All-fiber multimode-interference-based refractometer sensor: proposal and design.
A novel all-fiber refractometer sensor is proposed, which is based on multimode interference in the multimode fiber core section sandwiched between two single-mode fibers. A wide-angle beam propagation method in the cylindrical coordinate is employed as the modeling tool for simulation and design of the proposed refractometer sensor. The design for a refractometer is presented that shows that the refractometer would have an estimated resolution of 5.4 x 10(-5) for refractive indices from 1.33 to 1.45 and of 3.3 x 10(-5) for refractive indices from 1.38 to 1.45 through the choice of an appropriate length of the multimode fiber core section.
Applied Optoelectronics Centre, School of Electronics and Communications Engineering, Dublin Institute of Technology, Ireland. Qian.wang@dit.ie
Qian
Q
Wang
Gerald
G
Farrell