Abstract
Raman spectroscopy is an important tool in understanding chemical components of various materials. However, the excessive weight and energy consumption of a conventional CCD-based Raman spectrometer forbids its applications under extreme conditions, including unmanned aircraft vehicles (UAVs) and Mars/Moon rovers. In this article, we present a highly sensitive, shot-noise-limited, and ruggedized Raman signal acquisition using a time-correlated photon-counting system. Compared with conventional Raman spectrometers, over 95% weight, 65% energy consumption, and 70% cost could be removed through this design. This technique allows space- and UAV-based Raman spectrometers to robustly perform hyperspectral Raman acquisitions without excessive energy consumption.
Highlights
Raman spectroscopy is a valuable tool for probing chemical composition
Because acoustooptic tunable filters (AOTFs) only allows one wavelength to transmit at a time, single-point detectors, including photomultiplier tubes (PMTs) and avalanche photodiodes (APDs), could replace the CCD detectors
The angular dispersion provided by AOTFs is usually very tiny
Summary
Raman spectroscopy is an important tool in understanding chemical components of various materials. | | Raman spectroscopy lightweight spectrometer time-correlated | | single-photon counting remote sensing environmental sensing A diffractive grating is usually used to induce a spatial dispersion of the Raman peaks into different wavelengths.
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