Journal
OPTICAL REVIEW
Volume 23, Issue 5, Pages 703-707Publisher
OPTICAL SOC JAPAN
DOI: 10.1007/s10043-016-0238-2
Keywords
Fiber-Bragg-grating; Fiber sensor; Vertical-cavity surface-emitting laser; Temperature stabilization; Temperature sensor; Strain sensor
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Funding
- JSPS KAKENHI [24560462]
- Grants-in-Aid for Scientific Research [24560462] Funding Source: KAKEN
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The interrogation of fiber-Bragg-grating (FBG) sensors using a vertical-cavity surface-emitting laser (VCSEL) is discussed. A long-wavelength (1.54 mu m) VCSEL was used as a wavelength-tunable source by variation in the current. Temperature stabilization was performed with a thermoelectric device. Characteristics of temperature and strain sensing were investigated. FBGs with different reflectivities were compared. For temperature sensing, the root-mean-square error in the measurement was reduced to 1/3 that without temperature stabilization. The dependence of the measurement error on the reflectivities of the FBGs was investigated. The measurement error was larger for FBGs with lower reflectivities in both temperature and strain sensing. Improvement on the sensing with low-reflectivity FBGs is discussed.
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