PMID- 29601020 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180404 LR - 20181023 IS - 1539-4794 (Electronic) IS - 0146-9592 (Linking) VI - 43 IP - 7 DP - 2018 Apr 1 TI - Approach for temperature-insensitive strain measurement using a dual-core As(2)Se(3)-PMMA taper. PG - 1523-1526 LID - 10.1364/OL.43.001523 [doi] AB - A temperature-insensitive strain sensor is proposed and demonstrated based on a dual-core As(2)Se(3)-polymethyl methacrylate (PMMA) taper. Longitudinal and transverse forces on the As(2)Se(3) cores are induced by thermal expansion/contraction of the PMMA cladding due to an order of magnitude difference between the thermal expansion coefficients of As(2)Se(3) and PMMA. At an optimal PMMA layer thickness, the wavelength shift caused by the thermally induced forces on the refractive index of the dual-core fiber cores counterbalances that caused by the thermally induced fiber length variation leading to temperature-insensitive transmission. Temperature-insensitive strain measurement over a temperature range from 30 degrees C to 40 degrees C is demonstrated in a dual-core As(2)Se(3)-PMMA fiber with an As(2)Se(3) core diameter of 0.61 mum and a PMMA cladding diameter of 34.4 mum. Thermally induced forces in hybrid fibers open the path towards the realization of novel sensors and devices that are immune to temperature fluctuations. FAU - Gao, Song AU - Gao S FAU - Baker, Chams AU - Baker C FAU - Chen, Liang AU - Chen L FAU - Bao, Xiaoyi AU - Bao X LA - eng PT - Journal Article PL - United States TA - Opt Lett JT - Optics letters JID - 7708433 EDAT- 2018/03/31 06:00 MHDA- 2018/03/31 06:01 CRDT- 2018/03/31 06:00 PHST- 2018/03/31 06:00 [entrez] PHST- 2018/03/31 06:00 [pubmed] PHST- 2018/03/31 06:01 [medline] AID - 383935 [pii] AID - 10.1364/OL.43.001523 [doi] PST - ppublish SO - Opt Lett. 2018 Apr 1;43(7):1523-1526. doi: 10.1364/OL.43.001523.