中国光学快报(英文版)
中國光學快報(英文版)
중국광학쾌보(영문판)
CHINESE JOURNAL OF LASERS
2003年
9期
532-534
,共3页
王安廷%邢美术%陈光辉%杨文奎%明海%谢建平%吴云霞
王安廷%邢美術%陳光輝%楊文奎%明海%謝建平%吳雲霞
왕안정%형미술%진광휘%양문규%명해%사건평%오운하
We have proposed and demonstrated a double-pass ytterbium-doped fiber amplifier using an optical circulator and a fiber Bragg grating as reflector. When the signal has passed through the ytterbium-doped fiber once, it reflects off a 0.2-nm passive fiber Bragg grating filter. This reduces amplified spontaneous emission (ASE) noise from the first pass. The input signal light is amplified both forward and backward through ytterbium-doped fiber. With this double-pass configuration, 1053.15-nm unsaturated signal gain of 28 dB, gain coefficient of 1.1 dB/mW, and noise figure of less than 4 dB are achieved at 977-nm pump power of 68 mW. It is also found that this double-pass configure provides enhancing gain coefficient and improving noise figure by comparison with single-pass configuration.
