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Proceedings Paper

InGaAsP/InP distributed-feedback lasers for long-wavelength optical communication systems, lambda=1.55 um: electrical and optical noises study
Author(s): Bernard Pierre Orsal; Robert M. Alabedra; Philippe Signoret; H. Letellier
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Paper Abstract

Single longitudinal mode lasers emitting at 1.5 micrometers are attractive as light sources for low transmission loss (0.15 dB/km) and low dispersion (10 ps/nm/km) optical transmission systems. In distributed feedback (DFB) lasers, the corrugation grating near the active layer selects the emission wavelength. The realization of very good uniformity in composition and thickness on a large wafer allows a uniform Bragg wavelength. In this paper, the static characteristic and stability of DFB lasers emitting at (lambda) equals 1.55 micrometers are presented. It is important to know these data in order to compute the equivalent noise circuit of the DFB laser. The voltage noise of the laser diode Svd (V2/Hz) and the coherence function (gamma) vd-Iph2 between electrical noise and optical noise SIph (A2/Hz) are shown for the first time. Analytic expressions for the electrical noise spectral density Svd(f) and the optical noise spectral density SIph(f) agree with experimental results given by noise measurements.

Paper Details

Date Published: 1 September 1991
PDF: 12 pages
Proc. SPIE 1512, Infrared and Optoelectronic Materials and Devices, (1 September 1991); doi: 10.1117/12.47153
Show Author Affiliations
Bernard Pierre Orsal, Univ. des Sciences et Techniques du Languedoc (France)
Robert M. Alabedra, Univ. des Sciences et Techniques du Languedoc (France)
Philippe Signoret, Univ. des Sciences et Techniques du Languedoc (France)
H. Letellier, CIT Alcatel (France)

Published in SPIE Proceedings Vol. 1512:
Infrared and Optoelectronic Materials and Devices
Ahmed Naumaan; Carlo Corsi; Joseph M. Baixeras; Alain J. Kreisler, Editor(s)

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