Enhancing the 3-dB Bandwidth via the Gain-Lever Effect in Quantum-Dot Lasers

Y. Li; N. A. Naderi; V. Kovanis; L. F. Lester

doi:10.1109/JPHOT.2010.2046481

IEEE Photonics Journal (Jan 2010)

Enhancing the 3-dB Bandwidth via the Gain-Lever Effect in Quantum-Dot Lasers

Y. Li,
N. A. Naderi,
V. Kovanis,
L. F. Lester

Affiliations

Y. Li: $^{1}$Center for High Technology Materials (CHTM), University of New Mexico, Albuquerque, NM, USA
N. A. Naderi: Center for High Technol. Mater. (CHTM), Univ. of New Mexico, Albuquerque, NM, USA
V. Kovanis: Sensors Directorate, $^{2}$U.S. Air Force Research Laboratory, OH, USA
L. F. Lester: Center for High Technol. Mater. (CHTM), Univ. of New Mexico, Albuquerque, NM, USA

DOI: https://doi.org/10.1109/JPHOT.2010.2046481
Journal volume & issue: Vol. 2, no. 3
pp. 321 – 329

Abstract

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We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-pole modulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB bandwidth is three times the free-running relaxation oscillation frequency in these types of laser structures, as opposed to 1.55 times in the case of conventional single-section lasers.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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