Han, YG Lee, SB 2024-01-21T05:01:33Z 2024-01-21T05:01:33Z 2021-09-03 2005-06 0021-4922 https://pubs.kist.re.kr/handle/201004/136427 We experimentally demonstrate the simultaneous measurements of strain and temperature on the basis of the temperature dependence of birefringence in a long-period fiber grating (LPFG) fabricated with a birefringent fiber. Birefringence induces dual peak formation in LPFG corresponding to the grating's polarization state. Depending on the temperature sensitivity of birefringence in LPFG, the differences in the wavelength shift and wavelength spacing change of dual peaks with variations in strain and temperature allow accurate and simultaneous measurements of strain and temperature, respectively. The rms errors of the measured strain and temperature were 7.5 mu strain and 0.5 degrees C, respectively. English JAPAN SOC APPLIED PHYSICS OPTICAL FIBERS FILTERS Discrimination of strain and temperature sensitivities based on temperature dependence of birefringence in long-period fiber gratings Article 10.1143/JJAP.44.3971 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.44, no.6A, pp.3971 - 3974 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 44 6A 3971 3974 scie scopus 000230126000067 2-s2.0-23944525291 Physics, Applied Physics Article OPTICAL FIBERS FILTERS long-period fiber gratings simultaneous measurement strain sensor temperature sensor