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激光器     
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  laser
    Some Optical Transmission Problems in Optical Fiber Communication and Fiber Grating External Cavity Semiconductor Laser
    光纤通信中的某些光传输问题及光纤光栅外腔半导体激光器
短句来源
    Investigation into the High-speed Pulsed Laser Diode 3D-imaging Ladar
    脉冲半导体激光器高速三维成像激光雷达研究
短句来源
    A TUNABLE CW C~(18)O_2 LASER
    连续波调频C~(18)O_2激光器
短句来源
    The Output Properties of Nd: YAG Laser Q-Switched by LiF: F_2~- Crystal of High Transmittance
    高透过率LiF:F_2~-晶体调Q Nd:YAG激光器的输出特性
短句来源
    Collimation of CO_2 Waveguide Laser Beam
    CO_2波导激光器激光束的准直
短句来源
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  lasers
    Research on Fiber Lasers & Their Applications in WDM Communication System
    光纤激光器及其在WDM通信系统中的应用研究
短句来源
    The APC Experiment of Semiconductor Lasers
    半导体激光器的自动功率控制实验
短句来源
    Analysis and Experiments of Mode Partition Noise of Semiconductor Lasers
    半导体激光器模分配噪声的实验研究
短句来源
    Theory for the Dynamic Quantum AM and FM Noise in Semiconductor Lasers
    半导体激光器动态量子AM和FM噪声的理论
短句来源
    Influences of Nonlinear Semiconductor Lasers on Performances of Microwave Fiber-Optic Transmission Systems
    半导体激光器的非线性对微波光纤传输系统性能的影响
短句来源
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  laser diode
    Investigation into the High-speed Pulsed Laser Diode 3D-imaging Ladar
    脉冲半导体激光器高速三维成像激光雷达研究
短句来源
    Circuit Model Analysis of Practical Semiconductor Laser Diode Module
    实用化半导体激光器组件的电路模型分析
短句来源
    Compression of optical pulses from gain switched DFB laser diode through normal dispersion fiber
    用正常色散光纤进行增益开关 DFB 激光器光脉冲压缩
短句来源
    The article introduces the circuit of optical transmitter module and modulating characteristic of laser diode, and bring forward a design of optical transmitter module based on laser driver MAXIM3263, and expound parameter design of optical transmitter module.
    首先介绍了光发射模块电路组成以及激光器的调制特性,提出基于激光驱动器MAXIM3263的光发射模块设计方法,重点阐述了光发射模块相关参数的设计.
    The Designing and Making for 1.3μm DFB Laser Diode Module and Its Worke Principle
    1.30μmDFB激光器组件的设计和制做及其工作原理
短句来源
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  laser device
    In the emitting part, we described the research on the selection of laser device, the drive circuit of laser diode and emitting antenna;
    其中发射端机主要围绕激光器件的选择、半导体激光器的驱动电路、发射天线等部分进行了详细研究;
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  laser
Two compounds were designed, synthesized, and characterized by 1H-nuclear magnetic resonance (1H-NMR), ultraviolet (UV)-visible, and matrix-assisted laser desorption/ionization (MALDI) mass spectra.
      
Restriction Enzyme Pattern Analysis of Mycobacteria DNA by Capillary Electrophoresis with Laser-Induced Fluorescence Detection
      
A new method for rapidly detecting restriction enzyme patterns of Mycobacterium DNA using capillary electrophoresis with laser-induced fluorescence detection (CE-LIFD) was developed.
      
The polymers were characterized by IR spectra, thermal-weight analysis, scanning electron microscope and laser particle size analysis.
      
Photoinduced intramolecular electron transfer process from C60 moiety to carbazole moiety has been studied by nanosecond laser flash photolysis.
      
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  lasers
In this review article, the development of the double cladding optical fiber for high power fiber lasers is reviewed.
      
The main technology for high power fiber lasers, including laser diode beam shaping, fiber laser pumping techniques, and amplification systems, are discussed in detail.
      
Finally, the applications of fiber lasers in industry are also reviewed.
      
The sources of monochromatic radiation were heliumneon lasers.
      
An experimental study of gasdynamic windows for gas lasers
      
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  laser diode
The main technology for high power fiber lasers, including laser diode beam shaping, fiber laser pumping techniques, and amplification systems, are discussed in detail.
      
Lasing in Cr:ZnSe single crystals is implemented with an efficiency of 31% and an output power of 186 mW using laser diode pumping at a wavelength of 1.77 μm.
      
It is concluded that NYF:Er3+ crystals are promising as active media for tunable lasers with laser diode pumping.
      
Indium arsenide/gallium arsenide structures with vertically coupled quantum dots imbedded in the active zone of a laser diode are investigated by deep-level transient spectroscopy (DLTS), and the capacitance-voltage characteristics are analyzed.
      
A room-temperature injection laser diode with a BeZnSe/ZnSe superlattice waveguide is described.
      
更多          
  laser device
A spin probe method was used to study microviscosity of aqueous medium in embryos and endosperm of maize (Zea mays L.) seeds after their irradiation with a Lvov-1 Elektronika laser device.
      
As the energy source, an excimer laser device was used (CVX-300).
      
Some performances of an excimer discharge at the formative stage are calculated and compared to the experimental results obtained in a XeCl* laser device with a pin cathode without external preionization.
      
Measurements were performed in a laser device of high mechanical stability protected against acoustical noise.
      
Measurements were performed in a laser device of high mechanical stability protected against acoustical noise.
      
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  其他


In the design of optical fibre communication system, the main problem is the determination of the transmitting distance when the parameters of the fibre, laser and detector are known, and the requirements for bit rate and error rats of the system are given. S. D. Personick's method, is known to be maore satisfactory than the others' for this purpose, in which a group of formulae and curves are available, In this paper we have converted the Personick's standard of r. m. s. pulse width into the full width at half...

In the design of optical fibre communication system, the main problem is the determination of the transmitting distance when the parameters of the fibre, laser and detector are known, and the requirements for bit rate and error rats of the system are given. S. D. Personick's method, is known to be maore satisfactory than the others' for this purpose, in which a group of formulae and curves are available, In this paper we have converted the Personick's standard of r. m. s. pulse width into the full width at half maximum of Gaussian pulse, which may be used in consideration of the restriction of the band width of the fibres imposed on the transmitting distance, in order to facilitate engineering calculation. In regard to the calculations of the reciever sensitivity, Personick gave only specific formulae for FET reciever, In this paper the formulae for bipolar transistor reciever are complemented and thus extend the field of application of Personick's method. The Goell's method joined with the Personick's "penalty" curves may offer a simple method for estimation of reciever sensitivity. Finally, several numerical examples including the case of 5.7 km trial line have been evaluated for comparison.

已知光纤、激光器、探测器的参数和系统传输码率与误码率的要求,如何确定系统可能达到的通信距离,是光纤通信系统总体设计的主要问题。如所熟知,数字光纤通信系统的设计以S.D.Personick方法较完善,已有一套公式和曲线可供使用。本文把Personick的均方根脉宽标准转化为高斯脉冲的半宽,用来考虑光纤带宽对通信距离的限制,以便作工程计算。对于接收机灵敏度的计算,Personick只给出场效应管接收机的具体公式。本文补充了双极性晶体管接收机的计算公式,使Personick方法的应用范围更广。把Personick的“代价”曲线和Goell方法结合起来,可作为一种接收机灵敏度估算的简便方法。最后,列举几个例子作比较,包括5.7公里实验线路的估算。

In this article, The principle, construction, opto-electrical configuration and characteristics of the infrared TV line scanner are presented. The TV line scanner has been applied to the near-field observation, profiles of the infrared LED'S and Laser's, and to the investigation of dark line defects and far-field observations of LED's. It has been proved to be useful for the determination of the line width of the photolithographic masks and for the transmmission inspection of silicon wafers.

本文介绍了研制的电视选行扫描器的原理、结构、观察系统装置的特点和性能。此扫描器已应用于发光管及激光器的近场形貌、近场分布、发光管的暗线研究以及远场观察,光刻线条的测量,硅片透射研究等方面的工作。

Because of the fluctuation of the pump energy, generally speaking, the output power of a Q-switch laser (for example Nd~(+3):YAG laser) is not stable. If the Q-switch is not triggerred at certain time after the pumping, but is triggerred when the superadiant signal intensities have risen to a certain value,then we can get stable laser output power. The design of this "constant-gain" Q switch device is discribed. The stability of laser output power and the pulse width of laser are measured. The resulting stability...

Because of the fluctuation of the pump energy, generally speaking, the output power of a Q-switch laser (for example Nd~(+3):YAG laser) is not stable. If the Q-switch is not triggerred at certain time after the pumping, but is triggerred when the superadiant signal intensities have risen to a certain value,then we can get stable laser output power. The design of this "constant-gain" Q switch device is discribed. The stability of laser output power and the pulse width of laser are measured. The resulting stability of this device are three times better than an ordinary Q-switch device.

通常的定时调Q固体激光器(例Nd~(+3):YAG),由于泵浦能量的起伏而影响了激光器输出能量的稳定性,如果不是在泵浦后的固定时刻打开Q开关,而是在超辐射强度达到某一固定值时打开,便可得到稳定的输出。本文描述了这种恒定增益Q开关的设计;测量了输出脉冲激光能量的稳定性以及输出脉冲宽度,并与定时Q开关性能做了比较,结果其输出激光脉冲能量的稳定性提高了三倍。

 
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