期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 37, 期 13, 页码 3365-3372出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2019.2915939
关键词
Erbium-doped fiber amplifier; gain control; multi-core fiber; space-division-multiplexing
资金
- National Institute of Information and Communications Technology (NICT), Japan under R&D of Innovative Optical Communication Infrastructure
- National Institute of Information and Communications Technology (NICT), Japan under Research and Development of Space-Division Multiplexing Photonic Node
This paper investigates gain controllability of cladding-and core-pumping hybrid-pumped single-stage and double-stage multi-core (MC) erbium-doped amplifiers (EDFAs) for changes in the input signal power per channel and number of channels. During the gain control, the core-pumping power is adjusted, whereas the cladding-pumping power is kept constant. Static characteristics are experimentally measured, and both kinds of hybrid-pumped MC-EDFAs are gain controlled with a small gain change for both the input signal changes. Dynamic characteristics are investigated by calculating the gain transient response of a surviving channel of the gain-controlled hybrid-pumped MC-EDFAs for signal channel dropping, and the response characteristics are compared with those of reference EDFAs whose erbium-doped fiber (EDF) has the same core parameters as those of EDF used in a conventional practical EDFA. It is shown that there is no significant difference in dynamic gain controllability between the hybrid-pumped MC-EDFAs and reference EDFAs even though the cladding-pumping power is not adjusted and kept constant. The results for the static and dynamic gain control characteristics suggest that constant cladding-pump power has little impact on gain controllability of the hybrid-pumped MC-EDFAs.
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