Compact sensor providing room-temperature operation of monolithic surface-active lasers and detectors integrated on the same chip. The differentiation between emitter and detector is eliminated, which enables mutual commutation. Proof-of-principle gas measurements with a limit of detection below 400 ppm are demonstrated. This concept enables a crucial miniaturization of sensing devices.
In technological gas detection there are a whole host of methods available including infrared lasers, passing a laser beam through the gas to an adjacent separate detector, which measures the degree of light attenuation it causes...
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