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We present a new technique for cavity enhanced optical absorption spectrometry, employing a radio-frequency amplitude modulated laser to interrogate an optical cavity. It is capable of sensing molecular absorption at the fundamental laser shot noise limit, and is able to perform quantum noise limited gas sensing at atmospheric pressure. We implement this technique, for the first time, in a free space...
Daylight Solutions is developing broadly tunable, external cavity quantum cascade lasers (EC-QCLs) for gas sensing instrumentation for numerous markets including medical breath analysis. Progress in two specific areas of development will be discussed: (i) miniaturization of a fast tunable, moderate resolution, pulsed EC-QCL and (ii) demonstration of a EC-QCL acetone sensor capable of breath acetone...
We have designed novel optical cavity and simulated it for NDIR gas sensor application. Novel optical cavity enhanced the light focusing effects. In this research, we developed the temperature compensated NDIR CO2 gas sensor for heat exchange system. The output characteristics of developed sensor module shows an exponentially decreasing property and all parameters are temperature dependent. The temperature...
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