Raman spectroscopy with stabilized multi-mode lasers
First Claim
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1. A Raman spectroscopy apparatus for measuring a property of a sample, the apparatus comprising:
- a multi-mode laser for irradiating a sample to produce a Raman spectrum, a grating positioned to receive and filter radiation from the multi-mode laser;
a dispersion element positioned to receive and separate scattered radiation into different wavelength components, a detection array, optically aligned with the dispersion element for detecting at least some of the wavelength components of the scattered light, and a processor for processing data from the detector array to measure a property of the sample, wherein the apparatus provides a Raman spectrometer having a resolution of less than about 10 cm−
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Abstract
Methods and apparatus for analysis of a sample using Raman spectroscopy, which employs a multi-mode radiation source and a spectral filter, are disclosed. The source radiation produces a Raman spectrum consisting of scattered electromagnetic radiation that is separated into different wavelength components by a dispersion element. A detection array detects a least some of the wavelength components of the scattered light and provides data to a processor for processing the data. The resulting spectroscopic data has higher resolution and stability than conventional low-resolution Raman systems.
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Citations
14 Claims
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1. A Raman spectroscopy apparatus for measuring a property of a sample, the apparatus comprising:
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a multi-mode laser for irradiating a sample to produce a Raman spectrum, a grating positioned to receive and filter radiation from the multi-mode laser;
a dispersion element positioned to receive and separate scattered radiation into different wavelength components, a detection array, optically aligned with the dispersion element for detecting at least some of the wavelength components of the scattered light, and a processor for processing data from the detector array to measure a property of the sample, wherein the apparatus provides a Raman spectrometer having a resolution of less than about 10 cm−
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for measuring a property of a sample using low resolution Raman spectroscopy comprising:
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providing a sample;
producing radiation using a multi-mode laser;
passing the produced radiation through a grating that reduces mode-hopping effects and increase stability;
irradiating the sample to produce a Raman spectrum consisting of scattered electromagnetic radiation;
receiving and separating the scattered radiation into different wavelength components using a dispersion element;
detecting at least some of the wavelength components of the scattered light using a detection array; and
processing data from the detector array and calculating information about the sample with a processor.
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Specification