频率上转换的英文

• frequency up-convrsion

• "频率"英文翻译    frequency; rate
• "上"英文翻译    upper; up; upward
• "转换"英文翻译    change; transform; convert; ...
• "上转换" 英文翻译 :    upconversion
• "频率上限" 英文翻译 :    upper frequency limit; upper limit frequency; upper-=frequency limit
• "参量上转换" 英文翻译 :    parametric up-conversion
• "上转换器" 英文翻译 :    upconverter
• "向上转换型" 英文翻译 :    up conversion; upconversion
• "共振频率上限" 英文翻译 :    upper resonant frequency
• "可用频率上限" 英文翻译 :    top usable frequency
• "向上转移频率" 英文翻译 :    roll-off frequency
• "参量上转换器" 英文翻译 :    parametric upconverter
• "升频器 上转换器" 英文翻译 :    upconverter
• "上变频 上转换 升频转换" 英文翻译 :    upconversion
• "半功率频率上限" 英文翻译 :    upper half-power frequency
• "在指定的频率上" 英文翻译 :    on the assigned frequency
• "向上转换型磷光体" 英文翻译 :    up-conversion phosphor
• "在曲面上转换曲线" 英文翻译 :    convert curve on surface
• "上转" 英文翻译 :    rotate upward; superduct; superversion; supravergence; sursumversion
• "频率转换" 英文翻译 :    frequency conversion
• "频率转换器" 英文翻译 :    frequency converter
• "转换频率" 英文翻译 :    inversion frequency; switching frequency
• "采样频率转换" 英文翻译 :    ssrc
• "模拟-频率转换器" 英文翻译 :    analog-to-frequency converter
• "频率转换单元" 英文翻译 :    frequency translation unit

• In chapter 3 , we studied the effect of gaussian transverse profile for the driving and laser fields on lasing without population inversion ( lwi ) in a closed v - type system and an open v - type system . moreover , we discussed also the effect of the unsaturated gain coefficient , the cavity - damping rate , the ratio of the atomic injection rates and atomic exit rate on the corresponding systems . in chapter 4 , we mainly discussed the effect of doppler broadening on the gain , dispersion and the frequency up - conversion of the open v - type lwi system and compared the differences and the same between the open system and the corresponding closed system
  发现： ( 1 )在考虑doppler展宽的情况下，通过选取合适的实验室条件(比如合适的原子环境温度等)可得到合适doppler展宽值，从而使系统获得最佳增益； ( 2 )要想实现系统的频率上转换，同时又要获得足够强的无反转激光增益，则系统频率转换比不能选取的太大； ( 3 )对于开放系统，比较小的粒子注入速率比与退出速率对产生无反转激光是有利硕士学位论文摘要的： （ 4 ）由于dopp1oy展宽的存在，当探测场与驱动场的传播方向相反时，增益在探测场失谐的某一段区域产生振荡，且振荡的振幅、频率失谐范围的大小与dopper展宽的取值有关。
• In this paper , we study inversionless lasing of frequency up - conversion in an open v - type system with incoherent pump . making theoretical analysis and numerical calculation by density - matrix equations of motion , we derive the conditions for the onset of lwi and discuss the effects of the parameters of the system , the detuning of driving field and probe field on the gain , and discuss nonlinear effect in the frequency up - conversion regime . we also give stability and transient analysis
  本论文研究了具有非相干泵浦的开放v型系统频率上转换无粒子数反转激光，利用密度矩阵运动方程，通过理论分析和数值计算，得出该系统产生无粒子数反转激光的条件，讨论系统各参数的变化和驱动场与探测场的失谐对激光增益、色散和粒子数差的影响，还讨论了频率上转换区域的非线性效应，分析了增益的稳定性及系统的瞬态演化过程。