基于分布增益非线性光纤环镜的弱脉冲放大与压缩

J4 ›› 2012, Vol. 29 ›› Issue (1): 80-88.

基于分布增益非线性光纤环镜的弱脉冲放大与压缩

曹文华¹,徐平¹,刘颂豪²

1 深圳大学电子科学与技术学院，广东深圳 518060；
2 华南师范大学信息光电子科技学院，广东广州 510631

收稿日期:2011-03-03 修回日期:2011-03-30 出版日期:2012-01-28 发布日期:2012-01-28
通讯作者: 曹文华（1963-）安徽望江人,博士,教授,主要研究方向为非线性光纤光学、高速光纤通信系统。 E-mail:wcao@szu.edu.cn
基金资助:
广东省自然科学基金（06029820）资助

Amplification and compression of weak optical pulses using gain-distributed nonlinear fiber loop mirror

CAO Wenhua ¹, XU Ping¹, LIU Songhao²

1 College of Electronic Science and Technology, Shenzhen University, Shenzhen, Guangdong 518060, China；
2 School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510631, China

Received:2011-03-03 Revised:2011-03-30 Published:2012-01-28 Online:2012-01-28

摘要/Abstract

摘要：

已有研究发现，用分布增益非线性光纤环镜放大和压缩超短光孤子不仅能避免常规掺铒光纤放大器中由于非线性效应引起的孤子崎变，而且可克服绝热放大技术放大器长度随输入脉宽增大而指数规律增大的困难。我们进一步计算了弱脉冲在分布增益非线性光纤环镜中的放大和压缩过程。结果表明，对于峰值功率比基阶孤子低得多的弱脉冲输入，用分布增益非线性光纤环镜同样可实现无崎变的脉冲能量放大和脉宽压缩；而且，经环镜放大输出的脉冲也接近基阶孤子。然而，输入脉冲峰值功率越低，实现最佳放大所需的环镜总增益越大，高阶效应对放大结果的影响越显著。

关键词: 非线性光学, 光脉冲放大与压缩, 数值计算, 光孤子, 分布增益, 非线性光纤环镜

Abstract:

Recent work have shown that amplification and compression of ultrashort fundamental solitons in a gain-distributed nonlinear fiber loop mirror can not only avoid pulse distortion caused by nonlinear effects such as self-phase modulation etc., but also overcome the difficulty of adiabatic amplification that the amplifier length must increase exponentially with the input pulse-width. We study weak pulse amplification and compression in the gain-distributed nonlinear fiber loop mirror. Numerical results show that, as in the cases where the input pulses are fundamental solitons, distortion-free amplification and compression can also be realized when the input pulses have peak powers much lower than those of fundamental solitons, and that the amplified pulses are also close to fundamental solitons. The weaker the input pulse is, the larger the optimum gain of the loop mirror should be, and the higher-order effects have larger influences on the amplified pulses.

Key words: nonlinear optics, optical pulse amplification and compression, numerical simulation, optical solitons, distributed gain, nonlinear fiber loop mirror

中图分类号:

TN25
O437

曹文华徐平刘颂豪. 基于分布增益非线性光纤环镜的弱脉冲放大与压缩[J]. J4, 2012, 29(1): 80-88.

CAO Wenhua, XU Ping, LIU Songhao. Amplification and compression of weak optical pulses using gain-distributed nonlinear fiber loop mirror[J]. J4, 2012, 29(1): 80-88.

参考文献

[1] Agrawal G P. Effect of gain dispersion and stimulated Raman scattering on soliton amplification in fiber amplifiers[J]. Opt. Lett., 1991, 16(4): 226-228.
[2] Gross B, Manassah J T. Numerical solutions of the Maxwell-Bloch equations for a fiber amplifier[J]. Opt. Lett., 1992, 17(5): 340-342.
[3] Hodel W, Schutz J, Weber H P. Limits to the amplification efficiency of ultrashort fundamental solitons using Er-doped fibers[J]. Opt. Commun., 1992, 88(2-3): 173-179.
[4] Khrushchev I Y, Grudinin A B, Dianov E M, et al. Amplification of femtosecond pulses in Er3+-doped single-mode optical fibers[J]. Electron. Lett., 1990, 26(7): 456-458.
[5] Kurokawa K, Nakazawa M. Wavelength-dependent amplification characteristics of femtosecond erbium-doped optical fiber amplifiers[J]. Appl. Phys. Lett., 1991, 58(25): 2871-2873.
[6] Nakazawa M, Kurokawa K, Kubota H, et al. Femtosecond erbium-doped optical fiber amplifier[J]. Appl. Phys. Lett., 1990, 57(7): 653-655.
[7] Cao Wenhua, Wai P K A. Amplification and compression of ultrashort fundamental solitons in an erbium-doped nonlinear amplifying fiber loop mirror[J]. Opt. Lett., 2003, 28(4): 284-286.
[8] Wai P K A, Cao Wenhua. Simultaneous amplification and compression of ultrashort solitons in an erbium-doped nonlinear amplifying fiber loop mirror[J]. IEEE J. Quantum Electron., 2003, 39(4): 555-561.
[9] ?Cao Wenhua, Wai P K A. Picosecond soliton transmission by use of concatenated gain-distributed nonlinear amplifying fiber loop mirrors[J]. Appl. Opt., 2005, 44(35): 7611-7620.
[10] Lei Dajun, Fu Xiquan, Wen Shuangchun. Effect of gain bandwidth on the amplification of ultrabroad bandwidth pulse in an erbium-doped nonlinear amplifying fibre loop mirror[J]. J. Opt. A: Pure Appl. Opt. 2007, 9(1): 114-121.
[11] Hodel W, Peter D S, Weber H P. Chirped pulse amplification in Er-doped fibers[J]. Opt. Commun., 1993, 97(3-4): 233-238.
[12] Takada A, Iwatsuki K, Saruwatari M. Picosecond laser diode pulse amplification up to 12 W by laser diode pumped erbium-doped fiber[J]. IEEE Photonics Technol. Lett., 1990, 2(2): 122-124. [13]Gan Guirong, Luo Kaiji. Variational study on influence of high order dispersion and fifth order nonlinearity on propagation properties of Gaussian pulse in optical fibers [J]. Acta Optica Sinica (光学学报)，2008, 28(6): 1041-1046 (in Chinese).
[14] Luo Jun, Xu Ming, Zhu Zhiying, et al. Effect of TOD on ultrashort optical soliton self-frequency shifting [J]. Chinese Journal of Quantum Electronics (量子电子学报)，2010，27(1):88-93 (in Chinese).
[15]Gan Guirong. Influence of the third-order dispersion on the propagation properties of super-Gaussian pulses in optical fibers [J]. Chinese Journal of Quantum Electronics (量子电子学报)，2010,27(3)：378-384.
[16] Yang Zhenfeng , Yang Zhenjun , Hu Wei. Influence of chirp on spatial intensity distribution of hyperbolic secant pulsed beams [J]. Chinese Journal of Lasers (中国激光)，2007, 34(2): 225-228.