The IUP Journal of Telecommunications
Design and Analysis of Highly Nonlinear and Low Dispersion AlGaAs-Based Photonic Crystal Fiber

Article Details
Pub. Date : November, 2020
Product Name : The IUP Journal of Telecommunications
Product Type : Article
Product Code : IJTC41120
Author Name : Gyanender Kumar and Sachin Kumar Yadav
Availability : YES
Subject/Domain : Arts & Humanities
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No. of Pages : 12

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Abstract

The paper studies an AlGaAs-based standard photonic crystal fiber structure for low dispersive nonlinear optics applications. By employing a finite element solver with perfectly matched layer boundary condition, the key propagation characteristics are investigated over a broad wavelength span of 1 μm to 5 μm by taking different air filling fraction values. The proposed work provides an effective fundamental mode area of 7.30 μm2 with nonlinearity in the order of 8.325W-1m-1 at a low absorption wavelength of 1.55 μm and zero-dispersion wavelength close to 3 μm.


Introduction

Conventional optical fibers have two fundamental parts: core and cladding. Both are solid with a minute difference in refractive index, which is liable for guiding the light wave (Argyros et al., 2005). A modification is done by Russell (1990s) in the structure of standard optical fiber based on light directing mechanism of 2D photonic crystal. This modified structure is known as Photonic Crystal Fiber (PCF) (Ashihara et al. (2002). Modification is done in the cladding region by inserting the rings of air holes along the full fiber length. The core can be solid or hollow depending on the application's requirement. Refracted light from the air holes' periodic arrangement is collected through missing one air hole in the center (solid core). This light-guiding conduct is called modified total internal reflection and fiber is considered as index guiding PCF. When refracted light is collected towards a low refractive index hollow core, this phenomenon goes under the photonic bandgap guiding technique (Avdokhin et al., 2003; and Bache et al., 2006).


Keywords:

Photonic Crystal Fiber (PCF), Nonlinear material, Finite element method, Nonlinearity

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