Description: 超低速的光纤一体发接收发送器,同于以前的光纤一体化接头都只适用于2M以上的通讯,如需将232等低速信号用光纤传输出,需要加复杂的调制解调电路,网动光电新生产的这款光纤头主要针对低速信号,可以传送DC-500KPS的信号,极大地简化了硬件设计.-Ultra-low-fat whole-speed fiber-optic transmitter receiver with fiber-optic integration in the previous joint only applies to more than 2M communications, etc. For the 232 low-speed optical fiber transmission of signals, the need to increase the complexity of the modulation and demodulation circuit, the net move Photoelectric new production of this first major response to low-speed fiber-optic signal, DC-500KPS can send the signal, greatly simplifying the hardware design. Platform: |
Size: 96256 |
Author:俞国良 |
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Description: 光通信中归零型（占空比可调）差分相位调制信号建模与仿真分析-Optical Communication zero type (duty cycle adjustable) differential phase modulation signal modeling and simulation analysis Platform: |
Size: 9216 |
Author: |
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Description: 光纤是20世纪的重大发明之一，其导光性能臻于完美，很难想像还会有更好的替代者。本书是光学、光子学和光通信领域的重要译著，分原理篇和应用篇两部分。原理篇包括光传输方程、群速度色散、自相位调制、调制不稳定性和光孤子、偏振效应、交叉相位调制、受激散射和光参量过程等内容，科学归纳为非线性光纤光学，侧重于基本概念和原理。应用篇内容包括光纤光栅、光纤耦合器，各种光纤干涉仪、光纤放大器和光纤激光器，光脉冲压缩技术，以及有关光纤通信系统和孤子波系统中的传输问题，体现了非线性光纤光学在光波技术、光通信领域的应用。全书理论严谨，处处结合实际例证，特别是紧密结合光通信领域的新成果与新问题，图文并茂，说清讲透，且各章都附有习题。本书适合作为光学、物理学、电子工程等专业的本科生和研究生教学用书，同时对从事光通信产业的工程技术人员和从事光纤光学、非线性光学领域研究的科技人员来说也是一本非常有用的参考书。 -Fiber is an important invention of the 20th century, one of the optical properties of reaching perfection, it is hard to imagine there will be a better replacement for him. This book is optical, photonics and optical communication field of translation, principles and application of Part Part two parts. Principles of articles, including optical transmission equation, group velocity dispersion, self-phase modulation, modulation instability and optical soliton, polarization effects, cross-phase modulation, stimulated scattering and optical parametric process, such as content, science summed up as non-linear fiber optics, with a focus on basic concepts and principles. Application papers will include fiber gratings, optical fiber coupler, a variety of fiber-optic interferometer, optical fiber amplifiers and fiber lasers, optical pulse compression technology, as well as optical fiber communication systems and soliton wave transmission system, reflects the non-linear fiber optics in light wav Platform: |
Size: 17445888 |
Author:罗飞 |
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Description: 在光纤通信系统中，光纤中传输的是二进制光脉冲"0"码和"1"码，它由二进制数字信号对光源进行通断调制而产生。而数字信号是对连续变化的模拟信号进行抽样、量化和编码产生的，称为PCM（pulse code modulation），即脉冲编码调制。这种电的数字信号称为数字基带信号，由PCM电端机产生。-In optical fiber communication systems, fiber-optic transmission of light pulses is a binary " 0" code and " 1" code, which is a binary digital signal to carry out on-off modulation source derived. The digital signal is a continuously variable analog signal sampling, quantization and coding generated is called PCM (pulse code modulation), or pulse code modulation. Such as digital signal power digital baseband signal by the PCM client machine generated electricity. Platform: |
Size: 1024 |
Author:圈石 |
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Description: 本书详细论述了光纤中的各种非线性效应.全书共分 10章.分别介绍了光纤和非线性光学，光纤模式及有非线性源时脉冲的传输，综述了光纤中的基本传输方程的数值方法、群速度色散、自相位调制、··… 等内容.本书自始至终强调了各种非线性效应对光ill信的影响，对从事非线性光纤光学研究及光纤通信的科研人员及大学教师、本科生和研究生是一本非常有用的参考书.
-This book discusses in detail the various nonlinear optical effects. The book is divided into 10 chapters. Introduced the fiber and nonlinear optics, optical fiber non-linear source model and the pulse transmission, an overview of the basic fiber transfer equation and numerical method, group velocity dispersion, self phase modulation,** ... and so on. This book consistently emphasize a variety of nonlinear effects of light ill effects of the letter, engaged in non-linear fiber optics and fiber optic communications R & D personnel and university teachers, undergraduate and graduate students are a very useful reference book. Platform: |
Size: 8602624 |
Author:yangiy |
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Description: 本书详细论述了光纤中的各种非线性效应.全书共分 10章.分别介绍了光纤和非线性光学，光纤模式及有非线性源时脉冲的传输，综述了光纤中的基本传输方程的数值方法、群速度色散、自相位调制、··… 等内容.本书自始至终强调了各种非线性效应对光ill信的影响，对从事非线性光纤光学研究及光纤通信的科研人员及大学教师、本科生和研究生是一本非常有用的参考书.
-This book discusses in detail the various nonlinear optical effects. The book is divided into 10 chapters. Introduced the fiber and nonlinear optics, optical fiber non-linear source model and the pulse transmission, an overview of the basic fiber transfer equation and numerical method, group velocity dispersion, self phase modulation,** ... and so on. This book consistently emphasize a variety of nonlinear effects of light ill effects of the letter, engaged in non-linear fiber optics and fiber optic communications R & D personnel and university teachers, undergraduate and graduate students are a very useful reference book. Platform: |
Size: 8848384 |
Author:yangiy |
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Description: 高功率瞬态电场的测试是电磁环境效应评估与防护研究领域的难点。笔者基于有源电光调制法，设
计了一种高功率瞬态电场传感器。通过建立简化的等效电路模型，并借助CST 微波工作室对该传感器的结
构建模仿真，分别从频域和时域分析了接收天线负载对传感器接收特性的影响，并得到了一致的结果。结果
表明：接收天线采用单极子天线，负载采用低阻时响应信号为被测电场的微分信号，采用高阻时响应电压与
被测电场场强成正比，通过改变负载电容取值可以控制传感器量程。-High power transient electric field testing is electromagnetic environment effects assessment and protection of areas of difficulty. The author based on active electro-optic modulation method, the design of a high power transient electric field sensors. Through the establishment of a simplified equivalent circuit model, and with the CST MICROWAVE STUDIO sensor structure modeling and simulation, respectively, from the frequency domain and time domain analysis of the receiving antenna receives the load characteristics of the sensor, and get consistent results. The results showed that: the receiving antenna using monopole antennas, low-impedance load using the response signal is a differential signal measured electric field, using high impedance response voltage proportional to the measured electric field strength, by changing the value of the load capacitance sensor can be controlled range. Platform: |
Size: 305152 |
Author:张毛毛 |
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Description: We have proposed a digitally implemented QPSK system for Free-Space Optics (FSO) systems for future satellite missions. We have used a Laser source of 1550nm wavelength and data rate of 2.5Gbps.The system consists of a modulating and a demodulating block and an advantage of filters added to improve the performance and optimize errors like noise. The best suited modulator for FSO is Mach-Zehnder modulator which is tuned for high performance. The LiNB03 demodulator demodulates the signal which in turn passed to a filter to attenuate the demodulated output and then through an amplifier to increase the signal strength. Digital approach for implementation of QPSK Modulation is attempted here and compared with existing systems. Simulation and characterization is done to freeze design parameters. The system mainly concentrates on parameter like performance, security, minimum size and cost saving which will be the future of satellite communications. Platform: |
Size: 447488 |
Author:muhand |
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Description: 基于波导的相位调制,利用铌酸锂的电光效应，在波导上家电压实现相位调制-Phase modulation based on waveguides, using the electro-optic effect of lithium niobate, the phase modulation of the home voltage on the waveguide Platform: |
Size: 1024 |
Author:宋红 |
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Search - optic modulation