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Switchable Multi-Wavelength Erbium-Doped Fiber Lasers Based on a Mach-Zehnder Interferometer Using a Twin-Core Fiber

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中国物理快报（英文版） 2009年第6期26卷 137-140页

作者： FENG Su-Chun XU Ou LU Shao-Hua JIAN Shui-Sheng Institute of Lightwave Technology Key Lab of All Optical Network and Advanced Telecommunication Network of EMCBeifing Jiaotong UniversityBeijing 100044

A switchable multi-wavelength erbium-doped fiber ring laser based on a compact in-fiber Mach-Zehnder interferometer comb filter at room temperature is *** comb filter is formed by splicing a section of twin-core fiber between two single mode *** adjusting the states of the polarization controller appropriately,the laser can be made to operate in stable single-,dual- and three-wavelength lazing *** operation principle is based on spectral hole burning induced by the saturated effect and polarization hole burning.

关键词： No English keywords

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Analysis and Simulation of Adiabatic Bend Transitions in Optical Fibers

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Chinese Physics Letters 2009年第7期26卷 160-163页

作者：姚磊娄淑琴简水生 Institute of Lightwave Technology Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044

A low-loss criterion for bend transitions in optical fibers is proposed. An optical fiber can be tightly bent with low loss to be adiabatic for the fundamental mode, provided that an approximate upper bound on the rate of change of bend curvature for a given bend curvature is satistied. Two typical adiabatic bend transition paths, the optimum profile and linear protile, are analyzed and studied numerically. A realizable adiabatic transition with an Archimedean spiral profile is introduced for low bend loss in tightly bent optical fibers. Design of the transitions is based on modeling of the propagation and coupling characteristics of the core and cladding modes, which clearly illustrate the physical processes involved.

关键词： sea surface nonliear interaction numerical method

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The Second Order Guided Modes Based on Photonic Bandgap Effects in Air/Glass Photonic Crystal Fibers

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Chinese Physics Letters 2009年第12期26卷 146-148页

作者：姚磊娄淑琴简水生 Institute of Lightwave Technology Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044

We introduce a defect site in the periodic structure of a photonic bandgap fiber, to confine and guide the second order mode by photonic bandgap effects. Based on a high air-filling fraction photonic crystal cladding structure, a simplified model with an equivalent air cladding was proposed to explore and analyze the properties of this second order guided mode.

关键词： Optics quantum optics and lasers

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Photonic crystal fiber with novel dispersion properties

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Frontiers of Optoelectronics 2009年第2期2卷 170-177页

作者： Shuqin LOU Shujie LOU Tieying GUO Liwen WANG Weiguo CHEN Honglei LI Shuisheng JIAN Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Shandong Weifang Huaguang Precision Machinery Co.

Our recent research on designing microstructured fiber with novel dispersion properties is reported in this paper. Two kinds of photonic crystal fibers（PCFs） are introduced first. One is the highly nonlinear PCF with broadband nearly zero flatten dispersion. With introducing the germanium-doped（Ge-doped） core into highly nonlinear PCF and optimizing the diameters of the first two inner rings of air holes, a new structure of highly nonlinear PCF was designed with the nonlinear coefficient up to 47 W–1·km–1at the wavelength 1.55 μm and nearly zero flattened dispersion of ±0.5 ps/（km·nm） in telecommunication window（1460–1625 nm）. Another is the highly negative PCF with a ring of fluorin-doped（Fdoped） rods to form its outer ring core while pure silica rods to form its inner core. The peak dispersion – 1064ps/（km·nm） in 8 nm full width at half maximum（FWHM）wavelength range and – 365 ps/（km·nm） in 20 nm（FWHM） wavelength range can be reached by adjusting the structure parameters. Then, our recent research on the fabrication of PCFs is reported. Effects of draw parameters such as drawing temperature, feed speed, and furnace temperature on the geometry of the final photonic crystal fiber are investigated.

关键词： photonic crystal fiber (PCF) nearly zero flatten dispersion high nonlinear high negative dispersion fabrication technique

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Design and fabrication of erbium doped photosensitive fibers

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Science China(Technological Sciences) 2009年第5期52卷 1234-1241页

作者： LI Jian LIU Peng LU ShaoHua WANG Jing MAO XiangQiao WEI Huai FU YongJun ZHENG Kai NING TiGang LI TangJun JIAN ShuiSheng Institute of Lightwave Technology Beijing Jiaotong UniversityBeijing 100044China Key Lab of All Optical Network&Advanced Telecommunication Network of EMC Beijing Jiaotong UniversityBeijing 100044China Physics Department of XingTai College Xingtai 054001China

A kind of erbium doped photosensitive fiber(EDPF) was proposed and fabricated,whose core was made of double layers named photosensitive layer and erbium doped *** double-layer core de-sign can overcome difficulties in fabrication of EDPF with single core design,*** conflict between the high consistency rare earth doping and high consistency germanium doping.A sample was fabri-cated through the modified chemical vapor deposition method combined with solution doping *** peak absorption coefficient was 48.80 dB/m at 1.53 μm,the background loss was lower than 0.1 dB/m,and the reflectivity of the fiber Brag gratings(FBG) written directly on the sample fiber was up to 97.3% by UV-writing ***,a C band tunable fiber laser was fabricated using the sample fiber,in which a uniform FBG was written directly on EDPFs as a reflector.A single wavelength lasing with a maximum wavelength tuning range of 1555.2―1558.0 nm was achieved *** this tuning range,the full-width at half maximum(FWHM) of the laser output was smaller than 0.015 nm and the side mode suppression ratio(SMSR) was better than 50 dB.

关键词： erbium doped fiber(EDF) photosensitivity modified chemical vapor deposition(MCVD) method solution doping technique fiber Bragg grating(FBG) fiber laser wavelength tunable

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Single-longitudinal-mode erbium-doped fiber laser with multiplelinear cavity

Single-longitudinal-mode erbium-doped fiber laser with multi...

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Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration

作者： Suchun, Feng Ou, Xu Shaohua, Lu Wenhua, Ren Shuisheng, Jian 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)9780819475381

An improved stable single-longitudinal-mode (SLM) erbium-doped fiber (EDF) laser with multiple-linear short cavity is demonstrated. Three fiber Bragg gratings (FBGs) with the same parameters directly written in a homemade photosensitive EDF (PEDF) in a single step are used as the wavelength-selective and mode-selective component in a 14 cm long linear laser cavity. The optical signal-to-noise ratio (OSNR) is over 50 dB. The amplitude variation in nearly one hour is less than 0.3 dB. The proposed laser has the advantages such as simple fabrication and compact all-optical fiber configuration. © 2009 SPIE.

关键词： Photosensitivity

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Switchable dual-wavelength fiber laser based on PCF Sagnac loop and broadband FBG

Switchable dual-wavelength fiber laser based on PCF Sagnac l...

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Passive Components and Fiber-based Devices VI

作者： Chen, Weiguo Lou, Shuqin Feng, Suchun Wang, Liwen Li, Honglei Guo, Tieying Jian, Shuisheng Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9780819480323

Switchable dual-wavelength fiber laser with photonic crystal fiber (PCF) Sagnac loop and broadband fiber Bragg grating (BFBG) at room temperature is demonstrated. By adjusting the polarization controller (PC) appropriately, the laser can be switched between the stable single- and dual-wavelength lasing operations by exploiting polarization hole burning (PHB) and spectral hole burning effects (SHB). © 2009 SPIE-OSA-IEEE.

关键词： Fiber Bragg gratings

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Switchable dual-wavelength fiber laser based on PCF Sagnac loop and broadband FBG

Switchable dual-wavelength fiber laser based on PCF Sagnac l...

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2009 Asia Communications and Photonics Conference and Exhibition, ACP 2009

作者： Chen, Weiguo Lou, Shuqin Wang, Liwen Li, Honglei Guo, Tieying Jian, Shuisheng 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)9781557528773

Switchable dual-wavelength fiber laser with photonic crystal fiber (PCF) Sagnac loop and broadband fiber Bragg grating (FBG) at room temperature is demonstrated. By adjusting the polarization controller appropriately, the laser can be switched between stable single- and dual-wavelength lasing operations by exploiting polarization hole burning and spectral hole burning effects . ©2009 Optical Society of America.

关键词： Fiber Bragg gratings

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High temperature sensing characteristics of erbium-doped fiber using fluorescence intensity ratio technology

High temperature sensing characteristics of erbium-doped fib...

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Passive Components and Fiber-based Devices VI

作者： Peng, Jian Liu, Lisong Fu, Yongjun Wei, Huai Wang, Jing Jian, Shuisheng Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9780819480323

The fluorescence intensity ratio (FIR) technique for optical fiber-based temperature sensing is discussed in many previous papers. But in the high temperature sensing the FIR technique has been researched a little. In this paper, the temperature dependence of fluorescence in erbium-doped fiber between ∼700 and ∼1300 °C is discussed and experimentally demonstrated. 1450nm and 1530nm wavelengths are chosen to calculate the FIR, and the temperature coefficient could achieve ∼ 0.003dB/°C. © 2009 SPIE-OSA-IEEE.

关键词： Fluorescence

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Compact in-fiber mach-zehnder interferometer using a twin-core fiber

Compact in-fiber mach-zehnder interferometer using a twin-co...

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Asia Communications and Photonics Conference and Exhibition, ACP 2009

作者： Feng, Suchun Li, Honglei Xu, Ou Lu, Shaohua Jian, Shuisheng 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)9781557528773

A compact in-fiber Mach-Zehnder interferometer is demonstrated by splicing a section of twin-core fiber (TCF) between two single mode fibers (SMFs). Redshift is observed with a sensitivity of about 0.037 nm/°C for increased temperature, whereas blueshift is observed with a sensitivity of about 0.866 pm/μΕ for applied strain changes. © 2009 Optical Society of America.

关键词： Single mode fibers

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