Compact, low cost raman monitor for single substances

摘要

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. A 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.

主权项

1. Apparatus for performing Raman spectroscopy, the apparatus comprising:
an ensemble of individually addressable laser emitters, the ensemble being adapted to emit first laser light having a first wavelength and second 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 is adapted to receive the first laser light and the second laser light, 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 is adapted to form a combined beam that contains light at each of the first and second wavelengths.