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A New Neodymium∶Phosphate-glass single Transverse mode fiber Laser with Double Clad Geometry

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Chinese Journal of Lasers 1998年第6期 86-89页

作者： FENG Xian QI Changhong JI Huixing LIN Fengying HU Hefang (Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Scienices, Shanghai 201800, China)

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关键词： single mode fiber Nd 3+ doped LD pumped

Strain and Temperature Discrimination Based on a Mach-Zehnder Interferometer With Cascaded single mode fibers

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Photonic Sensors 2023年第1期13卷 40-48页

作者： Shiying XIAO Beilei WU Chunran SUN Zixiao WANG Youchao JIANG Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave TechnologyBeijing Jiaotong UniversityBeijing 100044China System Integration Department China North Industries Corp.Beijing 100053China

An in-fiber Mach-Zehnder interferometer is proposed for the discrimination of strain and *** sensor is based on two cascaded standard single mode fibers using three peanut tapers fabricated by simple *** cascaded structure excites more frequency components,which induce four sets of interference dips in the transmission *** set of the spectrum dips have different sensitivities to temperature and strain from those of the other *** sensor can discriminate strain and temperature by monitoring the wavelength shifts of two spectrum *** experiments are taken both for strain and temperature increasing and decreasing *** results show that Dip 1 has an average strain sensitivity of-0.911 pm/με and an average temperature sensitivity of 49.98pm/℃.The strain sensitivity for Dip 2 is negligible and its average temperature sensitivity is 60.52pm/℃.The strain and temperature resolutions are±3.82με and±0.33℃.

关键词： Mach-Zehnder interferometer peanut taper simultaneous measurement single mode fiber strain sensor temperature sensor

Mach-Zehnder interferometer based on core-cladding mode coupling in single mode fibers

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Frontiers of Optoelectronics 2010年第4期3卷 364-369页

作者： Yan LIU Bo LIU Hao ZHANG Yinping MIAO Key Laboratory of Opto-Electronic Information and Technology Ministry of EducationInstitute of Modern Optics Nankai University Tianjin Key Laboratory of Film Electronic and Communication Devices School of Electronics Information EngineeringTianjin University of Technology

In this paper, a novel simple but effective method is presented to construct compact all-fiber MachZehnder（M-Z） interferometer based on CO2-lasermachined micro-notches in single mode fibers. Interference fringes are obtained, and temperature, force, and bending characteristics of the interferometer have been experimentally investigated. Such a compact fiber component with acceptable sensing performances makes it a good candidate for the measurement of numerous physical parameters.

关键词： Mach-Zehnder (M-Z) interferometer micronotch optical fiber sensor single mode fiber

Analysis of Radio over fiber system for mitigating four-wave mixing effect

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Digital Communications and Networks 2020年第1期6卷 115-122页

作者： Namita Kathpal Amit Kumar Garg Department of Electronics&Communication Engineering Deenbandhu Chhotu Ram University of Science and TechnologyMurthalSonepatHaryanaIndia

In this paper,an efficient 8-channel 32Gbps RoF(Radio over fiber)system incorporating Bessel Filter(8/32 RoFBF)has been demonstrated to reduce the impact of non-linear transmission effects,specifically Four-Wave Mixing(FWM).The simulation results indicate that the proposed 8/32 RoF-BF system provides an optimum result *** spacing(75 GHz),input source power(0 dBm)and number of input channels(8).In comparison with the existing RoF system,the proposed 8/32 RoF-BF system has been validated analytically and it is found that the performance of the proposed system is in close proximity particularly in FWM sideband power reduction of the order of 4 dBm for the 8-channel 32Gbps RoF system.

关键词： Dispersion compensating fiber Four-wave mixing Radio over fiber single mode fiber Wavelength division multiplexer

Chromatic Dispersion Monitoring Method Based on Phase Shift Technique

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Transactions of Tianjin University 2007年第1期13卷 67-69页

作者：吕辰刚武星曾丽珠秦一帆祖鹏胡志雄葛春风 School of Precision Instrument and Optoelectronics Engineering Tianjin University

The modulation phase shift method was used to measure chromatic dispersion in a standard single mode fiber for telecommunication. The modulation phase difference of the transmitted light at the wavelength of 1532.16 nm modulated by a radio frequency signal was measured, relative to the transmitted light at the wavelength of 1549.33 nm modulated by the same signal. By introducing a reference light at the wavelength of 1310 nm, a 1310/1550 nm wavelength division multiplexing was used instead of the high cost dense wavelength division multiplexing. In the experiment, two testing lights were coupled with the reference light to the fiber spools of different lengths, respectively. By finite difference method, the chromatic dispersion between the two testing lights was measured, and the fixed errors generated during transmission were less than 0.5 ps/(nm·km).

关键词： single mode fiber optical dispersion wavelength division multiplexing phase shift

Experimental Study on Time-Spread/Wavelength-Hop Optical Code Division Multiplexing with Dispersion-Compensating En/Decoder

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光学学报 2003年第S1期23卷 725-726页

作者： Hideaki Tamai Hideyuki Iwamura Naoki Minato Saeko Oshiba Oki Electric Industry Co. Ltd. 550-5 Higashiasakawa-cho Hachioji-shi Tokyo 193-8550 Japan Optoelectronic Industry and Technology Development Association 1-20-10 Sekiguchi Bunkyo-ku Tokyo 112-0041Japan

10Gbit/s time-spread/wavelength-hop optical code generation and decoding are performed by dispersion-compensating fiber Bragg grating (FBG) en/decoder pair. Error-free 10km single mode fiber (SMF) transmission of 10Gb... 详细信息

关键词： fiber Bragg grating single mode fiber code generation

Photonic Crystal fiber Attenuator

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光学学报 2003年第S1期23卷 -页

作者： Joo Beom Eom Hokyung Kim Jinchae Kim Un-Chul Paek Byeong Ha Lee Department of Information and Communications Kwangju Institute of Science and Technology 1 Oryong-dong

We propose a novel fiber attenuator based on photonic crystal fibers. The difference in the modal field diameters of a conventional single mode fiber and a photonic crystal fiber was used. A variable optical attenuato... 详细信息

关键词： photonic crystal fiber variable optical attenuator single mode fiber

DISPERSION COMPENSATION CFBG IN 100km 10Gbit/s RECIRCULATING SYSTEMS

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Journal of Electronics(China) 2003年第6期20卷 461-466页

作者： Yang Aiying Wang Ziyu Zhang Zhaoyi Chen Zhangyuan Wu Deming(National Lab on Local Optic-fiber Communication Networks & Advance Optical CommunicationSystems, Department of Electronics, Peking University, Beijing 100871) National Lab on Local Optic-fiber Communication Networks & Advance Optical Communication Systems Department of Electronics Peking University Beijing 100871

A 10 Gbit/s recirculating system is configured with Chirped fiber Bragg Grating (CFBG) for the dispersion compensation. For the first time, the transmission distance in the loop reaches 1000km with bit error rate of 10-9. The effect of the group delay ripple of the fiber grating is also investigated in the recirculating systems, and it is shown that the transmission distance is limited to 4 cycles (4× 167.1km ) in the loop with the power penalty fluctuation below 1.0dB. Thus the group delay ripple should be reduced to allow for the wavelength drift of ±*** the end of this letter, the principles are given for designing long haul recirculating systems with dispersion compensation CFBG.

关键词： Chirped fiber Bragg grating single mode fiber Dispersion compensation Bit error rate

Power Analysis and Experimental Study of the fiber Null Coupler with an Acousto-optic Device

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Chinese Journal of Lasers 2002年第3期 19-23页

作者： WU Lei ZHENG Yuan QI Jiang PU Hongtu CHEN Shuqiang (School of Telecommunication Engineering, Beijing University of Post and Telecommunications, Beijing 100876, China)

A single mode fiber acousto optic (AO) switch based on a null coupler at wavelength of 1 55 μm is reported. According to the coupled mode theory, power distribution of the null coupler with the acoustic wave is formulated for general case. Excess loss of 0.1 dB and the schematic graph of throughput and coupled power are obtained experimentally.

关键词： null coupler acousto optic effect single mode fiber