和频

粒子数压缩态光场参与的和频过程

Sum Frequency Generation With Photon Number Squeezed Light as Input

MgO：LiNbO3晶体中双波长Nd：YAP激光的和频作用

Sum frequency Action for Dual Wavelength Nd ∶ YAP Laser in MgO ∶ LiNbO 3 Crystal

高平均功率腔内和频蓝光Nd∶YAG激光器

High power blue Nd ∶ YAG laser by intracavity summing frequency

双光子激发Na4d~2DJ态的光学四波和频过程

Two-photon Resonant Optical Four-wave Sum-frequency Processes using Na_4d ~ 2 D_J State

HF信道的OFDM系统联合定时和频移估计技术

Joint Estimation of Time and Frequency Offset of OFDM in HF Channel

讨论被动调Q速率方程的解析解，结合三波耦合方程讨论影响和频转换效率的因素。

Combine with the three-wave coupled equations to discuss the impact of frequency conversion efficiency .

该文提出了一种基于FFT的联合帧同步和频偏估计算法，可有效地消除频偏对帧同步性能的影响，频偏估计范围可达一只。

This paper presents a new combined algorithm based on FFT for frame synchronization and frequency offset estimation .

LD抽运Nd∶YVO4/LBO腔内和频橙黄光连续激光器

Laser diode pumped Nd ∶ YVO_4 / LBO continuous wave orange-yellow laser with intracavity sum frequency mixing

报道了LD纵向泵浦Nd：YVO4晶体，经腔内和频得到593nm激光输出的实验研究。

An LD-end-pumped Nd : YVO_4 crystal 593 nm yellow laser by intracavity sum-frequency mixing ( SFM ) is reported .

LBO腔内和频593nm激光器

Intracavity sum - frequency mixing with LBO in 593 nm laser

Hg蒸气中双光子共振四波和频产生XUV相干光的研究

The Generation of Coherent XUV Radiation by Two-photon Resonant Four-wave Sum-mixing in Hg Vapour

激光二级管泵浦KTP腔内和频激光器及噪声特性的分析

Noise characteristics of laser diode pumped solid-state laser by intracavity sum-frequency of KTP phase matching II

用KDP晶体和频产生0.355nm紫外光

The Generation of 0.355 μ m UV Light by Using KDP Crystal as Sum & frequency Mixing

正交频分复用（OrthogonalFrequencydivisionMultiplexing，OFDM）技术在解决无线移动通信系统中显示了许多特点，如抗多路径衰落和频际间的干扰等。

Orthogonal Frequency Division Multiplexing ( OFDM ) is an effective transmission scheme to cope with many impairments , such as cochannel interference , serve multipath fading and impulsive parasitic noise .

分析了几种联合定时估计和频偏估计算法的性能和优缺点，设计了基于HAPS的OFDM同步方案。

The performance of several timing estimation and frequency offset estimation algorithm are analyzed and OFDM synchronization strategy is proposed based on HAPS platform .

分析了差分方程的耗散性和频散性以及Boussinesq项和修正项对它们的影响。

The dissipation and frequency dispersion of the difference equation were analysed and on which the effects of Boussinesq term and correction term os well .

由于雷达回波的时变和频变特性，使得当基于FFT处理进行ISAR成像时，图像上存在许多扩展散射点和虚假响应，严重影响了图像质量，并对ISAR像的后续处理带来困难。

Due to time-varying and frequency-varying characteristics , ISAR imagery based FFT processing is seriously blurred because there are many extended scattering centers and artificial responses on the imagery , and it makes following processing more difficult .

求解出了有效非线性极化系数d（eff）达到最大值的条件，得到有效和频系数随θ角变化的曲线，从而对实验中晶体角度的调节提供了理论依据。

Meanwhile , the condition of maximal d_ ( eff ) and effective sum-frequency coefficient were figured out on this analytic solution , which provided theoretical guide to angle adjustment of the crystal .

该传输方案采用DFT进行频域扩频，采用逆滤波器组变换（IFBT）实现频分复用和频分多址。

The scheme achieves spreading gains in the frequency-domain by discrete fourier transform ( DFT ), and the frequency division multiplexing ( FDM ) and FDMA by inverse filter-bank transform ( IFBT ) .

研究了单模圆石英光纤在不同偏振光泵浦条件下，受激拉曼散射（SRS）各级斯托克斯光的拉曼阈值和频移特性，同时测试了光纤输出端的泵浦光和斯托克斯光的偏振状态。

The Raman threshold , frequency-shift and the states of Stokes spectrum of stimulated Raman scattering under the condition of different polarized pump light in single mode circle core optical fiber were studied . The polarization of pump and Stokes spectrum at output terminal of fiber were measured .

线性高达信号变化33dB时，输入输出信号变化差为0.08dB；和频信号最大线性输出达1.34mW；

Variation difference between output and input signals is 0.08 dB when variation of signal equals 33 dB The maximum output power of sum-frequency signal is 1.34 mW ;

研究了级联三能级系统中孪生色锁随机光场的相位共轭阿秒和频极化拍频（ASPB）不对称新效应。

The new effects of phase-conjugation asymmetric attosecond sum-frequency polarization beat ( ASPB ) of twin composite color-locking stochastic fields in cascade three-level system are investigated .

基于两双光子过程的相位共轭二阶极化干涉，从理论上研究了四能级系统在阿秒量级的不对称和频极化拍频（FASPB）。

Based on the phase-conjugation polarization interference between two two-photon processes , we theoretically investigated the attosecond scale asymmetry sum-frequency polarization beat in four-level system ( FASPB ) .

研究了四频激光陀螺和频与温度之间的关系。

The relation of frequency sum to temperature is studied .

空分和频分混合接入方式下的无线资源调度算法

Radio resource allocation algorithm for combined frequency and spatial multiple access schemes

边带和频作用在宽频带激光频率转换中的贡献限制

Contribution limitation of side-band sum-frequency processes to laser frequency conversion

全固态复合式内腔和频500.8nm连续波青光激光器

All-Solid-State Continuous-Wave Doubly Resonant All-Intracavity Sum-Frequency Mixing Cyan Laser at 500.8 nm

波差导数；四波混频过程中差频与和频的竞争研究

The Competition between Two-Photon Resonance Four Wave Frequency Difference and Sum Mixings

双轴晶体和频效应的相位匹配拓朴分析

Phase-matching topology of sum-frequency generation in biaxial crystals

四频激光陀螺和频与温度关系的研究

Research on the relation of frequency sum to temperature in the four frequency RLG