Non-reciprocal transmission and Schmitt trigger operation in strongly modulated asymmetric WBGs

Fujii, M; Maitra, A; Poulton, C; Leuthold, J; Freude, W

Non-reciprocal transmission and Schmitt trigger operation in strongly modulated asymmetric WBGs

Fujii, M Maitra, A Poulton, C

Leuthold, J Freude, W

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Publication Type:: Journal Article
Citation:: Optics Express, 2006, 14 (26), pp. 12782 - 12793
Issue Date:: 2006-12-25

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Field	Value	Language
dc.contributor.author	Fujii, M	en_US
dc.contributor.author	Maitra, A	en_US
dc.contributor.author	Poulton, C https://orcid.org/0000-0002-2707-3424	en_US
dc.contributor.author	Leuthold, J	en_US
dc.contributor.author	Freude, W	en_US
dc.date.issued	2006-12-25	en_US
dc.identifier.citation	Optics Express, 2006, 14 (26), pp. 12782 - 12793	en_US
dc.identifier.uri	http://hdl.handle.net/10453/493
dc.description.abstract	We investigate numerically a non-reciprocal switching behavior in strongly modulated waveguide Bragg gratings (WBGs) having a longitudinally asymmetric stopband configuration. The minimum power predicted for a stable switching operation is found to be approximately 77 mW for a realistic waveguide structure made of prospective materials; we assume in this paper a nano-strip InGaAsP/InP waveguide having longitudinally asymmetric modulation of the waveguide width. The analysis has been performed with our in-house nonlinear finite-difference time-domain (FDTD) code adapted to parallel computing. The numerical results clearly show low-threshold Schmitt trigger operation, as well as non-reciprocal transmission property where the switching threshold for one propagation direction is lower than that for the other direction. In addition, we discuss the modulation-like instability phenomena in such nonlinear periodic devices by employing both an instantaneous Kerr nonlinearity and a more involved saturable nonlinearity model. © 2006 Optical Society of America.	en_US
dc.relation.ispartof	Optics Express	en_US
dc.relation.isbasedon	10.1364/OE.14.012782	en_US
dc.rights	© 2006 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.	en_US
dc.subject.classification	Optics	en_US
dc.title	Non-reciprocal transmission and Schmitt trigger operation in strongly modulated asymmetric WBGs	en_US
dc.type	Journal Article
utslib.citation.volume	26	en_US
utslib.citation.volume	14	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	26	en_US
pubs.publication-status	Published	en_US
pubs.volume	14	en_US

Abstract:

We investigate numerically a non-reciprocal switching behavior in strongly modulated waveguide Bragg gratings (WBGs) having a longitudinally asymmetric stopband configuration. The minimum power predicted for a stable switching operation is found to be approximately 77 mW for a realistic waveguide structure made of prospective materials; we assume in this paper a nano-strip InGaAsP/InP waveguide having longitudinally asymmetric modulation of the waveguide width. The analysis has been performed with our in-house nonlinear finite-difference time-domain (FDTD) code adapted to parallel computing. The numerical results clearly show low-threshold Schmitt trigger operation, as well as non-reciprocal transmission property where the switching threshold for one propagation direction is lower than that for the other direction. In addition, we discuss the modulation-like instability phenomena in such nonlinear periodic devices by employing both an instantaneous Kerr nonlinearity and a more involved saturable nonlinearity model. © 2006 Optical Society of America.

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http://hdl.handle.net/10453/493