Waveguide structure
US7492978B2 · kind B2 · utility
2Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2002 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Feb 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12138
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A novel single point leaky waveguide structure and its use as an optical sensor for the detection of particles is disclosed. The waveguide structure is fabricated to increase the overlap of the evanescent field extension from the sensor surface with particles in the bulk solution of a flowing system so as to place most of the volume of the particles within the evanescent field. Increasing the overlap of the evanescent field with the particles and permitting mode propagation along the direction of flow for a few millimetres provides an effective interrogation approach for multiple particle detection in a single flow channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.