In situ gas sensing using a remotely detectable probe with replaceable insert
- In situ gas sensing using a remotely detectable probe with replaceable insert
- 임선도; 마경식; 정지호; 김길환; 이관일; 정제명; 이상배
- Fiber optics sensors; Photonic crystal fibers
- Issue Date
- Optics express
- VOL 20, NO 2, 1727-1732
- We demonstrate a spectroscopic gas sensor using an optical fiber
probe with a replaceable insert. The probe consists of a hollow-core
photonic bandgap fiber (HC-PBGF) with a core diameter of 10.9 μm and a
glass tube where a 2-μm hollow core fiber (HCF) with a gold coated end
facet can be inserted. The HCF is designed to function as both a gate where
gases can enter the HC-PBGF and a mirror reflecting the guided light back
to the HC-PBGF. The opposite distal end of the probe is also designed to be
able to regulate the gas pressure within the HC-PBGF for a high gas flow
rate, while still transmitting the reflected light to the analysis instrument.
The remote sensing probe, we believe, has much potential for detecting
gases in hazardous environments.
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