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Proceedings Paper

Analog and digital high-speed modulation of quantum cascade laser
Author(s): Rainer Martini; Claire F. Gmachl; Roberto Paiella; Federico Capasso; Chris Glazowski; Robert K. Murawski; Edward A. Whittaker; Clyde G. Bethea; Harold Y. Hwang; Deborah L. Sivco; James N. Baillargeon; Alfres Y. Cho; H. C. Liu
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Paper Abstract

In this paper we present measured modulation responses on quantum-cascade lasers (QCL) up to 10 GHz. The obtained modulation response shows a flat response over the whole frequency range, proving the broadband capabilities of these devices. Even more striking is the absence of a strong resonance peak, which demonstrates the absence of relaxation oscillations, a feature which often limits the high speed performance of standard diode lasers. This property is quite attractive for use of these devices as high-speed data sources, particularly in applications where linearity is important. To address this possible application, the digital modulation properties of these devices were tested in a standard bit-error-rate-measurement at 2.5 GBit/s for cryogenically cooled QCL, showing the suitability of QCLs in digital as well as analog telecommunication application. In addition we present recent data showing bit error measurements and eye diagrams obtained for the pulsed mode operation of QCL near room-temperature.

Paper Details

Date Published: 3 July 2003
PDF: 7 pages
Proc. SPIE 4995, Novel In-Plane Semiconductor Lasers II, (3 July 2003); doi: 10.1117/12.480193
Show Author Affiliations
Rainer Martini, Stevens Institute of Technology (United States)
Claire F. Gmachl, Lucent Technologies/Bell Labs. (United States)
Roberto Paiella, Agere Systems (United States)
Federico Capasso, Lucent Technologies/Bell Labs. (United States)
Chris Glazowski, Stevens Institute of Technology (United States)
Robert K. Murawski, Stevens Institute of Technology (United States)
Edward A. Whittaker, Stevens Institute of Technology (United States)
Clyde G. Bethea, Lucent Technologies/Bell Labs. (United States)
Harold Y. Hwang, Lucent Technologies/Bell Labs. (United States)
Deborah L. Sivco, Lucent Technologies/Bell Labs. (United States)
James N. Baillargeon, Lucent Technologies/Bell Labs. (United States)
Alfres Y. Cho, Lucent Technologies/Bell Labs. (United States)
H. C. Liu, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 4995:
Novel In-Plane Semiconductor Lasers II
Claire F. Gmachl; David P. Bour, Editor(s)

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