Novel miniature spectrometer for remote chemical detection. 1998 annual progress report

Technical Report · Mon Jun 01 04:00:00 EDT 1998

DOI:https://doi.org/10.2172/13463· OSTI ID:13463

Hudgens, J W

'This research will develop an entirely new class of chemical sensing technology that will enable qualitative and quantitative remote, real-time optical diagnostics of chemical species in hazardous gas, liquid, and semi-solid phases through a completely novel implementation of evanescent wave spectroscopy. The sensor design uses a tiny, solid block (< 1 cm{sup 3}) of ultra-high purity optical material that is fabricated into a regular, planar polygon with a convex facet to form a total-internal-reflection ring cavity. Cavity ring-down detection measures the absorption of evanescent waves by chemical species in contact with the cavity. By interfacing the cavity to a remotely located light source and detection system (e.g., 0.1 to 10 Km away), this new technology will permit remote, high-sensitivity, broadband chemical sensing with a rugged, cost-effective, miniature spectrometer. This report summarizes work conducted after 1 year of a 3-year project.'

• Research Organization: National Inst. of Standards and Technology, Gaithersburg, MD (US)
• Sponsoring Organization: USDOE Office of Environmental Management (EM), Office of Science and Risk Policy
• OSTI ID: 13463
• Report Number(s): EMSP-60231--98; ON: DE00013463
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
CHEMICAL WASTES
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DECOMMISSIONING
DECONTAMINATION
Decommissioning
Decontamination
HIGH-LEVEL RADIOACTIVE WASTES
High-Level Radioactive Wastes
MEASURING INSTRUMENTS
MEASURING METHODS
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PROGRESS REPORT
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RADIOACTIVE WASTES
REMEDIAL ACTION
Radioactive Wastes
Remedial Action