相关实验视频
Updated: Jun 29, 2025
13:31
High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
Published on: December 22, 2015
15.0K
一个宽带,高分辨率的向量频谱分析仪,用于集成光子学
Yi-Han Luo1,2, Baoqi Shi1,3, Wei Sun1
1International Quantum Academy, 518048, Shenzhen, China.
Light, science & applications
|April 7, 2024
概括
我们开发了一种用于光学光谱分析的新型矢量光谱分析仪 (VSA). 这种紧的设备准确地测量了被动设备属性,并绘制了宽带激光光谱,推进了光子系统.
科学领域:
- 光子学和光谱学 在光子学和光谱学.
- 光学工程是指光学工程.
- 激光物理 激光物理
背景情况:
- 光学光谱分析对于理解物质至关重要,光谱仪可以检测微量气体和同位素分析.
- 越来越多的数据需要更高的光谱带宽和频率分辨率来进行频谱分析,特别是对于宽带激光器和分散装置.
- 需要频谱分析器来探测编码信息的相应反应,推动测量技术的创新.
研究的目的:
- 展示一种新型矢量频谱分析仪 (VSA),能够在单个设置中表征被动设备和主动激光源.
- 为了使被动设备的全面分析,包括损失,相应反应和分散.
- 为了先进的应用,将宽带激光光谱连贯地映射到射频 (RF) 领域.
主要方法:
- 开发一种新的,紧的,强大的基于纤维的矢量光谱分析仪 (VSA).
- VSA在没有高速调制器,光探测器或主动反控制的情况下运行.
- 利用VSA来表征集成分散波导,绘制频率光谱和连贯光检测和距离 (LiDAR).
主要成果:
- VSA 实现了 55.1 THz (1260-1640 nm) 的带宽,频率分辨率为 471 kHz,动态范围为 56 dB.
- 成功描述了被动设备,测量损失,相应响应和分散性质.
- 在射频领域展示了宽带激光光谱的连贯映射.
结论:
- 新型双模式VSA为设备分析和激光光谱学提供了一种创新的方法.
- 这种紧而坚固的VSA适用于传感,通信,成像和量子信息处理的各种应用.
- 在未来光子系统的进步中,VSA可以发挥关键作用.
相关概念视频
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
215
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
215
01:17Bandpass Sampling
175
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
175
01:26Raman Spectroscopy Instrumentation: Overview
332
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
332
01:18Aliasing
133
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
133