spectroscopy

Challenging the Limit of Detection of Compact Spectrometers

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Traditional thinking is that compact spectrometers do not offer the sensitivity or speed needed to compete with benchtop fluorimeters for many fluorescence measurements. We explain how limit of detection (LOD) and limit of quantitation (LOQ) are defined and measured, and challenge that preconception by demonstrating picomolar LOD for fluorescein with a compact, cost-effective spectrometer capable of capturing 50 ms scans with ease.

GL Spectis 1.0 T Flicker

GL Optic has implemented the new flicker metric stroboscopic visibility measure, which determines the probability of a stroboscopic effect, in its new GL Spectis 1.0 T Flicker spectrometer

New spectroscopy system to feature aboard Mars 2020 rover

The Centre National d’Etudes Spatiales, The Research Institute in Astrophysics and Planetology, and electrical engineering giant Thales Group are in the final stages of testing a new laser spectroscopy system for NASA’s upcoming Mars 2020 rover

Single molecule spectroscopy using tunable lasers

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The fluorescence excitation spectra of single organic molecules in a solid state crystal are measured at cryogenic temperatures using a single frequency tunable laser light source based on optical parametric oscillator technology. This laser exhibits promising features as a light source for spectroscopy applications, including a broad tuning range from 450 to 650 nm, narrow linewidth < 1 MHz and mode-hop-free tuning over > 25 GHz. This application note presents the experimental setup, measured spectra and discusses the applicability of this kind of laser for high-resolution spectroscopy.

The full spectrum

David Creasey details Wasatch Photonics’ history with Jessica Rowbury and discusses the challenges and opportunities going forwards

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