Background removal from Raman spectra by an intracavity active-tuning element for a laser
US9905990B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2015 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0823
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system, apparatus, and method for multiple wavelength Raman interrogation laser generation and Raman spectra acquisition. An intracavity laser tuning subsystem is integrated into the laser cavity. The tuning subsystem allows switching between at least two laser output frequencies in a manner effective for good identification and separation of Raman spectra from non-Raman spectra, including auto-fluorescence from the sample and background. The tuning subsystem can be implemented in different ways in the cavity. It does not require material alteration of the line-narrowing components. Also, processing of acquired raw signal from the multiple wavelength interrogation can further assist effective Raman spectra identification and separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.