TY - JOUR
T1 - In-fiber temperature sensor based on green up-conversion luminescence in an Er3+-Yb3+ co-doped tellurite glass microsphere
AU - Zhang, Meng
AU - Li, Angzhen
AU - Yu, Jibo
AU - Lu, Xiaosong
AU - Wang, Shunbin
AU - Lewis, Elfed
AU - Farrell, Gerald
AU - Yuan, Libo
AU - Wang, Pengfei
N1 - Publisher Copyright:
© 2019 Optical Society of America.
PY - 2019
Y1 - 2019
N2 - A novel, to the best of our knowledge, in-fiber temperature sensor based on green up-conversion (UC) luminescence in an Er3-Yb3 co-doped tellurite glass microsphere is described. The tellurite glass microsphere is located firmly inside a suspended tri-core hollow-fiber (STCHF) structure. The pump light launched via a single-mode fiber (SMF) is passed through a section of multimode fiber, which is fusion spliced between the SMF and the STCHF into the cores suspended inside the hollow fiber and coupled into the microsphere. Green and red UC emissions of the Er3 ions are observed using 980 nm pump excitation. The temperature-sensing capability of the tellurite glass microsphere is based on the thermally coupled effect between the upper energy levels responsible for green emissions at 528 nm and 549 nm. The resulting fluorescence intensity ratio, depending on the surrounding temperature range from 303 K to 383 K, is experimentally determined, and a maximum sensitivity of 5.47 × 10−3 K−1 is demonstrated. This novel in-fiber microsphere-resonator-based device is highly integrated and has the additional advantages of ease of fabrication, compact structure, and low fabrication cost and therefore has great application potential in integrated optical sources including lasers.
AB - A novel, to the best of our knowledge, in-fiber temperature sensor based on green up-conversion (UC) luminescence in an Er3-Yb3 co-doped tellurite glass microsphere is described. The tellurite glass microsphere is located firmly inside a suspended tri-core hollow-fiber (STCHF) structure. The pump light launched via a single-mode fiber (SMF) is passed through a section of multimode fiber, which is fusion spliced between the SMF and the STCHF into the cores suspended inside the hollow fiber and coupled into the microsphere. Green and red UC emissions of the Er3 ions are observed using 980 nm pump excitation. The temperature-sensing capability of the tellurite glass microsphere is based on the thermally coupled effect between the upper energy levels responsible for green emissions at 528 nm and 549 nm. The resulting fluorescence intensity ratio, depending on the surrounding temperature range from 303 K to 383 K, is experimentally determined, and a maximum sensitivity of 5.47 × 10−3 K−1 is demonstrated. This novel in-fiber microsphere-resonator-based device is highly integrated and has the additional advantages of ease of fabrication, compact structure, and low fabrication cost and therefore has great application potential in integrated optical sources including lasers.
UR - http://www.scopus.com/inward/record.url?scp=85068254240&partnerID=8YFLogxK
U2 - 10.1364/OL.44.003214
DO - 10.1364/OL.44.003214
M3 - Article
C2 - 31259924
AN - SCOPUS:85068254240
SN - 0146-9592
VL - 44
SP - 3214
EP - 3217
JO - Optics Letters
JF - Optics Letters
IS - 13
ER -