频率失谐对掺镱光纤放大器中光脉冲传输特性的影响

J4 ›› 2011, Vol. 28 ›› Issue (1): 122-126.

• 纤维与波导光学 • 上一篇

频率失谐对掺镱光纤放大器中光脉冲传输特性的影响

周小红¹,王泽勇¹,王黎¹,高晓蓉¹,罗斌²

1 西南交通大学物理科学与技术学院，四川成都 610031；
2 西南交通大学信息科学与技术学院，四川成都 610031

收稿日期:2010-07-19 修回日期:2010-08-26 出版日期:2011-01-28 发布日期:2011-01-14
通讯作者: 周小红（1966-），四川绵阳人，副教授，博士。主要从事光通信、激光传输和半导体激光器方面的研究。 E-mail:z660414@sina.com

Influence of frequency detuning on propagation characteristics of optical pulse in ytterbium-doped fiber amplifier

ZHOU Xiao-hong¹, WANG Ze-yong¹, WANG Li¹, GAO Xiao-rong¹, LUO Bin²

1 College of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
2 College of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Received:2010-07-19 Revised:2010-08-26 Published:2011-01-28 Online:2011-01-14

摘要/Abstract

摘要：

为了研究光脉冲在掺镱光纤放大器中的放大传输特性，建立了光脉冲在分布式光纤放大器中的传输方程，采用分步傅里叶变换法数值模拟了光脉冲的传输状态，并着重讨论了频率失谐对光脉冲特性的影响。结果表明：对于掺镱光纤放大器，在介质的色散长度远远小于非线性长度时，随着在放大器中的传输，光脉冲在放大的同时被展宽，脉冲中心出现峰值，其频谱加宽；当出现频率失谐时，光脉冲放大能力减弱，脉冲失去对称性，并且窄化。若光脉冲中心频率沿不同的方向偏离介质增益峰值频率，脉冲变形规律不同。因此在设计放大系统时应该考虑光纤放大器的色散以及频率失谐对其传输特性的影响。

关键词: 光通信, 传输特性, 分步傅里叶变换法, 光脉冲, 掺镱光纤放大器, 频率失谐

Abstract:

In order to study the amplification and propagation characteristics of optical pulse in ytterbium-doped fiber amplifier, the propagation equation of optical pulse in distributed fiber amplifier is established. Using split-step Fourier transform method, the propagation state of optical pulse is simulated, and influence of frequency detuning on the characteristics of optical pulse is discussed especially. The results show that optical pulse is amplified and broaded simulataneously in ytterbium-doped fiber amplifier, so it has a deformed profile and a broadening power spectrum. For the case of frequency detuning, the amplification of optical pulse has declined and the pulse has lost the symmetry the input pulse has. If the center frequency of optical pulse deviates from the gain peak frequency in different directions, the deformation law of pulse is different. Therefore, the influence of the dispersion and nonlinear effect of fiber amplifier and frequency detuning on the propagation characteristics of optical pulse should be considered in the design of amplification system.

Key words: optical communication, propagation characteristics, split-step Fourier transform method, optical pulse, ytterbium-doped fiber amplifier, frequency detuning

中图分类号:

TN253

周小红王泽勇王黎高晓蓉罗斌. 频率失谐对掺镱光纤放大器中光脉冲传输特性的影响[J]. J4, 2011, 28(1): 122-126.

ZHOU Xiao-hong, WANG Ze-yong, WANG Li, GAO Xiao-rong, LUO Bin. Influence of frequency detuning on propagation characteristics of optical pulse in ytterbium-doped fiber amplifier[J]. J4, 2011, 28(1): 122-126.

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频率失谐对掺镱光纤放大器中光脉冲传输特性的影响

Influence of frequency detuning on propagation characteristics of optical pulse in ytterbium-doped fiber amplifier

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