Novel gain-slope free erbium-doped fiber amplifier for L-band using thulium-doped fiber

被引：0

作者：

Kitabayashi, Tomoharu ^{[1
]}

Sakai, Tetsuya ^{[1
]}

Wada, Akira ^{[1
]}

机构：

[1] Optics and Electronics Laboratory, Fujikura Ltd., Sakura-shi 285-8550, Japan

来源：

IEICE Transactions on Electronics | 2002年 / E85-C卷 / 04期

关键词：

Optical fibers - Silica - Temperature - Thulium - Wavelength division multiplexing;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In modern high-capacity wavelength division multiplexing (WDM) transmission systems, there is increasing demand for large transmission capacity. To achieve this purpose, an L-band (1565-1625 nm) erbium-doped fiber amplifier (EDFA) is very effective method because the conventional silica-based EDF can be used. In EDFAs that used in WDM transmission systems, the gain flatness of EDFA is very important. A passive gain equalizer flattens the gain profile of EDFA. But the gain flatness in L-band deteriorates due to dynamic gain-tilt (DGT) and temperature gain-tilt (TGT) when the operating condition of the EDFA changes, while the EDFAs should maintain the gain flatness even if the operating condition has changed. To solve this problem, we propose an active gain-slope compensation technique for the L-band EDFA using a thulium-doped fiber (TDF). The EDFA actively gain-slope compensated by the TDF compensator keeps the gain profile constant for the wide input power range of more than 8 dB, a wide temperature range of 65°C without gain-tilt in a wavelength band between 1575 nm and 1610 nm. Furthermore, the EDFA keeps a low noise figure of less than 7.5 dB.

引用

页码：940 / 944