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