Design of Single-Band Bandpass Filter Using Photonic Bandgap Fiber by Suppressing Core Modes in Higher Order Bandgaps

Abstract

We present two designs of all-solid photonic bandgap fiber for higher order bandgap suppression to realize a unique transmission window for optical filtering purpose. These two approaches are based on either applying a low refractive index core or a high refractive index background. This work describes direct calculations of different modes in high-index rods in the all-solid photonic bandgap fiber using the ARROW model for a double cladded step index fiber. The flat-top single-band bandpass filter obtained with potential center wavelength over UV, visible and IR region. We achieve the single-band bandpass filter with minimum pass band to rejection band ratio of 20 dB in core power. From the calculated performance, both analytical and simulation results are in good agreement with confinement loss calculation.

Methanol-Filled Hybrid Photonic Crystal Fiber with High Birefringent and Negative Dispersion

“…Also light propagation in PCFs is far superior to standard fiber, which uses constant lower refractive index cladding. There are many peculiar applications for PCF which includes spectroscopy [6], metrology, biomedicine, imaging, telecommunication, industrial machining, and military technology [7][8][9][10][11]. Dual-core PCF is used as the sensing element of the hydrostatic pressure sensor [12].…”

Dual-Resonance-Coupling and Sensing Characteristics in an All-Solid Photonic Bandgap Fiber Interferometer Based on LP01 Cladding Supermodes

“…All-solid photonic bandgap fibers (ASPBFs), which confine light in low refractive index solid core by the anti-resonant reflecting optical waveguide (ARROW) effect, have attracted great attention in recent years due to their special and outstanding advantages over conventional fibers [11]- [21]. An ASPBF usually consists of silica background with a periodically arranged high index rods embedded in the low-index background.…”