InGaAsP/InP distributed-feedback lasers for long-wavelength optical communication systems, lambda=1.55 um: electrical and optical noises study

Bernard Pierre Orsal; Robert M. Alabedra; Philippe Signoret; H. Letellier

doi:10.1117/12.47153

1 September 1991 InGaAsP/InP distributed-feedback lasers for long-wavelength optical communication systems, lambda=1.55 um: electrical and optical noises study

Bernard Pierre Orsal, Robert M. Alabedra, Philippe Signoret, H. Letellier

Author Affiliations +

Proceedings Volume 1512, Infrared and Optoelectronic Materials and Devices; (1991) https://doi.org/10.1117/12.47153
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

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.

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Bernard Pierre Orsal, Robert M. Alabedra, Philippe Signoret, and H. Letellier "InGaAsP/InP distributed-feedback lasers for long-wavelength optical communication systems, lambda=1.55 um: electrical and optical noises study", Proc. SPIE 1512, Infrared and Optoelectronic Materials and Devices, (1 September 1991); https://doi.org/10.1117/12.47153

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