The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners.
As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.
i
Dissolved gas sensing using an anti-resonant hollow core optical fiber
-
2021
-
Source: Applied Optics, 60(33), 10354
[PDF-2.69 MB]
Details:
-
Journal Title:Applied Optics
-
Personal Author:
-
NOAA Program & Office:
-
Description:Sensors that measure dissolved gases directly are needed for environmental, industrial, and biomedical applications. Here we present a hollow core fiber optic sensor capable of measuring dissolved methane gas in liquids using only nanoliters of sample gas. The sensor is based on an anti-resonant hollow core fiber combined with a permeable capillary membrane inlet that extracts gas from the liquid for analysis. Using a small capillary inlet for gas extraction is only possible due to the small amount of sample gas needed for analysis, and it presents new possibilities for dissolved gas analysis in a simple, robust, and compact sensor configuration. We demonstrate the sensing technique using wavelength modulation spectroscopy and measure methane dissolved in water with a 1 σ lower detection limit of 230 ppb, a resolution of 45 ppb, and a response time of ∼ 8 min .
-
Keywords:
-
Source:Applied Optics, 60(33), 10354
-
DOI:
-
ISSN:1559-128X;2155-3165;
-
Format:
-
Publisher:
-
Document Type:
-
Funding:
-
Rights Information:Other
-
Compliance:Library
-
Main Document Checksum:
-
Download URL:
-
File Type:
