1) Gain and bandwidth of the small signal
小信号增益和带宽
2) Small-signal gain
小信号增益
1.
The XPM has an effec on the small-signal gain.
本文建立了考虑交叉相位调制效应(XPM)的光放大模型,得到了(XPM)效应对小信号增益系数的影响,分析得到:掺铒光纤放大器(EDFA)中XPM引起的强度起伏和非线性系数、输入的泵浦功率以及放大器长度有关。
2.
The vibrational-state populations of CO molecules and small-signal gain with magnetic field are calculated.
CO分子各振动能级均获得更大的布居数和激光小信号增益。
3.
A compact subsonic CW chemical oxygen-iodine laser (COIL) was firstly used as a probe to measure the temporal and spatial dependence of the small-signal gain in a supersonic CW COIL.
首次利用一台亚音速小型连续波化学氧碘激光器做探测光源,用放大法直接测量超音速化学氧碘激光器的小信号增益系数,测得了小信号增益系数随时间和气流方向的变化。
3) small signal gain
小信号增益
1.
Research for the relation between small signal gain coef ficient and pump-energy density of high-power off-axis two-pass amplificati on;
离轴高功率双程放大系统中小信号增益系数与泵浦能密度关系研究
2.
The influences of the small signal gain and loop s time asymmetry on the switching characteristics of TOAD are studied in detail considering thoroughly the effects of the gain saturation and recovery of the semiconductor optical amplifier (SOA) in a terahertz optical asymmetric demultiplexer (TOAD).
充分考虑了太赫兹光非对称解复用器 (TOAD)中半导体光放大器 (SOA)的增益饱和与恢复的影响 ,深入分析研究了小信号增益及环时间非对称性对TOAD开关特性的影响 。
3.
The numerical results were given by solving the dispersion equation and the small signal gain curve was derived.
在带状电子束假设下,采用场匹配和导纳匹配的方法,导出了存在电子束的任意槽矩形波导栅行波管的"热"色散方程,对该方程进行数值求解,得到了小信号增益,分别讨论了慢波结构槽形状和电子束参量对小信号增益的影响,为毫米波矩形波导栅行波管的设计提供了理论依据。
4) gain bandwidth
增益带宽
1.
For the certain pump wavelength and signal wavelength, it is indicated that the non collinear incident angle exists with the maximum gain bandwidth and the higher gain.
研究结果表明 ,对于一定波长的抽运光 ,存在一定的非共线入射角对应一定波长的信号光 ,使在较高的激光增益下增益带宽最大 ,同时温度的调谐也对增益谱的形状有部分影响。
2.
The parametric bandwidth and gain bandwidth of KBe2BO3F2(KBBF) for noncollinear phase matching have been studied,together with the change of noncollinear angle,signal wavelength and pump intensity.
在非共线相位匹配下研究了KBe2BO3F2(KBBF)晶体的参量带宽和增益带宽随非共线角、信号光波长及泵浦光强度的关系。
3.
The gain bandwidth of optical parametric chirped pulse amplification pumped by divergent beams has been theoretically studied.
对发散光束抽运的光参量啁啾脉冲放大器的增益带宽进行了系统的理论研究。
5) Saturated signal gain
饱和信号增益
6) small signal gain coefficient
小信号增益系数
1.
Under the condition of charge voltage of 23 kV and pumping energy density of 10 0 J/cm 3, the average small signal gain coefficient of 4 99%cm -1 and energy storage efficiency of 3 0% are obtained in experiments.
在充电电压为 2 3kV ,抽运能量密度为 10 0J/cm3 的条件下 ,获得了平均值为 4 99%cm-1的小信号增益系数和 3 0 %的储能效率。
2.
Under the condition of charge voltage of 23 kV and pumping energy density of 11 J/cm3, the small signal gain coefficient distribution uniformty in full aperture of 4×2×3 multi-segment-amplifier is 1.
利用CCD增益测试系统对一台闪光灯抽运、通光口径为 2 9cm× 2 9cm的新型高功率固体激光阵列式片状放大器的增益分布进行了实验测试 ,在充电电压为 2 3kV、抽运能密度为 11J/cm3 的条件下 ,新型 4× 2× 3阵列式片状放大器全口径范围内的小信号增益系数的峰值与平均值之比为 1。
3.
Corresponding formula of small signal gain coefficient was given which is precise, compact and explicit.
提出了球面反射镜的放大自发辐射(ASE)方法测量小信号增益的理论模型,给出了相应的小信号增益系数的计算公式。
补充资料:采样和信号再现
采样和信号再现
sampling and signal reproduction
为保证采样信号经适当处理后能再现原连续信号,采样周期的选取应符合采样定理。丢琶—于不一-┌─┬─┐│ │…│└─┴─┘ 图1采样 (a)被采样的连续信号;(b)采样开关; (c)采样信号 连续信号x(t)变换为频域函数X(f),其频谱如图2(a)所示。理想采样信号的表达式为x。(t)一x(t)x艺叔t一。T),经傅里叶变换后化为频域函数:x;(f)一粤至x(f一。式)。若采样频率fs一粤为几 T。里扩“、“’,s’。侧z卜门~一“’TZ子““的两倍,则有图2(b)所示的理想采样信号频谱,fll为连续信号中所含的最高次频率。在图2(b)中,包含原连续信号频谱以及无限个经平移的原连续信号频谱。若使理想采样信号通过一截止频率为几和一几的低通滤波器,则滤波后的频谱与原连续信号的频谱完全一致,即再现了原信号。采样频率人必须大于被采样的连续信号中所含最高次频率的两倍,这就是香农(S hannon)采样定理,它是保证采样信号再现成原信号的必要条件。一Zfs一介一几O几乃2几f (C) 图2连续信号和采样信号频谱 (a)连续信号频谱;(b)采样信号频谱; (c)频谱混叠 若大<2几,则产生频谱混叠,如图2(c)所示,一几至几间对应于原连续信号频谱的高频分量和平移频谱的低频分量混叠在一起,经过低通滤波,也不能恢复原信号的频谱,必须避免这种情况的发生。colyong he川n匕00 zolx{on采样和信号再现(sampling and signal repro-duction)连续信号经采样产生离散信号和离散信号近似地恢复为原连续信号。它用于采样控制系统的分析研究。 如图1所示,连续信号x(t)经采样器采样后成为脉冲序列。采样器是以采样周期T重复开闭动作的采样开关。经采样开关输出的脉冲序列为采样信号瓜(t),:为采样持续时间。 当:足够小时,采样信号x。(t)为连续信号x(t)与单位冲激序列价(t)一艺武t一nT)的乘积,即xs(t)一x(t)价(t)。这种情况称为理想采样,是实际采样的理想化,用以简化采样过程的分析,而不影响本质。低通滤波器的特性如图2(b)中矩形虚线框所示,这是理想化了的,实际上无法做到准确的矩形。因此,fs刚刚大于2几还不够,而是应该有相当的裕度,工程上一般取fs一(4一6)介。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条