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A proposal of a WDM transmission system using three wavelength bands of 1.3, 1.47, and 1.55 μ m employing optical amplifers
Author(s) -
Yamashita Ikuo,
Seikai Shigeyuki,
Sawa Shinnosuke
Publication year - 2001
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.6
Subject(s) - wavelength division multiplexing , optical amplifier , wavelength , optics , crosstalk , amplifier , transmission (telecommunications) , optoelectronics , optical fiber , raman amplification , materials science , physics , telecommunications , computer science , laser , cmos
A WDM transmission system using the wavelength bands of 1.3, 1.47, and 1.55 μm is proposed. Selection of these wavelengths makes it possible to use off‐the‐shelf optical couplers and to apply known types of amplifiers. Among three kinds of optical amplifiers, Tm 3+ ‐doped fiber amplifiers for the 1.47 μm band are constructed and their basic properties are determined experimentally. Crosstalk between the 1.47‐ and 1.55‐μm bands originating from insufficient isolation of the couplers and Raman scattering becomes negligibly small by considering the combination of the couplers and reducing the input optical power to the single mode fiber (SMF) to below 6 dBm. Experiments on repeaterless transmission over a 50‐km SMF show error‐free performance in the 10 Gb/s × 6 WDM case where two light signals of different wavelength are launched in each band. Finally, the utility of the 1.47‐μm band is discussed theoretically. © 2001 Scripta Technica, Electr Eng Jpn, 135(2): 43–51, 2001