High sensitivity SMS fiber structure based refractometer – analysis and experiment

Abstract

we have investigated the influence of multimode fiber core (MMFC) diameters and lengths on the sensitivity of an SMS fiber based refractometer. We show that the MMFC diameter has significant influence on the refractive index (RI) sensitivity but the length does not. A refractometer with a lower MMFC diameter has a higher sensitivity. Experimental investigations achieved a maximum sensitivity of 1815 nm/ RIU (refractive index unit) for a refractive index range from 1.342 to 1.437 for a refractometer with a core diameter of 80 µm. The experimental results fit well with the numerical simulation results. fiber Bragg grating and multimode fibers using an intensity-based interrogation method", 2008 Optical Society of America

Specification Based Testing of on Android Systems

“…Short Message Service (SMS) is a radio based service for transferring short alphanumeric messages among mobile phones on GSM and UMTS cellular networks [29]. SMS allows mobile GSM phones to send and receive text messages.SMS is a widely used service for brief communication.…”

A simple optical fiber interferometer based breathing sensor

“…Single mode-multimode-single mode (SMS) fiber struc tures have been intensively investigated as refractive index (RI), temperature and humidity sensors over the past decade [15][16][17][18][19]. In our previous report, we have proved that an SMS fiber structure is sensitive to macro bending [20,21].…”

Dispersion effects of high-order-mode fiber on temperature and axial strain discrimination

“…In this paper, a HOMF-based fiber modal interferometer supporting three dominant modes is achieved with distinct chromatic dispersion of each guided mode and intermodal dispersion. Compared to conventional multimode interference structures (SMF-multimode-SMF structures, taper or lateral-offset in fiber Mach-Zehnder interferometers [23][24][25][26][27][28][29][30][31][32][33][34][35]) with a great amount of high-order optical modes, the proposed HOMF modal interferometer supports only a few steady core-guided modes which only need to be calibrated once for sensing response which is essential for practical applications. Thus the HOMF-based sensor here could be deployed for highly accurate discrimination based on the precise dispersion measurement and analysis on intermodal coupling with a novel phase demodulation scheme.…”