Journal
ACTA PHYSICA SINICA
Volume 66, Issue 7, Pages -Publisher
CHINESE PHYSICAL SOC
DOI: 10.7498/aps.66.074212
Keywords
photothermal spectroscopy; hollow-core photonics bandgap fiber; gas sensor; optical fiber interferometry; optical fiber sensor
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Funding
- National Natural Science Foundation of China [61535004, 61290313]
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We report our recent work on the development of a highly sensitive gas detection technique-photothermal interferometry spectroscopy with hollow-core optical fibers. The basic principle of operation, generation and detection of dynamic photothermal phase modulation, and method to improve the response time of the hollow-core fiber sensors are described. The technique has ultra-high sensitivity and dynamic range, and the measurement is not affected by reflection/scattering and other non-absorbing losses. Sensors based on such a technique could be made compact in size with remote detection, multiplexing and networking capability, which would enable a range of high performance applications in environmental, medical and safety monitoring.
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