Amplificadores Ãpticos a fibras dopadas com TÃlio para a banda "S"

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Due to the ever increasing amount of data traffic it has become necessary to expand the capacity of optical communication systems. This can be achieved by increasing the number of transmitted channels using Wavelength Division Multiplexing. Due to improvements of the manufacturing process of optical fibers, it is possible to use the entire low-loss spectral window of silica (1460nm â 1625nm), covering several transmission bands. To compensate for the losses in those transmission bands, optical amplifiers are necessary. Among them are: Raman amplifiers, Parametric amplifiers, Semiconductor amplifiers and Rare Earth doped fiber amplifiers. In the case of the S band (1460nm â 1530nm) the most promising is the Thulium Doped Fiber Amplier (TDFA), which is the main subject of this work. With the most common TDFA pump (1050nm) we built amplifiers with different Thulium Doped ZBLAN fibers and we achieved a small signal gain of 27dB and noise figures below 5dB, in agreement with previous reports in the literature. We also added an auxiliary pump (1550nm) which increases the ground state absorption, increasing the amplifier efficiency. We used Coherent Optical Frequency Domain Reflectometry (COFDR), to analyze for the first time the gain dynamics within the doped fiber when it is simultaneously pumped with both wavelengths. With this technique it is possible to optimize the doped fiber length in a non destructive way

ASSUNTO(S)

tdfa amplificadores Ãpticos comunicaÃÃes Ãpticas fibras Ãpticas engenharia eletrica fotÃnica

ACESSO AO ARTIGO

Documentos Relacionados