optical carrier

Optical Carrier and Microwave Subcarrier Frequency Division Multiplex Optical Fiber Communication Systems

光载波频分多路和微波副载波频分多路光纤通信系统

Millimeter-wave radio-over-fiber downlink transmission system based on optical carrier suppression up-conversion

基于载波抑制调制的毫米波ROF下行链路传输系统

The effect of three parameters such as modulation index , dispersion distance and optical carrier suppression ratio is also discussed .

讨论了调制系数、色散光纤距离和载波抑制功率等因素对毫米波信号及各次谐波传输性能的影响。

At the receiver , the modulated optical carrier can be examined from a frequency filter to render target detection .

在接收端，通过频率滤波实现对编码信号的提取，由编码信号的信号处理实现激光雷达水下目标探测。

Meanwhile , this system can also realize the reuse of the central optical carrier , which can simplify the structure of the base station .

同时，该系统还实现中心站光载波的重用，有利于简化基站的结构。

These signals are used to modulate the optical carrier , and then the optical signal is transmitted to the remote base station by optical net .

这些信号调制到光载波上，然后光信号再通过光纤网络传输到远端基站。

With the development of few-cycle pulses ( FCP ), the phase shift of the optical carrier with respect to the pulse envelope becomes non-negligible .

随着周期量级激光脉冲的产生，脉冲载波及包络之间的相对相位漂移逐渐成为不容忽视的问题。

A novel way to implement Optical Carrier Suppression and Separation ( OCSS ) is proposed and the impacts of parameters of Mach-Zehnder ( M-Z ) are analyzed .

提出了一种实现光载波抑制与分离（OCSS）的新方法，并分析了M-Z调制器参数对所产生的纵模的影响。

Every antenna element in the system corresponds to a different optical carrier . Different time delays between adjacent channels are obtained due to the chromatic dispersion of fiber delay lines ( FDLs ) .

系统中每一个天线子阵对应一个光载波，共享的是光纤延迟线（FDLs），利用光纤色散在不同的子阵间产生不同的延迟。

And two different schemes are proposed on the basis of DPMZM : 1 . A microwave photonic phase shifter based on the suppression of the optical carrier single-sideband modulation mode . 2 .

在DPMZM的基础上相应提出了两种不同的方案：1.基于抑制光载波的单边带调制方式（CS-SSB）的微波光子移相器。

Traveling wave ( TW ) electrode structure is widely used for it needs less multi-action length between optical carrier and digital modulation and can get rid of contribution capacity 's constraints on modulation bandwidth .

行波电极（Travelingwaveelectrode，TW），是目前广泛采用的一种电极结构，可缩短光载波与调制信号的互作用长度，可有效避免分布电容（Contributioncapacity，CR）对调制带宽的限制。

With two light source generating optical carrier , the modulated carrier signal is processed by microwave photonic filter , completing instantaneous frequency measurement , but it is complex , high cost and a small range of bandwidth .

利用两个光源产生光载波，采用光子滤波器对调制载波信号进行处理，可以实现瞬时测频，但结构复杂，成本较高，测频带宽窄。

The third form is to use a single optical carrier transmitting frequency division multiplex of electrical carriers as sub-carriers ( SCM ), to be applied to opical fiber cable television ( CATV ) broadcasting network .

第三种是电载波作为副载波的频分多路（SCM），由一个光载波传输，用于光纤有线电视（CATV）广播网。

Indispensable for high quality optical carrier signal reception in a large dynamic range , AGC analog optical receivers are widely used in the optical transmission of radio and microwave signals , such as fiber CATV , direct broadcast satellite TV , wireless communication and radar .

自动增益控制模拟光接收机广泛应用于光纤有线电视、光纤直播卫星电视、无线通讯及雷达等射频微波信号光传输，是实现大动态范围光载波信号高质量接收必不可少的一项技术。

The dissertation firstly introduce the system architecture and principle of the microwave photonic phase shifter based on the suppression of the optical carrier single-sideband modulation mode , verify the feasibility by experiments , point out the deficiencies of the scheme and propose the improved measure .

论文首先对基于抑制光载波的单边带调制方式的微波光子移相方案进行系统结构介绍和原理分析，并通过实验验证方案的可行性，指出了方案的不足，并提出了改进措施。

The formation mechanism of optical generalized carrier fringes and the digital demodulation technique are investigated theoretically and experimentally . An optical technique for modulating generalised carrier fringe patterns is described .

从理论上和实验上研究了光学广义载波条纹图形成的机理及其数字解调技术，同时还给出了光学调制广义载波条纹的实验技术。

To insure the insertion loss of the switch at its on state , the effective penetration of the optical induced carrier layer should be equal to the thickness of the Si dice in the model .

在所建模型中，要求光生载流子层的等效深度要近似等于所加载Si片的厚度，以保证开关导通时较低的插入损耗。

Application of High Power Optical Amplifier to Carrier Suppressed Analog Fiber Optic Communications

高功率光放大器在载波抑制模拟光纤通信中的应用

A method of verticality adjusting between optical axis and carrier in Two-Dimensional vision measurement

二维视觉测量中光轴与载物台垂直度调节方法

Influences of Substrate Temperature and Annealing on Optical Properties and Carrier Concentration of CdIn_2O_4 Thin Films

基片温度和退火对CdIn2O4薄膜光学性质和载流子浓度的影响

Optical spectroscopy study on carrier concentration and mobility in GaN

GaN载流子浓度和迁移率的光谱研究

Testing large curvature surface of optical element with spatial carrier heterodyne interferometry

大曲率光学零件面形的空间载频外差干涉术检测

In recent years , taking the optical fiber as the carrier of EPON access technology in China has been a very good and popular solution .

近几年，以光纤为载体的EPON接入技术在中国得到了很好的普及发展。

Electrical and optical analyses indicate the carrier concentration , optical transmittance and optical energy gap increase when the dopant ratio is raised from 0.75 % to 1.5 % .

从电学分析看出：掺杂比从0.75%增至1.5%过程中，膜的载流子浓度、透射比（在波长大于500nm的范围）和光隙能相应增大。

Momentum and energy relaxation , carrier-carrier scattering , intervalley and intravalley scattering , optical phonon scattering and carrier diffusion have been investigated extensively .

动量和能量驰豫，载流子－载流子散射，谷间和谷内散射，光学声子散射，载流子扩散等机制都已被广泛研究。

It has been suggested that the system with newly developed PCF as the transmission medium and the optical soliton as the carrier could be one of the best ways for future deep-sea communications .

指出未来适用于深海探测、深海通信的最佳方式之一就是采用新型光子晶体光纤为传输媒介、以光孤子为载体的光纤孤子通信系统。

In the broad-band dynamic model , the material gain profile , the longitudinal variation of the optical field , the carrier density , photon density , and the broad-band spontaneous noise emission are considered in the model .

在宽带理论模型中，考虑了SOA的材料增益谱、光场纵向空间分布、载流子空间分布和宽带ASE谱等。

Employing these five ways synthetically and fully utilizing existing optical cable resources and carrier wave route resources , an economical , practical , independent backup data channel for unattended transformer substation of Sheyang power-supply company has been built .

综合应用这5种方式，充分利用现有光缆资源和载波路由资源，为射阳县供电公司无人值班变电站搭建了经济、实用、独立的备用数据通道。

Novel technique for optical label switching based on optical carrier suppression

基于光载波抑制的光标记交换新技术

A novel scheme for optical millimeter ( mm ) - wave generation with optical carrier suppression ( OCS ) modulation by external modulator in a radio-over-fiber ( ROF ) system was proposed .

提出了一种改进的光载波抑制产生光毫米波的方法。