概括
一个新的射频 (RF) 激发波导二氧化碳 (CO2) 激光系统为连贯检测激光器提供频率可调性. 这个主振荡器功率放大器系统实现0.29GHz调范围,输出功率为23.7W.
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
- 应用物理 应用物理
背景情况:
- 主振荡器功率放大器 (MOPA) 系统对于可调节激光应用至关重要.
- 无线电频率 (RF) 激发波导二氧化碳 (CO2) 激光器在紧性和效率方面具有优势.
- 实现单一纵向模式运行,具有广泛的可调性是激光开发的一个关键挑战.
研究的目的:
- 为了展示一个频率调节,单条纵向模式的MOPA系统.
- 为了研究用于激光雷达应用的RF激发波导CO2激光器的性能.
- 为了在单个纵向模式内实现广泛的连续调范围.
主要方法:
- 使用RF激发波导CO2激光器作为主振荡器.
- 实施了使用折叠波导CO2放大器的三级放大配置.
- 采用闭环腔长度调节来调节频率.
主要成果:
- 在纵向模式间隔内实现了0.29 GHz的连续调范围.
- 在9.56μm (9P(20) 线上获得了23.7W的最大输出功率.
- 通过三台七通道放大器证明了17的放大因子.
- 测量了3.9MHz的激光线宽.
结论:
- 开发的激光系统具有高度的频率调节性,并以单一的纵向模式运行.
- 该系统具有显著的输出功率和放大功率,适合苛刻的应用.
- 这种RF激发波导CO2激光MOPA系统是连贯检测激光器的有希望的候选者.
相关概念视频
01:17NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
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.
01:22Muscle Stimulation Frequency
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...