Distributed bragg reflector diode laser for Raman excitation and method for use
US5856869A · kind A · utility
39Cited by
2References
15Claims
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Key dates
| Filing date | May 29, 1996 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | May 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2835
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distributed Bragg reflector (DBR) diode laser is used as excitation source for fiber optic Raman spectroscopy utilizing charge coupled device (CCD) detection and an image-corrected spectrograph. The DBR diode laser is superior to index guided diode lasers (Fabry-Perot) for elimination of mode hopping, elimination of frequency hysteresis as a function of both temperature and current changes, and reduction in laser broadband emission. These advantages allow the DBR laser to be used in industrial process control applications which are too demanding for index guided diode lasers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.