相关实验视频
Updated: Sep 11, 2025

08:21
Laser-induced Forward Transfer for Flip-chip Packaging of Single Dies
Published on: March 20, 2015
12.6K
概括
这项研究引入了一种创新的方法,用于创建高峰功率的短脉冲激光器,使用垂直集成复合体腔VCSEL. 这些激光器达到千瓦级的峰值功率,为先进的激光应用铺平了道路.
科学领域:
- 光学和光子学 在光学和光子学.
- 半导体激光器半导体激光器
- 高功率激光器 高功率激光器
背景情况:
- 芯片级,千瓦级的高峰功率短脉冲激光器对于各种应用至关重要.
- 现有技术在实现单体集成和高峰功率同时面临限制.
研究的目的:
- 探索垂直集成复合腔VCSEL中的级联能量转换和振荡.
- 为千瓦级高峰功率短脉冲单体集成激光器建立一个新的路线.
主要方法:
- 通过使用等效共振器理论研究了稳定的振荡条件.
- 导出同时合的速率方程来探索合的振荡动态.
- 分析了P-DBR反射率和Nd:YAG吸收率的影响.
主要成果:
- 在100μm光圈VCSEL中实现了稳定的脉冲,峰值功率为137.1kW,脉冲能量为24.9μJ,脉冲宽度为123.7ps.
- 使用2D VCSEL阵列,获得了高达83.9mJ的最大脉冲能量,斜率效率为0.54W/A.
- 从扩展的2D连贯VCSEL阵列中证明了高光质量.
结论:
- 垂直集成复合材料腔体VCSEL为高峰功率,短脉冲激光生成提供了可行的途径.
- 这种方法可以在芯片上集成超过千瓦的峰值功率的新型激光阵列.
- 潜在的应用包括远程激光检测和测距.
相关概念视频
Cascaded Op Amps
731
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
731
Modeling of Diode Forward Characteristics
656
Understanding the behavior of diodes when forward-biased is a fundamental aspect of electronic circuit design and analysis. This analysis primarily utilizes two models: the exponential diode model and the constant-voltage-drop model. The exponential model comes into play when the source voltage exceeds 0.5 volts, pushing the diode current to rise exponentially above the saturation current. This relationship is graphically depicted in the current-voltage (I-V) curve, illustrating the diode's...
656
Design Example: Capacitance Multiplier Circuit
962
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
962
Modeling of Diode Reverse Characteristics
372
In electronic circuits, reverse-biased diode configurations are critical for regulating voltage levels. Zener diodes exploit the reverse breakdown phenomenon and exhibit a controlled breakdown at a specific Zener voltage (VZ). They are designed to maintain a constant voltage across their terminals and are commonly used for voltage regulation in circuits.
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
372
MOSFET: Enhancement Mode
478
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
478
Energy Losses in Transformers
974
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality, the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
974

