
| Expiry date | Jul 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2746
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A signal-distributing device that includes an arrayed-waveguide-grating demultiplexer and at least one receiving module. Each receiving module includes a multimode interference coupler and two output waveguides, the multimode interference coupler being located between the arrayed-waveguide-grating demultiplexer and the two output waveguides. The multimode interference coupler is configured to distribute, to the two output waveguides, an optical signal delivered by the arrayed-waveguide-grating demultiplexer. Such a device allows wavelength shifts in the signal delivered by a set of one or more sensors, in particular Bragg grating reflectors inscribed in a given optical fibre, to be measured. It allows a wavelength shift to be measured with a high linearity and a signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.