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High Power One- and Two-Order Cascaded raman lasers Based on Home-Made Phosphosilicate Fibre

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Chinese Physics Letters 2005年第5期22卷 1137-1139页

作者：冯鸣李乙钢李家方李静张小光吕可诚王宏杰 InstituteofPhysics NankaiUniversityTianjin300071

One- and two-order cascaded raman fibre lasers are demonstrated by usinghome-made P-doped raman fibres. An output power of 2.8 W at 1245nm with a slope efficiency of 33.4%and an output power of 2.0 W at 1495nm with a ... 详细信息

关键词： Fiber Slope Efficiency Output power raman raman lasers pump source

Quantum sensing of control errors in three-level systems by coherent control techniques

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维普期刊数据库

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Science China(Physics,Mechanics & Astronomy) 2023年第4期66卷 37-48页

作者： Hang Xu Xue-Ke Song Dong Wang Liu Ye School of Physics and Optoelectronics Engineering Anhui UniversityHefei 230601China

The quantum coherent control of a quantum system with high fidelity is rather important in quantum computation and quantum information *** control techniques are used to reach these targets,such as resonant excitation,adiabatic passages,shortcuts to adiabaticity,and composite ***,for a single pulse to realize population transfer,a tiny external error has a slight influence on the final *** repeated application of the same pulse will greatly amplify the error efect,making it easy to be ***,we propose to measure small control errors in three-level quantum systems through a coherent amplification of their efects using several coherent control *** the two types of Hamiltonian with an SU(2)dynamic symmetry,we analyze how the fidelity of the population transfer is afected by the Rabi frequency error and static detuning deviation based on the pulse sequence with alternating and same phases,*** results show that the sensitivity of detecting these errors can be efectively amplified by control pulse ***,we discuss the efficiency of sensing the two errors with the control techniques by comparing the full width at half maximum of the population *** results provide an accurate and reliable way for detecting the weak error in three-level quantum systems by repeatedly applying the coherent control pulse.

关键词： atom lasers sensor multiphoton processes raman lasers

Backward raman amplification in plasmas with chirped wideband pump and seed pulses

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Chinese Physics B 2015年第1期24卷 298-302页

作者：吴朝辉魏晓峰左言磊刘兰琴张智猛李敏周煜梁粟敬钦 Department of Electric-optics Nanjing University of Science and Technology Research Center of Laser Fusion China Academy of Engineering Physics Science and Technology on Plasma Physics Laboratory

Chirped wideband pump and seed pulses are usually considered for backward raman amplification（BRA） in plasmas to achieve an extremely high-power laser pulse. However, current theoretical models only contain either a chirped pump or a chirped seed. In this paper, modified three-wave coupling equations are proposed for the BRA in the plasmas with both chirped wideband pump and seed. The simulation results can more precisely describe the experiments, such as the Princeton University experiment. The optimized chirp and bandwidth are determined based on the simulation to enhance the output intensity and efficiency.

关键词： ultrashort pulse generation raman lasers laser–plasma interactions plasma simulation

Eye-safe intra-cavity diamond cascaded raman laser with high peak-power and narrow linewidth

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Chinese Optics Letters 2024年第4期22卷 60-65页

作者：米晓波林超男胡永生马后杰何九如马凤英樊莉单崇新 School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China College of Physics Science and Technology Institute of Applied Photonic TechnologyYangzhou UniversityYangzhou 225002China

The 1.4–1.8μm eye-safe lasers have been widely used in the fields of laser medicine and laser detection and *** diamond raman lasers are capable of delivering excellent characteristics,such as good beam quality concomitantly with high output *** intra-cavity diamond raman lasers have the advantages of compactness and low raman thresholds compared to the external-cavity raman ***,to date,the intra-cavity diamond cascaded raman lasers in the spectral region of the eye-safe laser have an output power of only a few hundred milliwatts.A 1485 nm Nd:YVO_4/diamond intra-cavity cascaded raman laser is reported in this *** mode matching and stability of the cavity were optimally designed by a V-shaped folded cavity,which yielded an average output power of up to 2.2 W at a pulse repetition frequency of 50 kHz with a diode to second-Stokes conversion efficiency of 8.1%.Meanwhile,the pulse width of the second-Stokes laser was drastically reduced from 60 ns of the fundamental laser to 1.1 ns,which resulted in a high peak power of 40 *** device also exhibited single longitudinal mode with a narrow spectral width of<0.02 nm.

关键词： diamond intra-cavity raman lasers eye-safe lasers high peak-power

SPECTRAL CHARACTERISTICS OF raman EMISSIONS FROM MINIATURE OPTICALLY PUMPED FAR INFRARED LASER

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SPECTRAL CHARACTERISTICS OF RAMAN EMISSIONS FROM MINIATURE O...