System and method for molecule sensing using evanescent light coupling approach
US9921164B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2017 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jan 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2551
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and a method for optical sensing of single molecule or molecules in various concentrations are provided. The optical sensor system comprises a first fiber, a second fiber, a light source and a detection device. The first fiber and the second fiber are fused together to form an optical coupler. The first fiber serves as the passageway for the analyte, while the second fiber serves as the waveguide for the light that will interact with the said analyte. One end of the second fiber is connected to the light source (e.g. laser), and the opposite end is connected to the detection device (e.g. spectrometer). The analyte is introduced into the first fiber through one of its ends, and is allowed to flow through inside the hollow core of the said first fiber. When light is delivered through the input end of the second fiber, the evanescent light is formed in the optical coupler and is allowed to interact with the analyte in the first fiber. One scenario in this analyte-light interaction results in, for example, the generation of Raman emission that is used as the probing signal. The spectrum of the Raman emission is analyzed by the detection device to determine the presence of targ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.