Evaluation of Slow Light Periodic Signals Considering the Distortion in EDF

Based on the fundamental harmonic phase delay, a new definition of fundamental harmonic fractional delay （FHFD） is proposed to evaluate slow light with the consideration of signal distortion, to eliminate the dependence on the choice of the reference point. By solving the rate equation of erbium-dop...

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Bibliographic Details
Published in:Chinese physics letters 2014-03, Vol.31 (3), p.82-85
Main Authors: Wang, Fu, Wu, Chong-Qing, Wang, Zhi, Liu, Guo-Dong, Liu, Lan-Lan, Sun, Zhen-Chao
Format: Article
Language:English
Subjects:
Delay
Distortion
EDF
Fibers
Harmonics
Mathematical analysis
Modulation
Signal distortion
Simulation
信号传播
信号失真
光周期信号
掺铒光纤
相位延迟
评估
速率方程
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Summary:Based on the fundamental harmonic phase delay, a new definition of fundamental harmonic fractional delay （FHFD） is proposed to evaluate slow light with the consideration of signal distortion, to eliminate the dependence on the choice of the reference point. By solving the rate equation of erbium-doped fiber （EDF）, it is shown that the slow light always accompanies the signal distortion when the periodic signal propagates in EDF, and FHFD depends on the signal distortion, as well as the average input power, the modulation depth and the length of EDF. The results of simulations and experiments indicate that the definition of FHFD is reasonable and effective to evaluate the slow light of periodic signals.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/3/034207