Spectral Line-by-Line Pulse Shaping

谱线逐线脉冲整形Andrew Weiner，普渡大学0601692智力优点：锁模激光器产生超短脉冲的周期性序列，其特征在于在频域中由一系列均匀间隔的离散谱线。 最近，这种光学频率梳的稳定性已经导致了跨越射频到光学的频率之间的直接和精确的连接，并且导致了精密光学频率合成和计量学的巨大进步。 与此同时，利用光谱分量的频域操纵来合成用户指定的超短脉冲场的脉冲成形技术已经被开发并被广泛采用。 到目前为止，锁模激光器的频率稳定和这种激光器的频域操纵和成形一直被单独考虑。 因此，一个新的研究计划计划，其中高分辨率脉冲整形器解决和控制个别光谱线。 设想的研究包括逐行脉冲整形的调查，重点是逐行操作产生的新现象;适用于逐行脉冲整形的波形表征方法的演示;能够非常高分辨率的新型脉冲整形器几何形状的开发（GHz范围），同时缩放到数千条线路的操作;以及研究梳状光源，该梳状光源提供更多的谱线，同时在适合应用的参数范围内保持良好的光学频率稳定性更广泛的影响：计划中的对单个谱线操纵的研究预计将导致超快光学领域的一个全新领域，其中脉冲整形和稳定频率梳的属性和优点可以首次同时实现和利用。 光脉冲整形技术和飞秒频率梳技术各自都产生了巨大的影响。 将它们结合起来，应该会在安全光通信、雷达和无线通信的超宽带电波生成、化学反应和量子力学运动的相干控制、单周期脉冲生成和光谱学等领域带来新的机会。 由于这些技术正在广泛启用，因此可能还会出现尚未预料到的其他应用程序。 该项目还应提供丰富的机会，广泛的学生培训领域的尖端技术，在一个领先的研究小组，其卓越的研究生培训的气氛是通过学生奖的强有力的记录证明。 两个博士学生被列入预算案。 这些学生将有机会设计，实施和测试新颖的光脉冲整形和频率梳模块，并进行整合这些先进技术的实验，以及报告他们的研究结果，并在适当的会议场所与其他研究人员互动。

Spectral Line-by-Line Pulse ShapingAndrew Weiner, Purdue University0601692Intellectual Merit: Mode-locked lasers generate periodic trains of ultrashort pulses that are characterized in the frequency domain by an evenly spaced series of discrete spectral lines. Recently, the stabilization of such optical frequency combs has led to a direct and precise connection between frequencies spanning radio-frequency to optical and to enormous progress in precision optical frequency synthesis and metrology. In parallel, pulse shaping techniques that exploit frequency domain manipulation of optical spectral components for synthesis of user-specified ultrashort pulsed fields have been developed and widely adopted. Until now frequency stabilization of mode-locked lasers and frequency domain manipulation and shaping of such lasers have been considered separately. Therefore, a new research program is planned in which high resolution pulse shapers resolve and control individual spectral lines. The envisioned research includes investigation of pulse shaping in the line-by-line regime, with an emphasis on new phenomena arising from line-by-line manipulation; demonstration of waveform characterization methods appropriate for line-by-line pulse shaping; development of novel pulse shaper geometries capable of very high resolution (GHz range) while scaling to manipulation of thousands of lines; and investigation of comb sources providing increased numbers of spectral lines while maintaining good optical frequency stability in a parameter range suitable for applications in optical telecommunications.Broader Impacts: The planned research on manipulation of individual spectral lines is expected to lead to a fundamentally new regime in ultrafast optics in which the attributes and advantages of pulse shaping and of stabilized frequency combs can be simultaneously realized and exploited for the first time. Both optical pulse shaping and femtosecond frequency combs technologies have individually had tremendous impact. Combining them should result in new opportunities in areas such as secure optical communications, ultrawideband electrical waveform generation for radar and wireless communications, coherent control of chemical reactions and quantum mechanical motions, single cycle pulse generation, and spectroscopy. Because these technologies are broadly enabling, it is likely that additional applications as yet unanticipated will also emerge. This project should also provide rich opportunities for broad student training in areas of cutting-edge technology, within the atmosphere of a leading research group whose excellence in graduate student training is evidenced through a strong record of student awards. Two Ph.D. students are included in the proposal budget. These students will have the opportunity to design, implement, and test novel optical pulse shaping and frequency comb modules and perform experiments integrating these advanced technologies, as well as report their findings and interact with other researchers at appropriate conference venues.