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Large-effective-area dispersion-compensating fiber design based on dual-core microstructure.

Gautam Prabhakar¹, Akshit Peer, Vipul Rastogi

¹Department of Electrical Engineering, Delhi Technological University, Delhi 110 042, India.

|July 12, 2013

Summary

This study introduces a novel dual-core dispersion-compensating fiber (DCF) for optical communications. The new DCF design achieves significant negative dispersion for both narrowband and broadband applications, enhancing long-haul link performance.

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Area of Science:

Optical Fiber Technology
Telecommunications Engineering
Materials Science

Background:

Long-haul optical communication systems require effective dispersion compensation to maintain signal integrity.
Existing dispersion-compensating fibers (DCFs) face limitations in achieving desired dispersion characteristics.
Microstructure-based fiber designs offer potential for tailored optical properties.

Purpose of the Study:

To propose and analyze a novel microstructure-based dual-core dispersion-compensating fiber (DCF).
To achieve high negative dispersion for narrowband and broadband applications in optical communication links.
To investigate the impact of structural parameters on dispersion characteristics and performance trade-offs.

Main Methods:

Conceptualization by combining all-solid dual-core DCF and dispersion-compensating photonic crystal fiber principles.

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Numerical analysis using a full vectorial finite difference time domain (FDTD) method.

Systematic investigation of structural parameter variations on dispersion and mode area.

Main Results:

A narrowband DCF design achieved a very large negative dispersion of approximately -42,000 ps/nm/km with a 67 μm² mode area.
A broadband DCF design provided dispersion values ranging from -860 ps/nm/km to -200 ps/nm/km across the C-band.
The study detailed the trade-offs between fiber parameters like full width at half-maximum (FWHM) and dispersion.

Conclusions:

The proposed dual-core DCF design offers a promising solution for dispersion compensation in long-haul optical networks.
The design demonstrates versatility for both narrowband and broadband dispersion compensation requirements.
Microstructure engineering provides a viable pathway for optimizing DCF performance.