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An all-optical buffer based on polarization rotation in an EAM

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Chinese Physics B 2013年第8期22卷 416-420页

作者：王葵如匡海王拥军苑金辉颜玢玢 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

A theoretical model of the refractive index changes of the TE and TM modes in an electro-absorption modulator （EAM） is deduced. The photon absorption and refractive index changes are analyzed numerically. The influence of pump intensity on the phase difference between the TE and TM modes is studied. The polarization rotation effect is obtained in the EAM, and a novel all-optical fiber loop buffer is designed.

关键词： electro-absorption modulator polarization rotation effect all-optical fiber loop buffer

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一种新型的多包层光子晶体光纤的分析方法

物理学报 2008年第5期57卷 3011-3015页

作者：魏东宾周桂耀赵兴涛苑金辉孟佳王海云侯蓝田燕山大学红外光纤与传感研究所秦皇岛066004

传统有效折射率方法只能模拟具有相同空气孔大小的单包层光子晶体光纤.针对这一问题,提出了一种改进的有效折射率法,能够计算具有不同孔径的多包层光子晶体光纤的传输特性.并用此方法对三包层光子晶体光纤的基模有效折射率和色散等特性... 详细信息

传统有效折射率方法只能模拟具有相同空气孔大小的单包层光子晶体光纤.针对这一问题,提出了一种改进的有效折射率法,能够计算具有不同孔径的多包层光子晶体光纤的传输特性.并用此方法对三包层光子晶体光纤的基模有效折射率和色散等特性进行了数值模拟,结果与多极法模拟出的结果符合得很好.这种改进的有效折射率法拓展了传统有效折射率法的适用范围,对快速准确地分析和设计具有不同传输特性的多包层光子晶体光纤提供了理论依据.

关键词：光子晶体光纤多包层有效折射率方法色散

Design on a highly birefringent and nonlinear photonic crystal fiber in the C waveband

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Chinese Physics B 2014年第4期23卷 310-313页

作者：李端明周桂耀夏长明王超苑金辉 Laboratory of Nanophotonic Functional Materials and Devices South China Normal University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

In this paper, a novel photonic crystal fiber （PCF） with high birefringence and nonlinearity is designed. The charac- teristics of birefringence, dispersion and nonlinearity are studied by using the full-vector finite element method （FVFEM）. The numerical results show that the phase birefringence and nonlinear coefficient of PCF can be up to 4.51× 10-3 and 32.8972 ***-1 at 1.55 μm, respectively. The proposed PCF could be found to have important applications in the polarization-dependent nonlinear optics such as the pulse compress and reshaping in the C waveband.

关键词： high birefringence nonlinear coefficient zero dispersion wavelength full-vector finite elementmethod

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光子晶体光纤中超连续谱的形成及其影响因素

激光与光电子学进展 2008年第11期45卷 42-47页

作者：李蕊侯蓝田梁丹华苑金辉李霞燕山大学信息科学与工程学院红外光纤与传感研究所河北秦皇岛066004

介绍了在光子晶体光纤(PCF)中产生超连续谱(SC)的发展现状及应用背景,从广义非线性薛定谔方程入手,讨论了超连续谱的形成机理,并从光子晶体光纤色散特性、脉冲参数等方面探讨了对超连续谱形成的影响,从而可以控制超连续谱的形成。

关键词：光子晶体光纤飞秒激光超连续谱非线性色散

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光子晶体光纤的研究新进展

光子晶体光纤的研究新进展

A flexible receiver with fiber optical parametric amplifier in OCDMA-FSO communication system

中国光学学会2011年学术大会

作者：申向伟余重秀苑金辉信息光子学与光通信国家重点实验室北京邮电大学

PCF作为新一代优异的光学介质,在非线性光学、光纤通信、全光器件等方面具有广泛的应用前景。世界各国对PCF的研究如火如荼,在PCF的色散、带隙、非线性特性及应用方面均有了长足进展。本文介绍了国内外光子晶体光纤（photonic crystal f...

PCF作为新一代优异的光学介质,在非线性光学、光纤通信、全光器件等方面具有广泛的应用前景。世界各国对PCF的研究如火如荼,在PCF的色散、带隙、非线性特性及应用方面均有了长足进展。本文介绍了国内外光子晶体光纤（photonic crystal fiber,PCF）研究的新进展,涉及到大负色散PCF研究、光子带隙型PCF的带隙与模式研究、利用PCF的波长可调节有效频率变换、基于PCF的可见光波段平坦超连续谱（Supercontinuum,SC）和高效宽带切伦科夫辐射（Cherenkov Radiation,CRs）的产生等。PCF的大负色散实现了-55000 ps/km/nm的高阶模色散值、-36000 ps/km/nm的基模色散值;对光子带隙型PCF的带隙与模式研究,有助于解决光波的非线性传输控制和光与物质的非线性相互作用等问题;利用PCF及其非线性效应,实现了波长可调节且高效的频率变换、可见光波段平坦SC和高效宽带CRs的产生等。文中还介绍了本实验室对PCF特性及应用的研究现状,包括PCF的数值分析新方法,极大负色散的PCF、反共振引导型PCF（Anti-resonance guiding,ARG-PCF）和三种高非线性PCF的研究与设计,利用所设计的新型PCF,在实验上实现波长可调节的高效反斯托克斯信号转换,产生了470至805 nm范围内的平坦SC,产生了可见光波段高效和宽带的CRs等。分析和总结PCF的这些最新研究进展,希望能与研究同行们在PCF研究上深入研讨、切磋和进取,从而挖掘PCF的更多优异特性并开拓其更广泛的应用领域。

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来源： cnki会议评论

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Optoelectronics Letters 2014年第6期10卷 406-410页

作者：夏民苑金辉桑新柱尹霄丽饶岚余重秀 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Tele-communications School of Electronic Engineering Beijing University of Posts and Telecommunications

A new receiver is proposed, which uses the fiber optical parametric amplifier(FOPA) in optical code division multiple access(OCDMA) over free space optic(FSO) communication system. The noise tolerance as the performance index in this receiver is derived. The receiver can not only improve the noise tolerance but also change the pump data conveniently for adapting to the length variation of the coding sequence under a complex and fast-changing weather condition. The influence of different factors on the noise tolerance is analyzed, and a significant improvement of about 18.77 d B for the noise tolerance can be achieved when the pump power and the length of coding sequence are 5 W and 256, respectively.

关键词： Code division multiple access Codes (symbols) Fiber amplifiers Optical fiber communication

Complete leaky mode coupling in dual-core photonic crystal fibre based on the coupled-mode theory

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Chinese Physics B 2011年第6期20卷 237-242页

作者：苑金辉余重秀桑新柱张锦龙周桂耀侯蓝田 Key Laboratory of Information Photonics and Optical Communications of Ministry of Education Beijing University of Posts and Telecommunications Institute of Infrared Optical Fibres and Sensors College of Information Science and Engineering Yanshan University

This paper theoretically investigates the dependence of leaky mode coupling between inner core fundamental mode and outer core defect mode on phase and loss matching in pure silica dual-core photonic crystal fibres with the multi-pole method. The complete mode coupling can take place when both the phase and loss matching conditions are satisfied at the avoided anti-crossing wavelength. It shows the influences of cladding structure parameters including the diameters of cladding air holes d1, diameters of outer core holes d2 and hole to hole pitch A on the characteristics of leaky modes coupling. The coupled-mode theory is used to analyse the mode transition characteristics and the complete coupling can be clearly indicated by comparing the real and imaginary parts of propagation constant of the leaky modes.

关键词： dual-core photonic crystal fibres complete leaky mode coupling multi-pole method coupled-mode theory

Analysis of the special hollow-core photonic crystal fibre by finite element method

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Chinese Physics B 2008年第10期17卷 3779-3784页

作者：孟佳侯蓝田周桂耀高飞苑金辉魏东宾 College of Information Science and Engineering Institute of Infrared Optical Fibers and Sensors Yanshan University

Two kinds of fabricated hollow-core photonic crystal fibres （HC-PCFs） arc studied using finite element method （FEM） because the structures of the fibres are special, Normalized transmission spectra and transverse intensity distribution of the modes are calculated and measured. And the dispersion characteristics of these two kinds of HC- PCFs were analysed from 400 nm to 800 nm. Simulated and measured results show that the special structure could affect the properties of HC-PCFs, By comparing the simulated values with the measured results, it can be clarified that FEM is feasible and accurate for analysing photonic crystal fibres whose structures are irregular and complex.

关键词： hollow-core photonic crystal fibre normalized transmission spectrum dispersion finite element method

Highly efficient Cherenkov radiation generation in the irregular point of hollow-core photonic crystal fiber

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Chinese Physics B 2012年第11期21卷 222-226页

作者：申向伟苑金辉桑新柱余重秀饶兰夏民韩颖夏长明侯蓝田 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts&Telecommunications Institute of Infrared Optical Fibers&Sensors

Highly efficient Cherenkov radiation （CR） is generated by the soliton self-frequency shift （SSFS） in the irregular point of a hollow-core photonic crystal fiber （HC-PCF） in our laboratory. The impacts of pump power and wavelength on the CR are investigated, and the corresponding nonlinear processes are discussed. When the average power of the 120 fs pump pulse increases from 500 mW to 700 mW, the Raman soliton shifts from 2210 nm to 2360 nm, the output power of the CR increases by 2.3 times, the maximum output power ratio of the CR at 539 nm to that of the residual pump is calculated to be 24.32：1, the width of the output optical spectrum at the visible wavelength broadens from 35 nm to 62 nm, and the conversion efficiency η of the CR in the experiment can be above 32%.

关键词： Cherenkov radiution hollow-core photonic crystal fiber soliton self-frequency shift