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Limits to modulation rates of electroabsorption modulators
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
2004 (English)In: IEEE Journal of Quantum Electronics, ISSN 0018-9197, E-ISSN 1558-1713, Vol. 40, no 4, 400-405 p.Article in journal (Refereed) Published
Abstract [en]

We analyze the speed limitations of optical electroabsorption modulators. We argue that modulation rate limits are closely related to quantum mechanical adiabaticity. By analyzing the breakdown of the adiabatic approximation, analytical expressions for modulation limits are found. These expressions are numerically validated. Furthermore, we discuss the constraints on the allowable modulation rate set by losses from the quantum well and transition linewidth.

Place, publisher, year, edition, pages
2004. Vol. 40, no 4, 400-405 p.
Keyword [en]
adiabatic approximation, electroabsorption, intersubband transitions, optical modulation, two-level system, UHF modulation, mu-m, intersubband transitions, quantum wells, dynamics
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-23302DOI: 10.1109/jqe.2004.825209ISI: 000220656800011Scopus ID: 2-s2.0-1942521070OAI: oai:DiVA.org:kth-23302DiVA: diva2:342000
Note
QC 20100525 QC 20111028Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Forsberg, ErikHessmo, BjörnThylén, Lars
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