相关实验视频
Updated: Jul 16, 2025

10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
11.6K
通过循环波导晶体和基于二极管的主振荡器功率放大器的周期极化MgO:LiTaO3的紫外线生成
Applied optics
|September 14, 2023
概括
研究人员开发了一种新方法,用于产生380.5nm的高功率,单模近紫外线 (UV) 激光光. 这一进步解决了当前激光二极管技术在医疗成像等应用中的局限性.
科学领域:
- 光学和光子学 在光学和光子学.
- 激光物理 激光物理
- 非线性光学是非线性光学.
背景情况:
- 近紫外线 (UV) 激光对于诸如医学光体激发等应用至关重要.
- 现有的近紫外线范围内的激光二极管在单条纵向模式操作和高光功率方面存在局限性.
- 使用非线性晶体的第二波生成为生成所需的紫外线波长提供了潜在的解决方案.
研究的目的:
- 为了实现高光功率的380.5nm的单一纵向模式激光发射.
- 为了克服当前激光二极管在近紫外线应用中的局限性.
- 为了证明频率翻倍在周期极化的非线性晶体中的有效性.
主要方法:
- 采用二次波生成 (频率翻倍) 采用经期偏向的循环波导晶体,该晶体是用氧化物 (PPMgSLT) 合的石化坦酸盐.
- 使用主振荡器功率放大器 (MOPA) 系统,包括一个分布式布拉格反射器波导激光二极管在761nm作为主振荡器和一个渐变的放大器.
- 将PPMgSLT晶体与MOPA系统一起送,提供高达5W的光功率.
主要成果:
- 成功实现了380.5nm的单纵向模式激光发射.
- 在目标波长下产生高达13mW的光学功率.
- 展示了一种生产高功率,窄线宽近紫外线激光光的可行方法.
结论:
- 使用PPMgSLT开发的频率翻倍技术有效地产生近紫外线光谱范围内的高功率单纵向模式激光辐射.
- 该方法为需要特定近紫外线波长的应用提供了有前途的解决方案,克服了直接激光二极管发射的局限性.
- 结果为医学和其他需要精确紫外线光源的领域的增强应用铺平了道路.
相关概念视频
MOSFET Amplifiers
185
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
185
Half wave rectifier
1.2K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
1.2K
Full wave rectifier
1.3K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
1.3K
Small-Signal Analysis of MOSFET Amplifiers
594
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
594
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

