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Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors

作者： Wang, Liwen Lou, Shuqin Chena, Weiguo Li, Honglei Guo, Tieying 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

It is very important for the photonic crystal fiber character to monitor its properties synchronously during the fabrication process so that a series of draw parameters can be efficiently optimized as PCF used to be produced. In this paper, we reported an efficient method to monitor PCF properties with the cross-section of the photonic crystal fiber collected by microscope and CCD. The structure parameters of the cross-section of PCF are fast picked up by digital process technology and the properties of the PCF produced are efficiently analyzed by a finite element method. The method is very helpful in optimizing the draw parameters and improving the properties of PCF.

关键词： Finite element method

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The dispersion and dispersion slope characteristics of the fiber Gratings fabricated in tapered fiber

The dispersion and dispersion slope characteristics of the f...

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Asia Communications and Photonics Conference and Exhibition, ACP 2009

作者： Li, Bin Wei, Huai Tan, Zhongwei Information Engineering School Communication University of China Beijing 100024 China Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781557528773

A novel method to compensate dispersion and dispersion slope at the same time by using fiber Bragg grating written on the tapered core fiber has been presented. The fiber grating written on this kind of fiber has parameter as 3dB bandwidth 0.861nm. Its dispersion value is -1159ps/nm (within 0.8nm bandwidth), and the dispersion slope is -1.3 ps/nm2. These characteristics of the grating make it can be used in high speed optical fiber communication systems which need the dispersion and dispersion slope be compensated. © 2009 Optical Society of America.

关键词： Fiber Bragg gratings

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Study on properties of long period gratings in Photonic crystal fibers

Study on properties of long period gratings in Photonic crys...

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Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors

作者： Chen, Weiguo Lou, Shuqin Wang, Liwen Li, Honglei Guo, Tieying Jian, Shuisheng 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

The properties of long period gratings in Photonic crystal fibers (PCFLPGs) are systematically analyzed by the improved full-vector effective index model and the coupled mode theory. Dual-resonance peak occurs in PCFLPGs. The dependence of the strength of coupling and the resonance wavelength on the hole pitch, the relative hole size, the grating period, the length of grating, the refractive index modulation depth and the chirp coefficient is studied. Some useful conclusions are obtained, which provide the theoretical basis for the applications of PCFLPGs such as the optical fiber communication, the optical fiber sensing and so on.

关键词： Photonic crystal fibers

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Research on the influence scope of periodic slots on leaky coaxial cables

Research on the influence scope of periodic slots on leaky c...

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2009 International Conference on Microwave Technology and Computational Electromagnetics, ICMTCE 2009

作者： Li, Yujian Wang, Junhong Pu, Shi 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)9781849191401

Calculation of the radiation field is an important work in the novel leaky coaxial cable (LCX) design. By analyzing the influence scope of the slots on the LCX, the minimum length that should be employed in the calculation of LCX can be determined. In this paper, a method of finding the influence scope of slots on LCX is proposed. In this method, the influence scope of slot is studied by analyzing the change of near field distribution when the cable length increases. After the influence scope is gotten, the minimum length of the cable is also obtained. In addition, the radiation field distribution of a single period is also given, which can also be used to determine the influence scope of slots.

关键词： Coaxial cables

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Reverse design of the SMF-PCF F-P cavity

Reverse design of the SMF-PCF F-P cavity

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Photonics and Optoelectronics Meetings, POEM 2009 - Fiber Optic Communication and Sensors

作者： Wang, Liwen Lou, Shuqin Chen, Weiguo Li, Honglei Guo, Tieying 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)9780819479037

In this paper, we report a new F-P cavity based on single mode fiber and multimode PCF. The PCF has been analyzed by the digital image processing and the FEM in order to obtain its effective refractive index and propagation constants. Then optical characteristics of the F-P cavity based on this PCF are numerical analyzed which provide a theoretical basis for the reverse design of the SMF-PCF F-P Cavity. The practice of fabricating SMF-PCF cavity based on this theory has been carried out and the experimental results and theoretical results were consistent. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Single mode fibers

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Design and Fabrication of an Er-Doped Silica Optical Fiber with Six Photosensitive Subcores

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Chinese Physics Letters 2009年第7期26卷 147-149页

作者：李坚王静刘鹏鲁韶华毛向桥江微微宁提纲简水生 Institute of Lightwave Technology Beijing Jiao~ong University Beijing 100044 Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing 3iaotong University Beijing 100044 Signal & Communicaiton Research Institute China Academy of Railway Sciences Beijing 100081 4Department of Physics Xingtai College Xingtai 054001 Department of Physics Xingtai College Xingtai 054001

A type of multi-core Er-doped photosensitive silica optical fiber （MC-EDPF） is proposed and fabricated, in which a high consistency Er-doped core is surrounded by six high consistency Ge-doped cores. The multi-core design can overcome the difficulties encountered in the design and fabrication of single-core EDPFs through a modified chemical vapor deposition method combined with solution doping technology, and there is a conflict between high consistency Er doping and high consistency Ce doping. The absorption of MC-EDPFs achieved 15.876dB/m at 1550mm and lOdB/m at 98Ohm. The refleetivity of the fiber Bragg gratings （FBCs） written directly on the MC-EDPFs is as much as 96.84%.

关键词： Optics quantum optics and lasers Condensed matter: structural mechanical & thermal

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Research on the influence scope of periodic slots on leaky coaxial cables

Research on the influence scope of periodic slots on leaky c...

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2009 International Conference on Microwave Technology and Computational Electromagnetics (ICMTCE 2009)

作者： Yujian Li Junhong Wang Shi Pu Key Laboratory of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing China Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University 100044 China

ISBN: (纸本)9781617382567

关键词： Leaky coaxial cable influence scope near field distribution coaxial cables SLOT TET1 gene field distribution RADIATION FIELD cable

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Analysis and fabrication of broadband add/drop filters using a bragg grating-assisted mismatched coupler

Analysis and fabrication of broadband add/drop filters using...

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2009 Asia Communications and Photonics Conference and Exhibition, ACP 2009

作者： Fan, L.Y. Li, J. Jiang, W.W. Zheng, J.J. Liu, Z.M. Jian, S.S. Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Signal and Communicaiton Research Institute China Academy of Railway Sciences Beijing 100081 China

A Broadband add/drop filter using a linearly chirped Bragg grating-assisted mismatched coupler is fabricated. The maximum reflectivity and 3dB bandwidth of the filter at the drop port are measured to be about 20 dB an... 详细信息

ISBN: (纸本)9781557528773

关键词： Bragg gratings

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The experimental fabrication of add/drop filters using a Bragg grating-assisted mismatched coupler

The experimental fabrication of add/drop filters using a Bra...

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2009 Asia Communications and Photonics Conference and Exhibition, ACP 2009

作者： Fan, L.Y. Jiang, W.W. Li, J. Zheng, J.J. Liu, Z.M. Jian, S.S. Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China Key Lab. of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Signal and Communicaiton Research Institute China Academy of Railway Sciences Beijing 100081 China

An add/drop filter using a Bragg grating-assisted mismatched coupler is fabricated. The maximum reflectivity, 3dB bandwidth, insert loss at the drop port and reflective loss at the input port of the filter are measure... 详细信息

ISBN: (纸本)9781557528773

关键词： Bragg gratings

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Low bend loss in tightly-bent optical fibers through adiabatic bend transitions

Low bend loss in tightly-bent optical fibers through adiabat...

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Conference on Lasers and Electro-Optics, CLEO 2009

作者： Yao, Lei Birks, T.A. Knight, J.C. Centre for Photonics and Photonic Materials and Department of Physics University of Bath Claverton Down Bath BA2 7AY United Kingdom Visisting from Institute of Lightwave Technology Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781557528698

关键词： Bend loss Graded index fibers Light scattering Optical fibers Optical networks Refractive index Fiber optics and optical communications (060.0060) Fiber optics (060.2310) Optical design and fabrication (220.0220) Propagating methods (220.2560)

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