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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Lingling Chen Meng Zhang Yue Cai Chun Zhou Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

A new InGaAs/InAlAs multi-layer design of broadband SESAM including precise phase shift compensation is proposed. Simulation demonstrates a uniform modulation depth up to 25% for the wavelength from 1000 to 1080 nm.

ISBN: (纸本)9781424438303

关键词： Phase modulation Indium gallium arsenide Indium compounds Reflectivity Absorption Laser mode locking Fiber lasers Laser theory Semiconductor lasers Solid lasers

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Ultra-low repetition rate SESAM-mode-locked linear-cavity erbium-doped fiber laser

Ultra-low repetition rate SESAM-mode-locked linear-cavity er...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Lingling Chen Meng Zhang Chun Zhou Yue Cai Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

We investigated linear-cavity with ultra-low repetition rate Erbium-doped fiber laser mode-locked by a high modulation depth SESAM. Output pulses were highly-chirped, at energy up to 14 nJ and minimum repetition rate ... 详细信息

ISBN: (纸本)9781424438303

关键词： Erbium-doped fiber lasers Laser mode locking Optical fiber polarization Optical pulses Optical fiber communication Laser stability Fiber lasers Laser theory Pulse amplifiers Ring lasers

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Sub-100khz repetition rate mode-locked dispersion managed erbium-doped fiber laser

Sub-100khz repetition rate mode-locked dispersion managed er...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Lingling Chen Meng Zhang Ling Ren Peng Li Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

A 91.4 kHz repetition rate Er-doped dispersion managed mode-locked fiber laser was demonstrated. The pulse energy was amplified to 790 nJ though single stage amplifier.

ISBN: (纸本)9781424438303

A 91.4 kHz repetition rate Er-doped dispersion managed mode-locked fiber laser was demonstrated. The pulse energy was amplified to 790 nJ though single stage amplifier.

关键词： Erbium-doped fiber lasers Laser mode locking Optical fiber polarization Pulse amplifiers Optical fiber communication Laser theory Optical pulses Space vector pulse width modulation Fiber lasers Wavelength division multiplexing

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381 KHz repetition-rate operation of an ytterbium-doped fiber laser

381 KHz repetition-rate operation of an ytterbium-doped fibe...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Chun Zhou Lingling Chen Yue Cai Meng Zhang Ling Ren Peng Li Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

381 kHz repetition-rate operation of an Yb-doped fiber laser oscillator and amplifier was demonstrated. The single pulse energy was 734 nJ after the single stage amplification.

ISBN: (纸本)9781424438303

381 kHz repetition-rate operation of an Yb-doped fiber laser oscillator and amplifier was demonstrated. The single pulse energy was 734 nJ after the single stage amplification.

关键词： Fiber lasers Optical fiber polarization Laser mode locking Optical fiber communication Pulse amplifiers Space vector pulse width modulation Chemical lasers Optical pulses Laser theory Oscillators

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Simplified cavity for erbium-doped fiber laser mode locked with spectral filtering

Simplified cavity for erbium-doped fiber laser mode locked w...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Lingling Chen Meng Zhang Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.

ISBN: (纸本)9781424438303

We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.

关键词： Laser mode locking Erbium-doped fiber lasers Optical fiber polarization Filters Laser theory Birefringence Optical fiber communication Wavelength division multiplexing Filtering Optical pulses

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Advances in SESAM and carbon nanotube saturable absorber mode locked fiber lasers

Advances in SESAM and carbon nanotube saturable absorber mod...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Zhigang Zhang Meng Zhang Lingling Chen Yiyang Jiao Zhao Tu Ling Ren Yue Cai Chun Zhou Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

The paper summarizes recent advances in Er and Yb doped mode locked fiber lasers with saturable absorbers such as semiconductor and carbon nanotube saturable absorbers.

ISBN: (纸本)9781424438303

The paper summarizes recent advances in Er and Yb doped mode locked fiber lasers with saturable absorbers such as semiconductor and carbon nanotube saturable absorbers.

关键词： Laser mode locking Carbon nanotubes Fiber lasers Optical fiber polarization Laser theory Absorption Optical fiber devices Semiconductor lasers Mirrors Optical fiber communication

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Timing jitter reduction over 40-km fiber link using harmonic frequency phase locking of femtosecond comb

Timing jitter reduction over 40-km fiber link using harmonic...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Fan Zhang Haipeng Guo Dong Hou Jianye Zhao Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China Circuits and System Laboratory School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

We demonstrate a timing jitter compensation system by regulating the 10 th harmonic phase difference of mode locked laser pulses for long distance timing distribution. So far we have obtained 48-ps timing jitter of a... 详细信息

ISBN: (纸本)9781424438303

关键词： Timing jitter Frequency Laser mode locking Ultrafast optics Optical pulses Optical filters Power harmonic filters Fiber lasers High speed optical techniques Ultrafast electronics

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Study on a novel 6-DOF combinational parallel manipulator

Study on a novel 6-DOF combinational parallel manipulator

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IEEE International Conference on robotics and Biomimetics

作者： Wei Zhao Bing Li Hongjian Yu Ying Hu State Key Laboratory of Robotics and System Harbin Institute of Technology Shenzhen China Harbin Institute of Technology Harbin Heilongjiang CN Cognitive Technologies Laboratory Shenzhen Institute of Advanced Technology Chinese Academy and Sciences Shenzhen China

A novel 6-DOF parallel manipulator composed of two limited-DOF manipulators is proposed in this paper, the degree of freedom (DOF) of this manipulator is analyzed and the position kinematic modeling is established. The Jacobian matrix is derived by vector loops equations. The workspace is determined considering the interference check by the numerical method. Furthermore, the performance of the mechanism is evaluated according to dexterity criteria. In order to satisfy the different configuration requirements, the two reconfigurable structures are presented based on the presented 6-DOF parallel mechanism. The work provides basis for the development of the novel robotic manipulator.

关键词： Manipulators Fasteners Kinematics Parallel robots Fixtures Jacobian matrices Biomimetics Equations Interference Cognitive robotics

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Femtosecond laser pulse generation in an erbium-doped ring cavity fiber laser with a single-wall carbon-nanotube saturable absorber

Femtosecond laser pulse generation in an erbium-doped ring c...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Ling Ren Peng Li Kaili Jiang Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing China

We demonstrate a new saturable absorber mirror coated with thin-film single-wall carbon nanotubes. Using such a device, we build a T-type ring cavity fiber laser and obtained pulses of 586 fs.

ISBN: (纸本)9781424438303

We demonstrate a new saturable absorber mirror coated with thin-film single-wall carbon nanotubes. Using such a device, we build a T-type ring cavity fiber laser and obtained pulses of 586 fs.

关键词： Erbium-doped fiber lasers Ring lasers Pulse generation Carbon nanotubes Laser mode locking Optical fiber polarization Optical retarders Mirrors Silver Collimators

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Efficient method for dynamic problems and its application to the transient response analysis for functionally graded material plates

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Guti Lixue Xuebao/Acta Mechanica Solida Sinica 2009年第2期30卷 182-188页

作者： Huang, Yonghui Han, Xu Ran, Chengxin State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Automotive Engineering Hunan University Changsha 410082 China College of Information System and Management National University of Defence Technology Changsha 410073 China

In this paper, a hybrid method is developed to real-timely solve dynamic problems governed by second partial differential equation (PDE). The present method involves the combination of reduced-basis method (RBM) and implicit Newmark's method. In this method, it needs a training space, which contains the solutions corresponding to some carefully selected sample parameters and all time steps. A greedy algorithm is adopted to adaptively select basis vectors from the training space for constructing reduced basis space. It results in a reduced system by the standard Galerkin projection the matrices and loading vector. The solutions in arbitrary new parameters are approximately regenerated by solving the reduced Newmark's formulas. To further enhance the efficiency, an off-line/on-line decomposition is suggested for the computational implementation of the method. The present method is applied to analysis the transient response in an actual functionally graded material (FGM) plate. In comparison, the computational cost of transient displacement analysis in FGM plate is reduced significantly. The numerical example demonstrates the efficiency and accuracy of our algorithm.

关键词： Transient analysis

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