A time domain beam propagation method for chirped signals
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2014

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.

time stretch systems

chirped signals

finite elements

Time domain beam propagation

Författare

Stefan Jakobsson

Elin Solberg

Göteborgs universitet

Chalmers, Matematiska vetenskaper, Matematik

Fredrik Edelvik

XXXV Congresso Nacional de Matemática Aplicada e Computacional, 8-12 September 2014, Natal, Brazil

Ämneskategorier

Beräkningsmatematik

Annan elektroteknik och elektronik

Fundament

Grundläggande vetenskaper

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2017-10-07