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Method for enhanced evanescent field exposure in an optical fiber resonator for spectroscopic detection and measurement of trace species
Method for enhanced evanescent field exposure in an optical fiber resonator for spectroscopic detection and measurement of trace species
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机译:在光谱检测和测量痕量物质的光纤谐振器中增强渐逝场暴露的方法
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摘要
A method for detection and measurement of trace species in a gas or liquid sample is provided. The method comprises forming a sensor from an optical fiber by tapering a portion the optical fiber along a length thereof, exposing the tapered portion of the optic fiber to the sample gas or sample liquid, emitting radiation from a coherent source, coupling at least a portion of the radiation emitted from the coherent source into the fiber optic ring, receiving a portion of the radiation traveling in the fiber optic ring, and determining the level of trace species in the gas or liquid sample based on a rate of decay of the radiation within the fiber optic ring.
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