
求助 毕业论文的一段英文翻译 很长的一段 拜托懂的人翻译下 真的很感谢 求高手帮助
These drawbacks can be overcome by using two synchronized lasers with slightly different but stabilized pulse repetition rates. This method obviating the need for a mechanical delay line is called Asynchronous Optical Sampling (ASOPS). A time resolution below 100 fs in a time measurement window of up to 10 ns can be reached. In the following we are going to explain and characterize this method and present applications and experimental results.
Menlo Systems, a leading developer and global supplier of instrumentation for high-precision metrology, was founded 2001 as spin-off of the Max-Planck-Institute of Quantum Optics. Known for the Nobel-Prize-winning Optical Frequency Comb technology, the Munich based company offers complete solutions based on ultrafast lasers and synchronization electronics for applications in industry and research. All our products are manufactured according to Lean Manufacturing standards. We think that Lean Production supports our strength in listening to the customer and manufacture in a fast and efficient way.
The invention of shorter and shorter laser pulses with pulse durations up to few femtoseconds (1 fs = 10-15 s) opened the possibility of measuring ultrafast dynamics of various samples on this time scale. In ultrafast time-resolved spectroscopy a reaction is triggered by a femtosecond laser pulse which is also called pump pulse. A second laser pulse, called probe pulse, is used to probe the change of sample properties (e.g. absorption, reflectivity, fluorescence, etc.). By shifting the arrival time of the probe pulse with respect to
the pump pulse the stimulated process can be followed in time [A. Zewail, Nobel lecture, 1999]. This way, the processes in the sample can be probed with a time resolution on the order of the duration of the laser pulses.
Typically, in a time-resolved pump-probe experiment both pump and probe pulse originate from the same laser by dividing every laser output pulse into two separate pulses. The probe pulse is delayed against the pump pulse with a mechanical delay line [see e.g. J-C. Diels, W.Rudolph, “Ultrashort Laser Pulse Phenomena”, Academic Press, Elsevier]. 展开
你的文章没有打完??前面还有??
……(前文)没有时间延迟。在飞秒泵浦探测实验中,一束超快的激光脉冲触发一个回馈反应,而第二段激光脉冲就记录下来这一反应。通过调节泵浦脉冲相应的探测脉冲的到达时间,刺激过程就能及时完成。通常,探测脉冲相比泵浦脉冲都会延后一个机械延迟式。虽然这种方法在过去几十年中已经被广泛使用,但是其还是存在明显的缺点。
这些缺点可以被克服,通过使用近似同步且稳定了脉冲重复率的两束激光。这种省去了机械延迟式的方法就是所谓的异步光采样(ASOPS)。10纳秒采样100次的精度可以达到了。接下来,我们将解释、表征这一方法,同时举出一些应用和实验结果的例子。门洛帕克系统,高精密计量仪器的领先开发商和全球供应商,2001年作为分拆的马克斯 - 普朗克量子光学研究所而成立。因有光频梳技术获诺贝尔奖而闻名,这家总部在慕尼黑的公司为超快激光器和电子同步在工业和研究中的应用提供了完整的解决方案。我们的所有产品都秉着精益求精的标准来加工。我们认为,产品精良、倾听顾客和快速有效的生产方式是相辅相成的。
脉冲续时越来越短的飞秒(一飞秒=十的负十五次方秒)激光使得测量这一时间尺度上的极快的动力学样本成为了可能。在极快时间分辨率的光谱分析中,回馈反应是由飞秒激光(又被叫做泵浦脉冲)来触发的。第二段激光,称作探测激光,是用来探测样本性质的变化(例如:吸收,反射,荧光等)的。通过调节泵浦脉冲相应的探测脉冲的到达时间,刺激过程就能及时完成。 [A. Zewail,诺贝尔讲座, 1999]以这种方式,样本中的过程就能以激光脉冲持续时间的时间分辨率被探测到。
通常,在飞秒泵浦探测实验中,泵浦脉冲和探测脉冲都是以把每个输出脉冲分成两个单独脉冲的方式从同一束激光中分离出来的。探测脉冲相比泵浦脉冲都会延后一个机械延迟式。 [见J-C. Diels, W.Rudolph,等的《超短激光脉冲现象》, 学术出版社, Elsevier]
完全手打好累啊……希望能够帮到你……楼上机翻,不解释……
=.=前面是题目 无视了 后面还有 谢谢亲 麻烦了 其实我感觉翻译的很好 后面还有 都不好意思问亲了。。。
采纳哟 亲!