Issue |
EPL
Volume 105, Number 4, February 2014
|
|
---|---|---|
Article Number | 44001 | |
Number of page(s) | 6 | |
Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
DOI | https://doi.org/10.1209/0295-5075/105/44001 | |
Published online | 03 March 2014 |
Solitary waves in parity-time (PT)–symmetric Bragg grating structure and the existence of optical rogue waves
Department of Physics, Indian Institute of Technology Guwahati - Guwahati-781 039, Assam, India
Received: 24 January 2014
Accepted: 19 February 2014
In this work, we have studied the traveling wave solution in a nonlinear Bragg grating structure in which the core of the optical fiber is having parity-time (PT)–symmetric refractive index distribution. Below the PT-threshold, we have found a bright-solitary-wave solution for forward waves and a dark-solitary-wave solution for backward waves. The effects of increasing the traveling wave speed on the spatio-temporal evolutions of the analytical solutions have been shown and above the PT-threshold, emergence of the optical rogue waves (ORWs) has been explored based on the system parameters.
PACS: 42.65.Sf – Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 42.65.Tg – Optical solitons; nonlinear guided waves
© EPLA, 2014
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