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NEWSLETTER| 2022| Issue No. 2
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How spectrometers have downsized & new options for pocket spectroscopy
Spectroscopy is a universal tool, finding uses in commercial applications, precision analysis, and even forensic studies. Watch this video to see how we took large systems and, through our decades-long expertise in sensor design and nanotechnology, developed highly reliable and very sensitive spectrometers small enough to rest on a fingertip.
About the size of a small coin, this tiny grating-based spectrometer is ideal for pocket (consumer) spectrometers and handheld instruments. It has a spectral response range of 640-1050 nm and resolution of 17-20 nm (depending on the wavelength). Its input slit is 15 x 300 µm, and incoming light is dispersed by a nano-imprinted reflective grating and imaged onto a custom CMOS active pixel sensor (APS).
Dino Butron is an Applications Engineer, specializing in all of our point detectors and signal-to-noise simulations. He and his photonic sidekick (his cat Bash) tackle technical issues daily.
Q: What is excess noise in APDs?
A: Excess noise is the additional noise created by a detector with gain. A detector with excess noise of 1 means that the intrinsic noise is multiplied by 1—therefore, the noise is not made any worse—but any value over 1 means…Read more