Open AccessLow noise figure all-optical gain-clamped parallel C+L band Erbium-doped fiber amplifier using an interleaver
Author(s) -
Luo Yi,
Li Zhan,
C. S. Taung,
Shuai Luo,
Weisheng Hu,
Y. K. Su,
Yuxing Xia,
Lufeng Leng
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.004519
Subject(s) - optical amplifier , optics , lasing threshold , amplified spontaneous emission , materials science , fiber bragg grating , c band , noise figure , optoelectronics , erbium , amplifier , physics , optical fiber , laser , cmos
A low noise figure (NF), all-optical gain-clamped C+L band erbium-doped fiber amplifier (EDFA) has been demonstrated. A parallel configuration is employed to avoid the crosstalk between the C- and L-band signals. Half of the amplified spontaneous emission from the output signal is filtered by an interleaver and fed back to the parallel EDFA to form lasing cavity. Two lasers in the C- and L-band, respectively, formed in the cavity clamp the C- and L-band signals simultaneously. In the L-band, the double-pass configuration with a fiber Bragg grating is used to improve the gain and NF. Furthermore, co-propagation of the signal and the lasing power leads to a low NF, while the amplified signals are exported separately from the lasing power. Finally, a wide gain-clamping range up to -10dBm and ~5.5dB NF are obtained.