Group velocity dispersion

In this work, we proposed a simple model for control of subluminal and superluminal light propagation via an external magnetic field in a lambda configuration degenerate two-level atomic medium. We show that the absorption-dispersion properties and group index under the influence of the strength of coupling laser and external magnetic fields are controlled.

8p viambani 18-06-2024 3 1   Download

Research purpose: to build an analytical model describing the dependence of the optical properties (absorption, dispersion, group velocity and group delay) of the three configuration energy level system Λ, Ξ and V according to the following parameters: control parameters (intensity, frequency, polarization and relative phase) of the laser fields.

25p prisonbreak123 21-05-2021 16 3   Download

In nonlinear optics, the soliton transmission in different forms can be described with the use of nonlinear Schrödinger (NLS) equations. Here, the soliton transmission is investigated by solving the NLS equation with the reciprocal of the group velocity b1ðzÞ, the group velocity dispersion coefficient b2ðzÞ and nonlinear coefficient cðzÞ. Two-soliton solutions for the NLS equation are obtained through the Hirota method. According to the solutions obtained, b1ðzÞ and cðzÞ with different function forms are taken to study the characteristics of solitons.

8p trinhthamhodang1 14-11-2019 23 0   Download

In this study, the generalized nonlinear Schrödinger equation describing nonlinear wave propagation in optical fiber with all higher order effects such as higher order dispersion, self-phase modulation and Raman scattering is considered. Using the numerical method, the effects of the terms third order dispersion, Raman scattering on evolution of ultrashort pulses are investigated in detail.

6p viengland2711 23-07-2019 15 2   Download

n this work, we review recent research works concerning multiple EIT and some related applications such as controlling group velocity of light, giant Kerr nonlinearity, optical bistability. The special attention of the review is also on analytical interpretations of the results to give physics insight and suitable applications. From an experimental point of view, the latest development for measuring multiple EIT spectrum and its dispersion in hot medium is presented and compared to the theoretical analytical representations.

33p letanhien2309 19-02-2019 39 1   Download

Lightwave Systems The preceding three chapters focused on the three main components of a fiber-optic communication system—optical fibers, optical transmitters, and optical receivers. In this chapter we consider the issues related to system design and performance when the three components are put together to form a practical lightwave system. Section 5.1 provides an overview of various system architectures. The design guidelines for fiberoptic communication systems are discussed in Section 5.2 by considering the effects of fiber losses and group-velocity dispersion.

43p khinhkha 29-07-2010 77 6   Download