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Proceedings Paper

Time-domain modelling of MMI structures with saturable gain media
Author(s): Bobo Hu; Phillip Sewell; Ana Vukovic; Jun Jun Lim; Trevor Benson
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Paper Abstract

Multimode interference (MMI) laser diode devices have been developed for a large number of optoelectronic applications. Frequency domain methods have been widely used to simulate the behavior of this class of device at fixed operating wavelengths. However time domain models are becoming more popular in photonic simulations as they are able to more accurately model the nonlinear optical gain media such as that present in the saturable absorber section used in the MMI laser diode. A detailed understanding of the electrodynamic behavior of this kind of device is most easily accessed using a time domain method. Therefore we have developed a time domain simulator: employing a full band (FB) time-domain beam propagation method (TD-BPM) for modeling laser devices. By making physically consistent approximations, the proposed method can obtain accurate results for the broadband electromagnetic response with a much larger time step size than those required by other conventional numerical techniques. In order to approximate saturable gain media used in laser device, we have extended the FB-TDBPM algorithm to include frequency-dependent saturable gain by using a Z transform technique. In this paper we will present this approach and its application to the time domain modeling of laser devices.

Paper Details

Date Published: 30 September 2005
PDF: 10 pages
Proc. SPIE 5956, Integrated Optics: Theory and Applications, 59560M (30 September 2005); doi: 10.1117/12.621359
Show Author Affiliations
Bobo Hu, Univ. of Nottingham (United Kingdom)
Phillip Sewell, Univ. of Nottingham (United Kingdom)
Ana Vukovic, Univ. of Nottingham (United Kingdom)
Jun Jun Lim, Univ. of Nottingham (United Kingdom)
Trevor Benson, Univ. of Nottingham (United Kingdom)

Published in SPIE Proceedings Vol. 5956:
Integrated Optics: Theory and Applications
Tadeusz Pustelny; Paul V. Lambeck; Christophe Gorecki, Editor(s)

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