Author :
Beltran-Mejia, Felipe ; Osorio, Jonas H. ; Biazoli, Claudecir R. ; Cordeiro, Cristiano M. B.
Author_Institution :
Inst. de Fis. "Gleb Wataghin", Univ. Estadual de Campinas - UNICAMP, Campinas, Brazil
Abstract :
A simple mechanical setup was used to polish a standard single mode optical fiber in order to make it asymmetric. The polished fiber was tapered down maintaining the D-shape transversal profile. Its broken symmetry along with the extended evanescent field, due to the dimensions of the microfiber, implies a potentially high birefringent waveguide as well as a high-sensitivity external refractive index device. An experimental maximum sensitivity of S ≈ (3.0±0.2)×104 nm/RIU was achieved, other experimental and numerical results supporting our initial assumptions are also presented.
Keywords :
birefringence; fibre optic sensors; micro-optics; microsensors; optical fibre fabrication; polishing; refractive index measurement; D-microfibers; D-shape transversal profile; birefringent waveguide; broken symmetry; extended evanescent field; high-sensitivity external refractive index device; maximum sensitivity; polished fiber; simple mechanical setup; single mode optical fiber; Optical device fabrication; Optical refraction; Optical sensors; Optical variables control; Refractive index; Sensitivity; Wavelength measurement; Birefringence; microoptics; microsensors; optical fiber sensors; sensitivity; sensors;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2013.2272915
