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Study on a novel linear-cavity erbium-doped fiber laser using a 3 dB coupler as the reflecting mirror

Study on a novel linear-cavity erbium-doped fiber laser usin...

引用

2011 International Conference on Electronics and Optoelectronics, ICEOE 2011

作者： Li, Jian Liu, Zhiming Ning, Tining Department of Communication and Signalling Beijing Railway Bureau Beijing China Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing China

ISBN: (纸本)9781612842738

A novel linear-cavity erbium-doped fiber laser is proposed and demonstrated. By using a 3 dB coupler as the reflecting mirror and an uniform fiber Bragg grating as the partial reflecting mirror and the wavelength selector, a stable laser output is obtained at room temperature. The full-width at half maximum, the side mode suppression ratio and the output power fluctuation are measured to be small than 0.014 nm, better than 40 dB and less than 0.43 dB, respectively. Furthermore, the lasing wavelength doses not drift in four hours. © 2011 IEEE.

关键词： Fiber Bragg gratings

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A second-order approximation coupling model of fused biconical tapered fiber coupler

A second-order approximation coupling model of fused biconic...

引用

International Conference on advanced Infocomm Technology 2011, ICAIT 2011

作者： Liu, Chao Pei, Li Gao, Song Kang, Ze-Xin Sun, Jiang Yan, Jun-Fang Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781849194730

The paper presents a mathematical model of the fused tapered fiber coupling theory, which considers the practical position of fibers in the coupling region. Based on the theory of regular optical waveguide, attention is concentrated on the second-order approximations of the propagation constant and coupling coefficient. Experimental studies of fiber coupler are investigated in detail by fabricating couplers. It is shown that the experimental data agree with the theoretical analysis with regard to the coupling ratio.

关键词： Fibers

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Radiation and scattering properties of the dual-port fed differential microstrip antennas

Radiation and scattering properties of the dual-port fed dif...

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2011 4th IEEE International Symposium on Microwave, Antenna, Propagation and emc Technologies for Wireless Communications, MAPE 2011

作者： Xu, Weiwei Wang, Junhong Zhang, Zhan Chen, Meie Key Lab. of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University BeiJing 100044 China Institute of Lightwave Technology BeiJing Jiaotong University BeiJing 100044 China

ISBN: (纸本)9781424482665

For traditional differential fed microstrip patch antenna, the phase difference between the two excitation ports is set to 180°. In this paper, the radiation and scattering characteristics of differential microstrip antenna fed by phase difference out of 180°are studied. The variations of the co-polarization and cross-polarization radiations of the antenna are analyzed, and the bi-static and mono-static scattering properties of the antenna are also studied. The radiation and scattering characteristics of the two port fed differential antenna are compared with those of the single port fed antennas. Research results show that it is possible to find a phase difference of excitation of dual-port fed antenna that gives low cross-polarization radiation and low scattering. © 2011 IEEE.

关键词： Microstrip antennas

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Low-profile penta-band monopole antenna for mobile communication applications

Low-profile penta-band monopole antenna for mobile communica...

引用

2011 4th IEEE International Symposium on Microwave, Antenna, Propagation and emc Technologies for Wireless Communications, MAPE 2011

作者： Han, Yu Wang, Junhong Chen, Meie Zhang, Zhan Key Lab. of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781424482665

An internal monopole antenna with compact size is proposed in this paper, which can be applied to mobile communications, and its frequency band covers GSM850, GSM900, DCS, PCS, UMTS bands simultaneously. It is comprised of a driven monopole and a coupled loop strip. By inserting a folded slit in the driven rectangular patch, two wide bands are achieved. The antenna has a small area of 48x12 mm2, and is easy to be integrated into the mobile device. Details of the antenna design and experimental results are presented. © 2011 IEEE.

关键词： Monopole antennas

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A second-order approximation coupling model of fused biconical tapered fiber coupler

A second-order approximation coupling model of fused biconic...

引用

International Conference on advanced Infocom Technology 2011 (ICAIT 2011)

作者： Chao Liu Li Pei Song Gao Ze-xin Kang Jiang Sun Jun-fang Yan Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University 100044 China

ISBN: (纸本)9781622760350

关键词： fiber coupler fused taper second-order approximation coupling ratio Optical fibre couplers tapered fiber Propagation constant couplers coupling coupling ratio Theoretical analysis theories Mathematical Model Fiber

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Frequency-octupling millimeter-wave generation based on optical two-step self-heterodyne technique

Frequency-octupling millimeter-wave generation based on opti...

引用

International Conference on advanced Infocom Technology 2011 (ICAIT 2011)

作者： Song Gao Li Pei Tigang Ning Jing Li Chunhui Qi Chao Liu Junfang Yan Institute of Lightwave Technology Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University 100044 China

ISBN: (纸本)9781622760350

A cost-effective frequency-quadrupling scheme which is capable of generating high frequency millimeter-wave (mm-wave) signal is theoretically proposed. By employing optical two-step self-heterodyne technique, this scheme is easy to realize and have a high efficiency. Base on this scheme, a frequency-octupling frequency component is generated. This proposed scheme is a viable solution for the future ultra-high frequency mm-wave applications.

关键词： millimeter wave millimetre wave generation Wave generation optical Scheme base on

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Design and optimization of an ultra-broadband singlepolarization single-mode photonic crystal fiber with large mode area

Design and optimization of an ultra-broadband singlepolariza...

引用

全国第15次光纤通信暨第16届集成光学学术会议

作者： Shuqin Lou Liwen Wang Weiguo Chen Honglei Li Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University Institute of Lightwave Technology Beijing Jiaotong University

Since the first work example of photonic crystal fibers(PCFs) was reported in 1996,PCFs has been extensively studied due to their unique properties and flexible design *** polarization-maintaining(PM) PCFs have been presented and their modal birefringence reaches to 10 orders which is one order of magnitude higher than that of conventional PM *** polarization mode coupling and the PMD still exists in these fibers and thus the stability of polarized modes would be affected.

关键词： fiber optics photonic crystal fiber single polarization single mode large mode field area

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Optimum signal constellation design for rotationally symmetric optical channel with coherent detection

Optimum signal constellation design for rotationally symmetr...

引用

Optical Fiber Communication Conference and Exhibit

作者： Zhang, Jianyong Djordjevic, Ivan B. Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China University of Arizona Department of Electrical and Computer Engineering United States Key Lab of Alloptical Network and Advanced Telecommunication Network EMC Beijing Jiaotong University Beijing China

We present an optimum signal-constellation design (OSCD) method to obtain the optimum probabilities and mass points by split-step method. The OSCD increases channel capacity by 1.02bits/channel use after 2000 km of SM... 详细信息

ISBN: (纸本)9781457702136

关键词： Optical fibers

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Study on a Novel Linear-cavity Erbium-doped Fiber Laser Using a 3 dB Coupler as the Reflecting Mirror

Study on a Novel Linear-cavity Erbium-doped Fiber Laser Usin...

引用

2011 International Conference on Electronics and Optoelectronics(2011电子学与光电子学国际会议 ICEOE 2011)

作者： Jian Li Tining Ning Zhiming Liu Department of Communication and Signalling Beijing Railway Bureau Beijing China Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong Universi

ISBN: (纸本)9781612842752

关键词： erbium-doped fiber laser linear-cavity 3 dB coupler fiber Bragg grating

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Design and optimization of an ultra-broadband single-polarization single-mode photonic crystal fiber with large mode area

Design and optimization of an ultra-broadband single-polariz...

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中国光学学会纤维光学与集成光学专业委员会全国第15次光纤通信暨第16届集成光学学术会议

作者： Shuqin Lou Liwen Wang Weiguo Chen Honglei Li Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

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