Title :
Effect of a Waist Diameter of a Microtapered Polarization-Maintaining Fiber on Temperature and Ambient Index Sensitivities
Author :
Min-Seok Yoon ; Ceol-Ju Kang ; Young-Geun Han
Author_Institution :
Dept. of Phys. & the Res. Inst. for Natural Sci., Hanyang Univ., Seoul, South Korea
Abstract :
The effect of a waist diameter of a microtapered polarization-maintaining fiber (PMF) on the temperature and the ambient index sensitivities is investigated theoretically and experimentally. Stress-induced and geometrical birefringences strongly depend on the waist diameter of the microtapered PMF, which plays a key role in temperature and ambient index sensitivities of the Sagnac interferometer. By reducing the waist diameter to ~5 μm, we successfully control the ambient index and the temperature sensitivities of the Sagnac interferometer to be -98.7 nm/RIU and -0.16 nm/°C, respectively, which are ~23 times higher and 1.7 times lower than those with a waist diameter of 25 μm.
Keywords :
birefringence; fibre optic sensors; geometrical optics; micro-optics; microsensors; optical control; optical fibre polarisation; optical fibre testing; refractive index; temperature measurement; temperature sensors; Sagnac interferometer; ambient index control; geometrical birefringences; microtapered polarization-maintaining fiber; stress-induced birefringences; temperature sensitivities; waist diameter effect; Indexes; Optical fiber communication; Optical fiber polarization; Sagnac interferometers; Sensitivity; Temperature sensors; Ambient index sensors; Fiber-optic sensors; Sagnac interferometers; ambient index sensors; fiber-optic sensors,microtapered PMFs; microtapered PMFs; temperature sensors;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2369575
