Simultaneous interrogation of multi wavelength-modulated fiber optical sensors by modulating an arrayed waveguide grating based demultiplexer
US7283692B2 · kind B2 · utility
7Cited by
1References
20Claims
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Key dates
| Filing date | Aug 31, 2005 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12026
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact interrogator for the simultaneous interrogation of multi wavelength-modulated fiber optical sensors, includes a planar waveguide based demultiplexer receiving input signals from the sensors. An array of detectors is coupled to output waveguides of the demultiplexer corresponding to different nominal wavelengths. A tuning element matches the nominal wavelengths of the output waveguide to the input signals from the respective sensors to find the wavelengths of the individual sensors to be interrogated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.