초록 ▼

A cavity enhanced optical detector comprising: i) a source of continuous wave laser light; ii) a high finesse resonant cavity comprising at least three spaced apart, high-reflectivity mirrors positioned to receive light from the laser light source; iii) at least one photo-detector for measuring the

A cavity enhanced optical detector comprising: i) a source of continuous wave laser light; ii) a high finesse resonant cavity comprising at least three spaced apart, high-reflectivity mirrors positioned to receive light from the laser light source; iii) at least one photo-detector for measuring the extinction coefficient of an analyte that is positioned in the resonant cavity; and iv) one or more additional photo-detectors for measuring the intensity of fluorescence emission and/or Raman scattering from the analyte.

대표청구항 ▼

The invention claimed is: 1. A cavity enhanced optical detector comprising: i) a source of CW laser light; ii) a high finesse resonant cavity comprising at least three spaced apart, high-reflectivity mirrors, to receive light from the laser light source; iii) at least one photo-detector for measuri

The invention claimed is: 1. A cavity enhanced optical detector comprising: i) a source of CW laser light; ii) a high finesse resonant cavity comprising at least three spaced apart, high-reflectivity mirrors, to receive light from the laser light source; iii) at least one photo-detector for measuring an extinction coefficient of an analyte that is positioned in the resonant cavity; and iv) at least a second photo-detector for measuring intensity of fluorescence emission from the analyte. 2. A cavity enhanced optical detector in accordance with claim 1, further comprising at least a third photo-detector for measuring a light scattering coefficient of said analyte. 3. A cavity enhanced optical detector in accordance with claim 1, wherein said resonant cavity comprises four mirrors in a bow-tie configuration. 4. A cavity enhanced optical detector in accordance with claim 3, wherein a first and second of said mirrors are planar and a third and fourth of said mirrors are plano-concave. 5. A cavity enhanced optical detector in accordance with claim 3, wherein all four of said mirrors are plano-concave. 6. A cavity enhanced optical detector in accordance with claim 1, configured as a cavity ring-down spectrometer. 7. A cavity enhanced optical detector in accordance with claim 1, wherein said extinction coefficient and said intensity of said analyte are measured substantially simultaneously. 8. A cavity enhanced optical detector in accordance with claim 1, further comprising detection means for measuring Raman scattering by said analyte of light provided by said source. 9. A cavity enhanced optical detector in accordance with claim 8, wherein said detection means comprises a CCD array. 10. A cavity enhanced optical detector in accordance with claim 1, wherein said analyte is contained in a container having a volume smaller than a volume of said cavity. 11. A cavity enhanced optical detector in accordance with claim 10, wherein said container is a Brewster Cell. 12. A cavity enhanced optical detector in accordance with claim 1, wherein said at least one detector for measuring said extinction coefficient is a photo-diode. 13. A cavity enhanced optical detector in accordance with claim 1, wherein said detector for measuring said intensity of said fluorescence emission is at least one of a photo multiplier tube and an avalanche photo-diode. 14. A cavity enhanced optical detector in accordance with claim 2, wherein said detector for measuring said scattering coefficient is at least one of a photo multiplier tube and an avalanche photo-diode. 15. A cavity enhanced optical detector in accordance with claim 2, wherein said at least one detector for measuring said fluorescence emission is a first plurality of detectors, and said at least said third detector for measuring said scattering coefficient is a second plurality of detectors. 16. A cavity enhanced optical detector in accordance with claim 2, wherein said at least said third detector for measuring said scattering coefficient of said analyte is a plurality of detectors, wherein at least a first of the plurality of the detectors is positioned to measure forward scattering and at least a second of the plurality of detectors is positioned to measure back scattering. 17. A cavity enhanced optical detector in accordance with claim 1, wherein said photo-detector for measuring said intensity of said fluorescence emission further comprises a fixed frequency filter. 18. A cavity enhanced optical detector in accordance with claim 1, wherein said photo-detector for measuring said intensity of said fluorescence emission further comprises a filter having a pass frequency that can be varied. 19. A cavity enhanced optical detector in accordance with claim 1, further comprising a dispersive element and detector array for measuring said intensity of said fluorescence emission. 20. A cavity enhanced optical detector comprising: i) a source of CW laser light; ii) a high finesse resonant cavity comprising at least three spaced apart, high-reflectivity mirrors, to receive light from the laser light source; iii) at least one photo-detector for measuring an extinction coefficient of an analyte that is positioned in the resonant cavity; iv) at least a second photo-detector for measuring intensity of Raman scattering from the analyte.