Chromatic dispersion up to the third order: application to post-equalization and pulse rate multiplication
ABSTRACT We present an approach to analyze the Talbot effect caused by chromatic dispersion up to the third order. A new method for compensation of chromatic dispersion up to the third order caused by propagation through the optical fiber is advanced. To the best of our knowledge, this method is the first that uses an optical post-equalization stage based on the temporal Talbot effect. Moreover, using this approach, we can easily implement a system doubling, tripling, ... the pulse rate of an initial periodic signal.
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ABSTRACT: In this paper, we carry out a systematic study on the interaction between ultrashort optical pulses and fiber Bragg grating structures operating in the linear regime. Our study is based on the joint time-frequency representation (spectrogram) of the reflection impulse response from the grating structures under analysis. By means of such a representation we get to visualize in a single image all the relevant information concerning the optical and dispersive behavior of the grating structures and more importantly, we obtain information on the pulse-grating interaction process, which otherwise is not accessible from any other method. Here, we analyze uniform and nonuniform fiber Bragg gratings. The effects of the apodization of the coupling coefficient and chirp of the grating period on the macroscopic optical properties of the considered gratings are investigated. Furthermore, we extend our analysis to more complicated in-fiber grating structures such as concatenated gratings, Fabry-Perot-like grating structures, and superimposed gratings. The results of our study indicate that the time-frequency methods constitute a powerful tool for the analysis and design of fiber Bragg grating structures.Journal of Lightwave Technology 12/2003; 21(11):2931- 2941. · 2.86 Impact Factor
Chapter: Introduction to Fourier optics2 01/1995; Roberts and Company Publishers., ISBN: 0070242542
Article: Design of Talbot array illuminators[Show abstract] [Hide abstract]
ABSTRACT: We present a general approach to design Talbot array illuminators. In both one-dimensional and two-dimensional cases, a general analytical form is given for the conventional Talbot array illuminators. The proposed form is valid for every fractional Talbot distance. Furthermore, we extended our approach to various topologies of the bright spots in the replay field. Several examples of particular topologies, such as the chessboard configuration, are discussed. In addition, more complex configurations are considered and a useful design technique is proposed.Optics Communications 01/1996; 131(4):359-370. · 1.54 Impact Factor