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The Journal of China Universities of Posts and Telecommunications 2014年第6期21卷 72-77页

作者： HU Xiao-ming yuAN Jin-hui yu chong-xiu WEI Shuai State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

A new concept of photonic crystal fiber（PCF） with high nonlinearity and flattened dispersion was designed. The PCF structure is indeed a hexagon lattice. The bigger air holes in the outer rings are used to confine the light field into the core region for enhancing the nonlinearity. The flattened dispersion can be achieved by adjusting the diameters of six smaller air holes in the first ring, and six micro air holes are inserted between smaller air holes for higher nonlinearity and the better flattened dispersion. By optimizing the size of the smaller and micro holes, the PCF can reach to high nonlinearity of 23.3 W-1·km^-1 and the low dispersion of 51.32 ps/（nm·km） with the fluctuation range of 0.98 ps/（nm·km）, which is within the wavelength range of 1 400 nm to 1 900 nm. The designed PCF can be used in important applications in realizing the Raman soliton self-frequency shift（RSSFS）.

关键词： PCF nonlinearity dispersion RSSFS

Analysis of S-SEED’s characteristics in optical switch

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 91-94页

作者： CAO Yong-sheng YIN Xiao-li XIN Xiang-jun yu chong-xiu Key Laboratory of Optical Communication and Lightwave Technologies Beijing University of Posts and Telecommunications Ministry of Education Beijing 100876 China

This article introduces the basic structure of a symmetric self-electrooptic effect device （S-SEED）, and applies the Kirchoff＇ s current law and a purely equivalent capacitive model, to analyze S-SEED＇s switch characteristics. Linear approximation and N-segment approximation are utilized to obtain S-SEED＇s voltage-time （V-T） and characteristics. Theoretical analysis is verified by simulations, and the results demonstrate that the precision of S-SEED＇s switch time can satisfy the requirement in applications with linear approximation. Moreover, the simulations compare S-SEED＇s switch characteristics with different input powers and input contrast ratios, which reveal that increasing input contrast ratio is an effective way to improve S-SEED＇s switch characteristics.

关键词： symmetry S-SEED optical switch V-T characteristics characteristic simulations

Performance Investigation of All-Optical NRZ-to-Manchester Format Conversion with SOA-MZI Based XOR Logic Gate

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Chinese Physics Letters 2011年第2期28卷 112-115页

作者： CHEN Jian-Bo ZHOU Rui ZHANG Qi yu chong-xiu XIN Xiang-Jun Institute of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876

All-optical format conversion between non-return-to-zero(NRZ)and the Manchester code is implemented by using an optical exclusive-OR(XOR)logic gate based on a semiconductor optical amplifier Mach-Zehnder Interferometer(SOA-MZI).There is 10 Gbit/s all-optical NRZ-to-Manchester conversion implemented in our simulation system and BER performance of the format conversion is *** performances of the converted Manchester coded signal are discussed in terms of transmission length and received optical power.

关键词： NRZ SOA Manchester

A Weighted Flow related to a Trudinger–Moser Functional on Closed Riemann Surface

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Acta Mathematica Sinica,English Series 2024年第9期40卷 2244-2262页

作者： Peng xiu yu School of Mathematics Renmin University of ChinaBeijing 100872P.R.China

In this paper,with(Σ,g)being a closed Riemann surface,we analyze the possible concentration behavior of a heat flow related to the Trudinger–Moser *** obtain a long time existence for the *** along some sequence of times t_(k)→+∞,we can deduce the convergence of the flow in H2(Σ).Furthermore,the limit function is a critical point of the Trudinger–Moser functional under certain constraint.

关键词： Trudinger-Moser inequality global convergence heat flow

包层空气孔孔径的不均匀性对微结构光纤非线性系数的影响

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中国激光 2006年第6期33卷 775-778页

作者：王健余重秀北京邮电大学电子工程学院

在基于微结构光纤(MOFs)的非线性装置中,光纤的非线性系数是一个很重要的参数,它受包层空气孔不均匀性的影响。用全矢量有限元法和误差理论分析了包层空气孔孔径的不均匀性对六角形高非线性微结构光纤非线性系数的影响。通过计算,得到... 详细信息

在基于微结构光纤(MOFs)的非线性装置中,光纤的非线性系数是一个很重要的参数,它受包层空气孔不均匀性的影响。用全矢量有限元法和误差理论分析了包层空气孔孔径的不均匀性对六角形高非线性微结构光纤非线性系数的影响。通过计算,得到了这种光纤HE1x1和HEy11模的非线性系数与每个空气孔孔径之间的关系,从而进一步得到了非线性系数的标准差与包层空气孔孔径标准差之间的关系。这样,在已知孔径的标准差时,很容易得到非线性系数的标准差。当孔径标准差与孔径设计值的比为5%时,HE1x1和HE1y1模非线性系数标准差与均匀孔径情况下非线性系数值的比分别为2.55%和3.06%。

关键词：光通信微结构光纤有限元法非线性系数标准差

Transmission Performance of the Optical Millimeter-wave Up-conversion Link Using a Phase Modulator

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Semiconductor Photonics and Technology 2009年第4期15卷 209-213页

作者： ZENG Jun-Ying yu chong-xiu School of Information Wuyi University Jiangmen 529020 CHN Key Laboratory ofOptical Communication and Lightwave Technologies of Ministry of Education School of Electronics Engineering Beijing University of Posts and Telecommunications Beijing 100876 CHN

Numerically analyzed is the transmission performance of the optical millimeter （mm）-wave generated by frequency up-conversion via a phase modulator along the dispersive fiber. 60 GHz ram-wave subcarrier（SC） signals can be obtained after fiber transmission, simultaneously, the phase-modulated signals can be converted to the intensity-modulated ones. The numerical results show that the optical ram-wave at fading loops has better performance, and the eye diagram still keeps open when optical mm-wave signal is transmitted over 98 km.

关键词： optical millimeter-wave up-conversion link phase modulator fiber transmission

Dynamic OADM Using Tunable Sampled Bragg Gratings Based on Vernier Effect

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Semiconductor Photonics and Technology 2006年第2期12卷 123-125页

作者： WANG Xu yu chong-xiu yu Zhi-hui Dept. of Physics and Information Engineering Henan Normal University Xinxiang 453002 CHN Dept. of Electronic Engineering Beijing University of Posts and Communications Beijing 100876 CHN

A novel dynamic optical add-drop multiplexer(OADM) scheme using tunable sampled fiber Bragg gratings(SFBG) by Vernier effect is firstly proposed. In this scheme, broad wavelength tuning range is achieved by only sligh... 详细信息

关键词： Tunable Sampled fiber Bragg gratings Vernier effect OADM

基于光纤光栅编解码和修正素数跳频码的一种光码分多址系统方案研究

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中国激光 2005年第8期32卷 1081-1085页

作者：王守源余重秀张琦北京邮电大学电子工程学院北京100876

在素数跳频码(PHCs)的基础上,研究了修正素数跳频码(MPHCs)的构造方法和性能,提出了基于光纤布拉格光栅(FBG)编解码实现修正素数跳频码这种二维地址码的光码分多址(OCDMA)系统方案。并通过对素数跳频码和修正素数跳频码这两种码字误码... 详细信息

在素数跳频码(PHCs)的基础上,研究了修正素数跳频码(MPHCs)的构造方法和性能,提出了基于光纤布拉格光栅(FBG)编解码实现修正素数跳频码这种二维地址码的光码分多址(OCDMA)系统方案。并通过对素数跳频码和修正素数跳频码这两种码字误码性能的分析,得到以下结论:对于相同的素数p,当系统误码率(BER)B≤10-9,p≥37时,修正素数跳频码所容纳的最大用户数大于素数跳频码;在光纤布拉格光栅阵列上修正素数跳频码所需要的编码光栅数相对素数跳频码减少(p-1)/2个,从而降低了光纤布拉格光栅阵列的制作难度。

关键词：光通信光码分多址素数跳频码修正素数跳频码光纤光栅误码率

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椭圆空气孔微结构光纤限制损耗的分析

物理学报 2007年第2期56卷 946-951页

作者：王健雷乃光余重秀北京邮电大学电子工程学院北京100876 北京交通大学理学院北京100044

以完美匹配层为边界条件,用复有限元法分析了椭圆空气孔三角形微结构光纤中基模的限制损耗.数值结果表明:当孔间距,空气填充率和空气孔环数增大时,基模的限制损耗减小.从计算结果还可以得出:限制损耗与基模的偏振有关,随着孔间距,空气... 详细信息

以完美匹配层为边界条件,用复有限元法分析了椭圆空气孔三角形微结构光纤中基模的限制损耗.数值结果表明:当孔间距,空气填充率和空气孔环数增大时,基模的限制损耗减小.从计算结果还可以得出:限制损耗与基模的偏振有关,随着孔间距,空气填充率和孔的椭圆率的增大,y偏振模与x偏振模的限制损耗比也增大.最后,提出了两种可实现光单偏振,单模传输的高非线性微结构光纤.

关键词：微结构光纤限制损耗复有限元法完美匹配层

Widely Wavelength-Tunable Blue-Shifted Dispersive Waves for Broadband Visible Wavelength Generation in a Photonic Crystal Fiber Cladding

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Chinese Physics Letters 2012年第10期29卷 62-64页

作者： yuAN Jin-Hui SANG Xin-Zhu yu chong-xiu SHEN Xiang-Wei WANG Kui-Ru YAN Bin-Bin HAN Ying ZHOU Gui-Yao HOU Lan-Tian State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876 Institute of Infrared Optical Fibers and Sensors Physics DepartmentYanshan UniversityQinhuangdao 066004 School of Information and Optoelectronic Science and Engineering South China Normal UniversityGuangzhou 510006

Blue-shifted dispersive waves(DWs)are efficiently generated from the red-shifted solitons by coupling the 120 fs pulses into the fundamental mode of the multi-knots of a photonic crystal fiber *** the femtosecond pulses at the wavelength of 825 nm and the average power of 300 mW are coupled into knots 1–3,the conversion efficiencyηDW of 32%and bandwidth BDW of 50 nm are *** ultrashort pulses generated by the DWs can be tunable over the whole visible wavelength by adjusting the wavelengths of the pump pulses coupled into different *** can be believed that this widely wavelength-tunable ultrashort visible pulse source has important applications in ultrafast photonics and resonant Raman scattering.

关键词： tunable ultrashort pump