Tunable light source cavity detection using a plurality of axial-plus-transverse modes
US10724946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2018 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Feb 2, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0622
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatuses, methods, and systems for detecting a substance are disclosed. One system includes a light source, an optical cavity, a cavity detector, and a processor. The light source generates a beam of electro-magnetic radiation, wherein a wavelength of the beam of electro-magnetic radiation is tuned to operate at multiple wavelengths. The optical cavity receives the beam of electro-magnetic radiation, wherein the physical characteristics of the cavity define a plurality of allowed axial-plus-transverse electro-magnetic radiation modes, wherein only a subset of the allowed axial-plus-transverse electro-magnetic radiation modes are excited when the optical cavity receives the beam of electro-magnetic radiation. The cavity detector senses electro-magnetic radiation emanating from the optical cavity. The processor operates to receive information relating to the sensed electro-magnetic radiation, and detects the substance within the optical cavity based on amplitude and/or phase of the sensed electro-magnetic radiation emanating from the optical cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.