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Proceedings Paper

High-performance optical modulators based on stepped quantum wells
Author(s): H. Mohseni; W. K. Chan; H. An; A. Ulmer; D. Capewell
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Paper Abstract

High-speed and high-performance optical phase and amplitude modulators are critical components of many photonic systems. Semiconductor-based modulators are very attractive, since they can be monolithically integrated with other semiconductor devices. Unfortunately, the commonly used modulators based on square quantum wells have inherent properties that limit their modulation performance. We present a new class of quantum wells called "stepped quantum wells" (SQW) with extra degrees of freedom that can be used to design high performance optical modulators. We demonstrated SQW phase modulators with nearly one order of magnitude higher efficiency than their counterparts. Also, linearized modulators based on SQW with more than two orders of magnitude higher linearity than the existing semiconductor modulators are presented. Finally, high-performance surface-normal modulators based on SQWs with nearly two times better efficiency and 7 dB higher extinction ratio compared with the conventional devices with rectangular and coupled-quantum well active layers are demonstrated.

Paper Details

Date Published: 28 February 2006
PDF: 11 pages
Proc. SPIE 6127, Quantum Sensing and Nanophotonic Devices III, 61270D (28 February 2006); doi: 10.1117/12.640530
Show Author Affiliations
H. Mohseni, Northwestern Univ. (United States)
W. K. Chan, Sarnoff Corp. (United States)
H. An, Sarnoff Corp. (United States)
A. Ulmer, Sarnoff Corp. (United States)
D. Capewell, Sarnoff Corp. (United States)

Published in SPIE Proceedings Vol. 6127:
Quantum Sensing and Nanophotonic Devices III
Manijeh Razeghi; Gail J. Brown, Editor(s)

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