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Proceedings Paper

High-performance surface-normal 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

We present high-performance surface-normal modulators based on unique properties of stepped quantum wells (SQWs) around the eye-safe wavelength of 1550 nm. Fabricated devices show nearly two times better efficiency and 7 dB higher extinction ratio compared with the conventional devices with rectangular and coupled-quantum well active layers. Moreover, the optical bandwidth is about 70 nm at a 3dB modulation depth, which is more than five times wider than the optical bandwidth of the conventional devices. Such a wide optical bandwidth eliminates the need for a temperature controller. This is a critical advantage for many applications such as unmanned aerial vehicles (UAVs) and dynamic optical tags (DOTs), where limited volume, power, and weight can be allocated to the modulator system.

Paper Details

Date Published: 24 May 2005
PDF: 8 pages
Proc. SPIE 5814, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications, (24 May 2005); doi: 10.1117/12.607320
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. 5814:
Enabling Photonics Technologies for Defense, Security, and Aerospace Applications
Andrew R. Pirich; Michael J. Hayduk; Eric J. Donkor; Peter J. Delfyett, Editor(s)

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