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Proceedings Paper

Electrical noise power spectrum behavior around threshold in DBR two- or three-section tunable lasers emitting around 1.55 µm
Author(s): Mikhael Myara; Philippe Signoret; Jean-Philippe Tourrenc; Joel Jacquet; Bernard Pierre Orsal; Robert M. Alabedra
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Paper Abstract

Medium frequency (100kHz - 1MHz) measurements of electrical noise power spectrum densitiy in DBR tunable lasers show particular behaviour around threshold, compared to classical edge-emitting structures. In this paper, we consider structures in which tunability is made by current injection. Standard monomode (SMSR > 40 DB) non tunable DBR lasers Noise Level follow a global shot-noise tendancy, except around the laser threshold current level (called Ith). In these structures, a strong excess of noise is classically established at Ith. Next, at Ith+epsilon, the noise level goes down again to the shot noise level. In DBR tunable lasers, this behaviour is exactly the same, except that epsilon grows up when the current level in the Bragg section gets stronger. The aim of this paper is to establish a link between the 'epsilon' factor and the current level in the Bragg section.

Paper Details

Date Published: 16 May 2003
PDF: 8 pages
Proc. SPIE 5111, Fluctuations and Noise in Photonics and Quantum Optics, (16 May 2003); doi: 10.1117/12.500091
Show Author Affiliations
Mikhael Myara, Univ. Montpellier II (France)
Philippe Signoret, Univ. Montpellier II (France)
Jean-Philippe Tourrenc, Univ. Montpellier II (France)
Joel Jacquet, Alactel Research and Innovation (France)
Bernard Pierre Orsal, Univ. Montpellier II (France)
Robert M. Alabedra, Univ. Montpellier II (France)

Published in SPIE Proceedings Vol. 5111:
Fluctuations and Noise in Photonics and Quantum Optics
Derek Abbott; Jeffrey H. Shapiro; Yoshihisa Yamamoto, Editor(s)

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