| 摘要 |
<p>Using a gas detector, photonic radiation is emitted over a first range of frequencies and through a pathway. The gas detector includes at least one broadband light source, at least one detector, and an electronically tunable filter element disposed in the pathway and between the at least one light source and the at least one detector. The electronically tunable filter element allows a window of radiation frequencies to pass through the filter and suppresses other radiation frequencies. The electronically tunable filter element is tuned to allow different windows of radiation frequencies to pass through the filter. Photonic radiation energy that passes through the tuned electronically tunable filter element and impinges on the detector is measured to form a spectral absorption signature characterizing constituents of gas in the pathway. Related apparatus, systems, techniques, and articles are also described.</p> |
