Micro-resonator based optical sensor
US7145660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2004 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Jan 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/45
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor system for providing an output signal in response to a sensed parameter is disclosed. The sensor system comprises an optical signal source generating an input signal, a sensing element in optical communication with the optical signal source and a detector in optical communication with the sensing element. The sensing element comprises at least two resonant cavity loops exhibiting a common resonant frequency near at least one frequency of the input signal, at least one of the resonant cavity loops being exposed to an external parameter. The external parameter modifies the resonant frequency of the at least one exposed resonant cavity loop thereby modifying an optical output signal. The detector detects any modification in the output optical signal in response to the sensed parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.