Special Issue "Photonic Crystal Fiber"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: closed (10 February 2018)

Special Issue Editor

Guest Editor
Prof. Dr. Durdu Guney

Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, Michigan 49931, USA
Website | E-Mail
Interests: metamaterials; plasmonics; photonic crystals; quantum information

Special Issue Information

Dear Colleagues,

The conventional optical fibers had a lasting impact on the socio-economic advance around the globe. However, there is limited prospect for further improvement. The emergence of photonic crystal fibers (PCFs) have raised the hopes for a new leap beyond what is currently possible.

In 1995, Birks, et al. demonstrated PCFs with full two-dimensional bandgaps for all polarizations. The same group, in 1997, built an all-silica PCF which shows single mode behaviour at all wavelengths within the transparency window of silica. Knight, et al. in 1998, reported the realization of large mode area single mode fiber with a core diameter of fifty free-space wavelengths. In 1999, Cregan, et al. reported a hollow-core PCF which allows single mode photonic bandgap guidance of light in air. Ortigosa-Blanch, et al. reported in 2000, highly birefringent polarization maintaining PCF operating at telecom band. In the same year, the first Yb-doped PCF laser (Wadsworth, et al.) and white-light supercontinuum source (Jinendra, et al.) 10,000 times brighter than the Sun were also reported. First experimental demonstration of nondegenerate four-wave mixing and quantum-correlated photon pair were reported by Sharping, et al. in 2001 and 2004, respectively. In 2005, Al-Janabi and Wintner reported a high-power laser transmission through a hollow-core PCF.

Today, PCFs continue to find promising applications in a wide range of avenues including optical communications, optical amplifiers, lasers, nonlinear optics, ultra-high power transmission, sensing, and many more. This special issue aims to contribute meaningfully to a large body of existing work in the field in a way pointing to resources that are novel, scientifically intriguing, or technologically relevant. It is encouraged to submit papers on the topics including but not limited to ultra-low-loss transmission, quantum communications, new light sources and amplifiers, gyroscopes, resonators, basic optical toolbox elements, plasmonics, metamaterials, and high-resolution imaging and detection.

Prof. Dr. Durdu Guney
Guest Editor

Manuscript Submission Information

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Keywords

  • photonic crystal fibers
  • optical communications
  • light sources
  • optical amplifiers

Published Papers (2 papers)

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Research

Open AccessArticle Analysis of Leaky Modes in Photonic Crystal Fibers Using the Surface Integral Equation Method
Crystals 2018, 8(4), 177; https://doi.org/10.3390/cryst8040177
Received: 1 March 2018 / Revised: 14 April 2018 / Accepted: 14 April 2018 / Published: 19 April 2018
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Abstract
A fully vectorial algorithm based on the surface integral equation method for the modelling of leaky modes in photonic crystal fibers (PCFs) by solely solving the complex propagation constants of characteristic equations is presented. It can be used for calculations of the complex
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A fully vectorial algorithm based on the surface integral equation method for the modelling of leaky modes in photonic crystal fibers (PCFs) by solely solving the complex propagation constants of characteristic equations is presented. It can be used for calculations of the complex effective index and confinement losses of photonic crystal fibers. As complex root examination is the key technique in the solution, the new algorithm which possesses this technique can be used to solve the leaky modes of photonic crystal fibers. The leaky modes of solid-core PCFs with a hexagonal lattice of circular air-holes are reported and discussed. The simulation results indicate how the confinement loss by the imaginary part of the effective index changes with air-hole size, the number of rings of air-holes, and wavelength. Confinement loss reductions can be realized by increasing the air-hole size and the number of air-holes. The results show that the confinement loss rises with wavelength, implying that the light leaks more easily for longer wavelengths; meanwhile, the losses are decreased significantly as the air-hole size d/Λ is increased. Full article
(This article belongs to the Special Issue Photonic Crystal Fiber)
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Open AccessArticle Ultra-Wide-Bandwidth Tunable Magnetic Fluid-Filled Hybrid Connected Dual-Core Photonic Crystal Fiber Mode Converter
Crystals 2018, 8(2), 95; https://doi.org/10.3390/cryst8020095
Received: 13 January 2018 / Revised: 7 February 2018 / Accepted: 10 February 2018 / Published: 12 February 2018
Cited by 1 | PDF Full-text (3969 KB) | HTML Full-text | XML Full-text
Abstract
We propose a tunable magnetic fluid-filled hybrid photonic crystal fiber mode converter. Innovative design principles based on the hybrid connected dual-core photonic crystal fiber and magnetically modulated optical properties of magnetic fluid are developed and numerically verified. The mode converter was designed to
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We propose a tunable magnetic fluid-filled hybrid photonic crystal fiber mode converter. Innovative design principles based on the hybrid connected dual-core photonic crystal fiber and magnetically modulated optical properties of magnetic fluid are developed and numerically verified. The mode converter was designed to convert LP11 in the index-guiding core to the LP01 mode in the photonic bandgap-guiding core. By introducing the magnetic fluid into the air-hole located at the center of the photonic bandgap-guiding core, the mode converter can realize a high coupling efficiency and an ultra-wide bandwidth. The coupling efficiency can reach up to 99.9%. At a fixed fiber length, by adjusting the strength of the magnetic field, the coupling efficiency can reach up to 90% and 95% at wavelengths in the ranges of 1.33 µm–1.85 µm and 1.38 µm–1.75 µm, with bandwidth values reaching 0.52 µm and 0.37 µm, respectively. Moreover, it has a good manufacturing flexibility. The mode converter can be used to implement wideband mode-division multiplexing of few-mode optical fiber for high-capacity telecommunications. Full article
(This article belongs to the Special Issue Photonic Crystal Fiber)
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