Numerical Simulation of Three-Core Photonic Crystal Fiber With Large Group-Velocity Dispersion

Abstract

The three-core photonic crystal fiber (TC-PCF) is proposed to obtain large group-velocity dispersion (GVD) because of the coupling effects between the fundamental modes (FMs) of the central core and higher-order modes (HOMs) of the two side cores. The supermodes of the TC-PCF can provide concave anomalous-and normal-GVD profiles with large peak values at the maximum dispersion wavelengths (MDWs), which can be shifted in three wavelength windows of 1030 nm, 1550 nm and 1900 nm by properly tuning the refractive indexes of the cores or the air-hole diameters. Furthermore, the numerical results show that two segments of the TC-PCFs with large anomalous GVDs and opposite values of the third-order dispersion (TOD) can provide much higher efficiency of pulse compression than one segment of the TC-PCF. Additionally, the TC-PCFs with large normal GVDs can be used to stretch pulses due to their low nonlinearities and short fiber lengths.

Polarization Selective PCF-Based Plasmonic Biosensor for Multi-Analyte Detection

“…Recent developments in sensing technology have heightened the need for future sensors to do real-time measurements and high susceptible detection. Photonic crystal fiber (PCF) has wide-spread popularity due to its unique properties, including miniaturized and flexible structure [1], better light-guiding [2], and controllable dispersion [3,4]. Conversely, surface plasmon resonance (SPR) offers label-free [5], in-situ and sensitive real-time detection [6,7].…”

“…The conventional SPR setup requires bulky optical instruments [8,9]. For instance, the earliest SPR was used with prism for biosensing which was unable to offer miniaturized and portable sensors [2,10]. However, by integrating SPR into PCF, it is possible to achieve a small structure and pave a way as a future sensor.…”