Study on the Monotonicity of Bending Loss of Polymer Optical Fiber

Abstract

Bending loss of polymer optical fibers (POFs) shows unexpected oscillatory behaviors due to the interference between whispering gallery mode and core mode for the cases of small bending radius and large bending angle. We have found a novel method of suppressing the oscillatory behavior of bending loss of POFs. By partially removing the cladding and core, the bending loss monotonicity with improved linearity was obtained for POFs with small bending radius in a large range of bending angles for the first time. This method is useful in the application of extreme large strain (e.g., ࣙ60%) sensors of POF.Index Terms-Bending loss, bending sensor, extreme large strain, polymer optical fiber (POF), visible light, whispering gallery mode (WGM).

Development of a Handheld Line Information Reader and Generator for Efficient Management of Optical Communication Lines

“…The simulation results are presented using the developed device principle. Simulation of an optical radiation field was executed by radius of curvature and wavelength of transmission [ 35 , 36 , 37 ]. The sensitivity of the handheld line information reader was enhanced by employing various focusing lenses.…”

Temperature dependence of light power propagation in bending plastic optical fiber

“…Therefore, the light transmission behavior of bending POFs is an important issue, and there are already several studies focused on this issue. For instance, Moraleda A. T. et al studied the temperature sensor based on a bending POF with curvature radius of 1.5 and 2 mm [7], Tao Chen et al have investigated the bend loss of the POF with bend angle of 0-180° [8], and Yungchuan Chen et al have investigated the attenuation of bending POF with 1/2 turns in the temperature range of 25-80°C [9][10][11]. For a POF system, various turns are common in the practical applications, but there are few reports available regarding the temperature variation effect on the bending POFs with the turns greater than 1/2.…”