相关实验视频
Updated: Jul 16, 2025

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.0K
概括
一个新的光子发生器使用道化频率合成创建可调节的三角形波形. 这种方法允许灵活调整福里埃序列波,以精确控制波形.
科学领域:
- 光子学 是一个光子学.
- 光学工程是指光学工程.
- 信号处理 信号处理
背景情况:
- 传统的波形发生器在对称性调整性和调控制方面存在局限性.
- 对于先进的光学信号生成,实现对富里埃序列波的精确控制至关重要.
研究的目的:
- 提出和研究一个对称调整的三角形波形光子发生器.
- 展示一个多通道系统架构,用于孤立的子通道操作.
- 为了实现可调节函数波形输出高阶里埃序列适配.
主要方法:
- 使用多通道系统架构与波幅控制用于分通道隔离.
- 采用正方位相位移键调制和连贯的双波长平衡检测,用于光学上升转换.
- 实施一个多变量联合调节算法,以灵活调整富里埃数列子系数.
主要成果:
- 拟议的发电机实现了一个可调整的对称三角波形形状,对称度可调整20%至80%.
- 光学模拟验证了可行性,实现根平均平方误差 (RMSE) 低于或等于0.03.
- 该系统证明了在频率转换过程中有效抑制混合干扰.
结论:
- 开发的光子发生器提供了一种灵活而精确的方法来产生可调节的三角波形.
- 多通道方法和先进的控制算法是实现高保真波形合成的关键.
- 这项技术在光通信和信号处理中具有潜在的应用,需要精确控制的波形.
相关概念视频
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
1.1K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.1K
Generation of Three-Phase Voltage
406
A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
As the rotor...
406
Rectangular and Triangular Pulse Function
766
The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
766
Generating Electromagnetic Radiations
3.0K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
3.0K
Oscillations In An LC Circuit
2.3K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.3K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
837
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
837

