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Title: A Fiber Bragg Grating Temperature Sensor for 2-400 K

We demonstrate fiber optic, multiplexible temperature sensing using a fiber Bragg grating (FBG) with an operational range of 2-400 K, and a temperature resolution better than 10 mK for temperatures < 12 K. This represents a significant reduction in the lowest usable temperature as well as a significant increase in sensitivity at cryogenic temperatures compared with previously reported multiplexible solutions. This is accomplished by mounting the section of the fiber with a FBG on a polytetrafluoroethylene coupon, which has a non-negligible coefficient of thermal expansion down to < 4 K. The sensors exhibit a good stability over multiple temperature cycles and acceptable sensor-to-sensor repeatability. Possible applications for this sensor include distributed temperature sensing across superconducting elements and cryogenic temperature measurements in environments where electrical measurements are impractical or unsafe.
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Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-ACC-15-1946; DOE/OR/23177-3470
Journal ID: ISSN 1530-437X
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Sensors Journal; Journal Volume: 15; Journal Issue: 3
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Country of Publication:
United States