Method of determining operation conditions of a laser-based particle detector
US10641695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2019 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Sep 2, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining operating conditions of a particle detector that includes a multimode Vertical Cavity Surface Emitting Laser (VCSEL) includes providing an electrical drive current to the multimode VCSEL such that a laser beam is emitted by the multimode VCSEL and varying the electrical drive current within a predefined range of electrical drive currents. The method further includes determining, as a function of the electrical drive current, an intensity signal of an optical wave within a laser cavity of the multimode VCSEL, determining, as a function of the electrical drive current, a noise measure of the intensity signal, determining a range of electrical drive currents for which the noise measure is below a predefined threshold noise measure value, and determining operating conditions of the particle detector by choosing an electrical drive current for particle detection out of the determined low noise range of electrical drive currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.