threshold gain

The laser feedback interference in λ/ 4 phase-shifted index-coupled and gain-coupled Distribute Feedback laser diodes is analyzed. The threshold gain and oscillation frequency variation in DFB laser diode are theoretically deduced, and present the expression of complex feedback sensitivity.

分析了λ/4相移折射率耦合型及增益耦合型分布反馈激光器的自混合干涉效应，推导出分布反馈激光器的增益及频率的变化，并给出复反馈灵敏度系数表达式。

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The Influence of the Shell on the Modal Threshold Gain of Cylindrical and Oxide-Confined VCSEL

外包壳对具有氧化孔径层的圆柱形VCSEL阈值增益的影响

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The Saturation Power and Threshold Gain of Semiconductor Laser Amplifiers

半导体激光放大器的饱和功率和阈值增益

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We calculated longitudinal confinement factor, threshold gain, optical gain and output power etc through theoretical model.

根据理论模型计算了纵模限制因子、阈值增益、光增益、输出功率等特征参数。

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The analysis of one particular structure has shown that a relatively low threshold current density of 832 A/ cm~ 2 can provide a threshold optical gain of 50/ cm at room temperature.

理论分析显示，用一个相对较低的阈值电流密度（832A/cm2）就能在室温下产生50/cm的阈值光学增益。

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The least triggering electric threshold of high gain switch is 4.1kV/cm.

测量了高倍增开关的光电阈值曲线，其最小触发电场阈值≥4.1kV/cm。

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The copies migrate among the nodes based on access localization and threshold value, to gain the balance between efficiency enhanced by multi-copies and depression by consistent maintenance.

副本根据被访问的时空局部性和阈值在节点之间迁移，以达到在多副本改善效率和一致性维护增加开销之间的折中。

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The general expression of the threshold gain and frequency in the DFB lasers was deduced by using the coupled wave function.

利用耦合波方程，推导出分布反馈激光器自混合干涉频率及增益变化的表达式。

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The effects of external cavity feedback on the threshold gain and emission linewidth are discussed theoretically;

理论上分析了外腔的引入对激光器的阈值增益和光谱线宽的影响；

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Based on the conditions of the search area, the threshold& RX Gain can be decreased or increased.

阈值和Rx增益可根据搜索区域的情况而减小或增加。

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The threshold gains of different longitudinal modes are modulated by optical feedback. The mode which has the lowest threshold gain can oscillate. GAINS AND REGRETS

光回馈调制了激光器不同纵模的阈值增益，阈值增益最低的纵模获得振荡.参展商心声：收获与遗憾并存&记2006中国（上海）国际跨国采购大会

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The numerical simulations in the case of cylinder structure show oscillating wavelength and threshold gain against inside and outside radius of laser, the layer refractive index and pair number of Bragg mirror, thickness, position and oxidized material's refractive index of oxidized aperture, in detail.

对圆柱形结构情况进行了数值模拟，得到了振荡波长、阈值增益随激光器内外半径、Bragg反射镜层折射率、周期数以及氧化孔径层厚度、位置和氧化物折射率的详细变化规律；

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This reveals that the corporations with low-level human capital exceeding the human capital threshold will gain the improvement of technical efficiency by proper human capital investment.

这就表明，处于低人力资本水平的公司通过适当的人力资本投入跨过人力资本水平的门限即可以获得更大的技术效率提升。

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For the first time, the Raman threshold and gain coefficient are measured for high order Stokes components of multi-crystals.

首次研究了多种拉曼晶体高级Stokes光的阈值和增益。

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The analytical results show the threshold condition of low gain excimer laser is fundamentally different from the cw laser in short gain pulse, and depends on time integrated gain coefficient that has to exceed a critical value.

所得到的结论显示，在增益脉宽很短时，低增益准分子激光和连续激光的阈值条件完全不同，取决于时间积分增益系数要大于一临界值。

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The doping concentration in the active region has great effect on the waveguide property. With the increasing of doping concentration, the waveguide loss, threshold gain and current density of THz QCL increase, the confinement factor decrease. 3.

结果表明，随着有源区掺杂浓度的提高，波导损耗增加，阈值电流增加，波导限制因子降低。

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Utilizing equivalent external cavity approximation model, the influence of coupling coefficient on the threshold gain of FBG-ECL is discussed.

根据等效腔模型，讨论了耦合系数对FBG ECL阈值特性的影响。

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The coherent threshold for suppressing MI gain is derived, it depends on nonlinear coefficient and refractive index only.

求出了抑制调制非稳增益的相干度阈值，发现这一阈值仅仅取决于介质的非线性系数和折射率。

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Our analysis of one particular structure has shown that a relatively low threshold current density of 832A/ cm2 can provide a threshold optical gain of 50/ cm at room temperature. We have also found that the characteristic temperature in this structure is as high as 136K.

分析显示，用一个相对较低的阈值电流密度（832A/cm2）能够实现室温下产生50/cm的阈值光学增益，而且这种结构的特征温度高于136K。

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On the basis of Maxwell's equations coupled with the rate equations, the lasing threshold of one-dimensional photonic band edge laser is investigated by finite-difference time-domain method with the introduced effective gain distribution factor ( EGDF).

采用麦克斯韦方程和速率方程相结合的模型和时域有限差分法，利用引入的有效增益分布因子概念研究了光子晶体中本征模的阈值特性。

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Meanwhile, the effects of the GaAs barrier thickness and the Al composition in the spacer layer on the threshold gain, the optical confined factor and the resonant wavelength are analyzed by the method.

用该方法模拟分析了有源区两侧GaAs垒层的厚度及spacer层中的Al组份对阈值增益、光限制因子和共振波长的影响。

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The threshold condition of low gain broadband-pulsed excimer laser is closely relative to the pump pulse.

低增益、宽带脉冲准分子激光的阈值条件和其激光泵浦脉冲有密切关系.

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In this paper, we analyse the longitudinal mode threshold gain affected by the dis-continuity of the waveguide in a composite-cavity semiconductor laser diode.

本文分析了复合腔半导体激光器波导的非连续性对纵模阈值增益的影响。

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Especially, the influences of pumping and oscillating spot size to output power and laser threshold with different gain medium are deduced.

通过数值计算了泵浦光斑和振荡光斑大小对输出功率和振荡阈值功率的影响，并与Nd：YVO4和Nd：YAG晶体进行了比较。

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And it takes advantage of the Matlab numerical simulation of the laser and pump light power distribution, analyzes of endoscopic ( optical transmission), pump wavelength, slope efficiency, threshold, the gain medium length of the laser output effects.

并利用了Matlab数值模拟分析了激光与泵浦光的功率分布，分析了腔镜（光透过率）、泵浦波长、斜效率、阈值、增益介质长度对激光输出的影响。

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When the Rabi frequency of the driving field is larger and reach a threshold, a special gain region will appear by adjusting the detuning of the probe field.

驱动场Rabi频率较大而达到某一阈值后，调整探测场的失谐将出现特别增益区。

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