孙军强
博士研究生 教授
光电子工程系
掺铒光纤放大器及掺铒光纤激光器的自脉冲行为、自启动被动锁模及自调Q机理的研究
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- 姓名:孙军强
- 目前身份:在职研究人员
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师,
- 职称:高级-教授
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学科领域:
计算机应用
- 研究兴趣:掺铒光纤放大器及掺铒光纤激光器的自脉冲行为、自启动被动锁模及自调Q机理的研究
孙军强,博士,教授,博士生导师。1994年于华中理工大学(现为华中科技大学)光电子工程系获得博士学位。1994~1996年期间在华中理工大学电工博士后流动站从事博士后研究工作。出站后留校工作。1996年12月晋升为副教授,1998年7月破格晋升为教授。1999年被增聘为博士生导师。入选为华中理工大学“113”跨世纪优秀人才,1998年被选为湖北省跨世纪学术骨干。2000年9月至2001年9月在香港科技大学从事访问研究。曾从事掺铒光纤放大器及掺铒光纤激光器的自脉冲行为、自启动被动锁模及自调Q机理的研究、国家“863”高科技项目“半导体光放大器作波长转换器”、“偏振无关半导体光放大器”的研究。现主要承担国家“863”高科技项目“DWDM光交换节点无信道串扰技术的研究”以及国家自然科学基金项目“多波长激射环形掺铒光纤激光器”、 “多波长同时转换的新机理新技术研究”等多项研究工作。所取得的学术成果被PHOTONICS SPECTRA 杂志所报道;应邀担任了IEEE Photonics Technology Letters,Optics Communications,Chinese Physics Letters,光学学报,中国激光,半导体学报,电子学报等杂志的论文审稿人。现为国家自然科学基金委员会第十届信息科学部专家评审组成员,湖北省优秀学士学位论文评审专家。已在国内外正式发表论文100余篇,其中被SCI、EI、ISTP等权威索引物收录50余篇。获教育部提名教育部提名国家自然科学奖一等奖、湖北省自然科学二等奖各一次,获得国家发明专利一项。
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365
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成果数
10
【期刊论文】Multiwavelength Lasers Based on Semiconductor Optical Amplifiers
孙军强, Junqiang Sun, Ying Zhang, and Xinliang Zhang
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 14, NO.5, MAY 2002,-0001,():
-1年11月30日
Stable multiwavelength lasing is demonstrated with a novel laser, in which a semiconductor optical amplifier offers optical gain and cascaded sampled fiber gratings serve as a comb filter. Five lasing lines are obtained with a fixed wavelength spacing of 0.8 nm. Optical power fluctuations among the lasing lines are improved by adjusting reflectivity profile through the cascade of two sampled gratings.
Dense wavelength-division multiplexing,, multiwavelength lasers,, sampled fiber gratings,, semiconductor optical amplifiers.,
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【期刊论文】Relaxation of facet reflection restrictions in XGM wavelength converters
孙军强, Junqiang Sun*
Optics Communications 206(2002)67-75,-0001,():
-1年11月30日
Impacts of residual facet reflection on the performances of wavelength converters based on semiconductor optical amplifiers (SOAs) are theoretically investigated. Residual facet reflection definitely degrades the converter performance. A probe signal feedback scheme is introduced to improve the wavelength conversion characteristics. With the probe signal feedback, the wavelength conversion parameters, including extinction ratio, frequency chirping and modulation response, can be enhanced, and the facet reflection limits are relaxed due to the enhancement of carrier-photon interaction.
Wavelength conversion, Cross-gain modulation, Semiconductor optical amplifiers, Facet reflection, Signal feedback
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【期刊论文】Noninverted wavelength conversion using Fabry-Perot semiconductor optical amplifiers
孙军强, Junqiang Sun*, Xinliang Zhang, Deming Liu, Dexiu Huang
Optics Communications 207(2002)287-294,-0001,():
-1年11月30日
Noninverted wavelength conversion has been demonstrated using Fabry-Perot semiconductor optical amplifiers (FP-SOAs), and its mechanism is theoretically analyzed. The noninverted behavior is dominated by the shift of gain spectrum in the FP-SOA. Increasing the input optical power suppresses the spontaneous emission and drives the gain spectrum toward the longer wavelength side due to the enhancement of carrier-photon interaction. The performance of wavelength converters is improved owing to the resonant effect at the probe wavelength and this type of converter provides an effective approach for wavelength conversion in the future broadband networks.
Semiconductor optical amplifiers, Fabry-Perot cavity, Wavelength conversion, WDM systems
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孙军强, Junqiang Sun*, Wei Liu
Optics Communications 224(2003)125-130,-0001,():
-1年11月30日
Multiwavelength oscillation is demonstrated with a novel laser scheme, in which cascaded second-order nonlinearity in a periodically poled LiNbO3 (PPLN) waveguide is used to double the lasing lines. Twenty-two wavelengths approaching S- and L-bands are simultaneously achieved with a channel spacing of 1.6 nm, and the band separation is changeable. The number of wavelengths and channel spacing can be controlled by the adjustment of the tunable Fabry-Perot (FP) etalon and light polarization states in the laser cavity.
Second-order nonlinearity, Multiwavelength lasing, Erbium-doped fiber, Wavelength-division multiplexing
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【期刊论文】Multiwavelength erbium-dioed fiber lasers exploting polarization hole burning
孙军强, Junqiang Sun a, *, Junlin Qiu b, Dexiu Huang a
Optics Communications 182(2000)193-197,-0001,():
-1年11月30日
Simultaneous multiwavelength lasing is demonstrated exploiting intracavity polarization hole burning in an erbium-doped fiber laser. Experimental results indicate that polarization hole burning can be enhanced by the changes of the light polarization states and bias current of optical MQW waveguide which serves as reflector in the laser. Eleven wavelengths with 0.9 nm spacing are generated at room temperature.
Multiwavelength stimulation, Polarization hole burning, Erbium-doped fiber laser
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36浏览
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孙军强, Junqiang Sun, Wei Liu, Jing Tian, Member, IEEE, J. R. Kurz, and M. M. Fejer
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 15, NO.12, DECEMBER 2003,-0001,():
-1年11月30日
Ten-channel wavelength conversion is achieved by exploiting cascaded second-order nonlinearity in periodically poled LiNbO3 waveguides. No external pump input is required in the converter and conversion efficiency is improved due to the enhancement of pump and signal interaction. Approximate 70-nm conversion bandwidth is realized under pump power less than 25mW at 1550-nm band.
Nonlinear optics,, optical fiber communication,, wavelength conversion,, wavelength-division multiplexing.,
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32浏览
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【期刊论文】Influence of crosstalk on the scalability of WDM cross-connect networks
孙军强, J. Sun
IEE Proc.-Optoelectron., Vol. 149, No.2, April 2002,-0001,():
-1年11月30日
Intraband crosstalk contributions in three types of WDM cross-connect topologies based on the Benes architectures are identified. The crosstalk behaviours of the WDM networks are compared and discussed. It is demonstrated that the first-order crosstalk contributions are dominated by the crosstalk from the switching elements. The network scalability is analysed in terms of fibres, wavelengths and nodes. The results show that routing different wavelengths in each switching architecture in WDM cross-connect networks is a reasonable approach to achieve perfect performance in the presence of component crosstalk.
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孙军强, JUN QIA NG SUN*, DEMI NG LIU AND DEXIU HUNG
Optical and Quantum Electronics 36: 577-587, 2004.,-0001,():
-1年11月30日
A theoretical model of ultrashort pulse difference-frequency generation (DFG) is presented and developed with quasi-phase matching (QPM) gratings in the undepleted-pump, unamplified-signal approximation. An analytic solution to a case of ultrashort pulse pumped DFG process, including groupvelocity mismatching effects and input pulses with frequency chirp and time delay, is obtained. The influences of group-velocity mismatching effects and input signal pulse parameters on the conversion efficiency and output converted pulse characteristics are analyzed and discussed. The results indicate that the conversion efficiency is increased due to the enhancement of pump and signal interaction. The output pulse is inevitable compressed under pulsed pumping and can be compensated by introducing the initial frequency chirp and time delay.
all-optical signal process,, difference-frequency generation,, nonlinear optics,, optical waveguide
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孙军强, Wei Liua, *, Junqiang Sun a, Jonathan Kurz b
Optics Communications 216(2003)239-246,-0001,():
-1年11月30日
Bandwidth and tunability enhancement of difference frequency generation (DFG)-based wavelength conversion by introducing various distributing formats of p-phase shifting domains into the quasi-phase-matching (QPM) gratings is demonstrated, and the concise expressions describing the tuning curves in these cases are obtained for the first time. The results show not only the pump and signal bandwidth can be obviously broadened and flattened, but also diverse comblike pump-wavelength tuning curves with controllable channel spacing can be achieved by introducing periodically distributed p-phase shifting domains into the QPM gratings, which would greatly improve the tunability and practibility of DFG-based wavelength converters.
Optical wavelength conversion, Difference-frequency generation, Quasi-phase-matching
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孙军强, Sun Junqiang, Zhang Xinliang, Liu Deming, and Huang Dexiu
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS /Vol. 28, No.1, January 5 2001,-0001,():
-1年11月30日
With the consideration of cross-gain modulation (XGM) and probe-depletion (PD) effects, an analytical solution of four-wae mixing (FWM) between picosecond optical pulses in semiconductor optical amplifiers is developed based on our "splitting model" The results indicate that the effect of PD plays an important role in the FWM process for lower pump pulse energy and smaller pump-probe frequency detuning, while the effect of XGM dominates for the pump pulse with higher energy, a shorter pulsewidth, and a larger pump-probe frequency detuning.
four-wa-e mixing, nonlinearities, optical pulses, semiconductor optical amplifiers
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