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- The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG). 在非线性光学领域,超外差原理就是著名的差频产生(DFG)技术。
- Various wavelength conversion (WC) techniques are introduced, and two are chosen to be used in all optical transparent networks. These are four wave mixing (FWM) and difference frequency generation (DFG). 该文首先简单介绍各种波长变换技术;对比它们的优缺点;选出两种能用于未来全光透明网络中的波长变换技术:四波混频波长变换技术和差频波长变换技术.
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO?3 waveguides have been theoretically studied. 对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。
- The principle of all-optical wavelength conversion based on the cascaded sum and difference frequency generation (SFG+DFG) in quasi-phase-matched (QPM) periodically poled LiNbO3 (PPLN) waveguides is introduced. 介绍了基于准相位匹配周期极化反转铌酸锂光波导的和频与差频(SFG+DFG)级联型全光波长转换技术的基本原理。
- In chapter five, the generation principle of THz-wave is introduced. The generation of THz-wave using Cerenkov-type difference frequency generation (DFG) is also discussed theoretically. 第五章讨论了THz波的产生机理,并对切伦科夫型差频产生THz波进行了理论分析。
- All-optical wavelength conversion (AOWC) is mainly implemented by using four nonlinear effects: cross gain modulation (XGM), cross phase modulation (XPM), four wave mixing (FWM), and difference frequency generation (DFG). 实现全光波长转换主要利用四种非线性效应 :交叉增益调制 (XGM)、交叉相位调制 (XPM)、四波混频 (FWM)和差频 (DFG)效应。
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO3 waveguides have been theoretically studied. 对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。
- difference frequency generation(DFG) 差频产生
- Different frequency resolution in human hear. 人耳对不同频率的分别率是不同的。
- Two different frequency, and there is no resonance. 双方不同频，因此也就无法共振。
- different frequency generation 差频过程
- Each of these pieces is a sine wave with a different frequency. 每个小部分是有着不同频率的正弦波。
- Radio Beijing broadcasts on a dozen different frequencies. 北京电台以十几种不同的频率进行广播。
- Keywords environmental monitoring;difference frequency generation（DFG）;quasi-phase-matching;periodic poled lithium niobate（PPLN）;CH2O; 环境监测;差频产生;准相位匹配;周期极化铌酸锂;甲醛;
- By change some pellucid parameters, this model can work in different frequency. 通过一些直观的参数设置，可使线圈模型适用于不同的频率范围。
- Various Buddha's names that teem in the sutra represent different frequency. 其内文均为各佛菩萨的名号，亦代表著各种不同的频率。
- To cause beating by superposing waves of different frequencies. 振动叠加不同频率的波以产生拍差，拍音
- They tested his hearing with pure tones of different frequencies. 他们用不同频率的纯音测试她的听力。
- This radio station broadcasts on three different frequencies. 这家电台以三种不同的频率广播。
- difference frequency generation 差频生成
