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Spectrometer Uses Silicon Photonics to Efficiently Monitor Gas Leaks

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A chip-based spectrometer that is smaller than a dime has demonstrated the ability to detect methane in concentrations as low as 100 parts-per-million. The spectrometer leverages silicon photonics technology to realize a compact, cost-effective design that provides IR tunable diode-laser absorption spectroscopy (IR-TDLAS) on a CMOS-compatible platform. Developed by scientists at IBM Thomas J. Watson Research Center, the chip-based spectrometer uses an approach similar to absorption spectroscopy; but instead of a free-space setup, the laser travels through a narrow silicon waveguide that...Read full article

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