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A time domain beam propagation method for chirped signals

Conference contribution
Authors Stefan Jakobsson
Elin Solberg
Fredrik Edelvik
Published in XXXV Congresso Nacional de Matemática Aplicada e Computacional, 8-12 September 2014, Natal, Brazil
Publication year 2014
Published at Department of Mathematical Sciences, Mathematics
Language en
Keywords Time domain beam propagation, finite elements, chirped signals, time stretch systems
Subject categories Numerical analysis, Other electrical engineering, electronics and photonics


Chirped pulses are used in time stretch analog-to-digital converters to stretch high speed electric signals so that they can be measured with conventional detectors. Here a time domain beam propagation method for strongly chirped signals propagating along a specified direction is presented. By examining the propagation of chirped pulses in waveguides we derive a phase factor which captures the rapidly oscillating part of the chirped pulse. We then solve for the slowly varying envelope with respect to this phase factor in a time window moving with the pulse. The new method is applied to simulation of electro-optical modulators for chirped pulses with promising results.

Page Manager: Webmaster|Last update: 9/11/2012

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