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High-Power Low-Noise Fiber Brillouin Amplifier for Tunable Slow-Light Delay Buffer

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4 Author(s)
Liang Xing ; Dept. of Phys., Shanghai Jiao Tong Univ., Shanghai ; Li Zhan ; Shouyu Luo ; Xia, Yuxing

A high-power low-noise fiber Brillouin amplifier (FBA) has been demonstrated for slow-light delay buffer. Its features including gain, gain saturation, and noise figure (NF), have been characterized. Among them, the gain saturation is highlighted because it is a fundamental limitation for FBA-based slow-light buffer. It is testified that the gain saturation is more easily achieved for lower signal-to-pump ratio (SPR), and the NF is reduced at higher pump level when below Brillouin threshold. The experiment demonstrated that up to 20-ns delay enhancement could be obtained in this high-power FBA for a -30-dBm input signal, as well as with low NF. Besides, the analysis on how the performance of the high power FBA affects the slow-light delay buffer has been presented.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:44 ,  Issue: 12 )