Compact, low cost Raman monitor for single substances
AssigneePD-LD, Inc.
InventorsBoris Leonidovich Volodin, Vladimir Sinisa Ban
Life of this patent
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Abstract
Apparatus for performing Raman spectroscopy may include a first laser source having a first emission wavelength and a second laser source having a second emission wavelength. A separation between the first and second emission wavelengths may correspond to a width of a Raman band of a substance of interest. An optical switch may provide switching between the first and second laser sources. An ensemble of individually addressable laser emitters may be provided. A Bragg grating element may receive laser light from the ensemble. An optical system may direct light from the Bragg grating element into an optical fiber. A combined beam through the optical fiber may contain light from each of the emitters.
Claims20
Apparatus for performing Raman spectroscopy, the apparatus comprising:
- a first laser source having a first emission wavelength;
- a second laser source having a second emission wavelength, wherein a separation between the first and second emission wavelengths corresponds to a width of a Raman band of a substance of interest;
- and
- an optical switch that provides switching between the first and second laser sources.
Apparatus for performing Raman spectroscopy, the apparatus comprising:
- an ensemble of individually addressable laser emitters, the ensemble comprising a first laser emitter that emits laser light having a first wavelength and a second laser emitter that emits laser light having a second wavelength, wherein a separation between the first and second wavelengths corresponds to a width of a Raman band of a substance of interest;
- a Bragg grating element that receives the laser light from the laser emitters, the Bragg grating element comprising a three-dimensional bulk of optical material having recorded therein a first Bragg grating having a first period and a second Bragg grating having a second period;
- and
- an optical system that directs light from the first and second Bragg gratings into an optical fiber,
- wherein a combined beam through the optical fiber contains light from each of the first emitter and the second emitter.
Dependencies are inferred from the claim text.