Bowlan Pamela, Trebino Rick
Swamp Optics LLC, Atlanta, GA 30339-2919, USA.
Opt Express. 2011 Jan 17;19(2):1367-77. doi: 10.1364/OE.19.001367.
For essentially all applications, laser pulses must avoid variations in their intensity and phase within a pulse and from pulse to pulse. Currently available devices work very well for both long (>10ns) and short (<100ps) pulses. But intermediate (~ns) pulses remain difficult to measure and, not surprisingly, are the least stable. Here we describe a simple, elegant, complete, all-optical, single-shot device that measures ~ns pulses and that does not require a reference pulse or assumptions about the pulse shape. It simultaneously achieves a very high spectral resolution of <1pm and a very large delay range of ~10ns (several meters of light travel). It accomplishes both goals using high-efficiency, high-finesse etalons: one to generate high angular dispersion for a high-resolution spectrometer, and another to tilt the pulse front by ~89.9° without distorting it in time. Using this device, we completely measure microchip and fiber-amplifier pulses.
对于几乎所有应用而言，激光脉冲必须避免在单个脉冲内以及脉冲之间出现强度和相位变化。目前可用的设备对于长脉冲（>10ns）和短脉冲（<100ps）都能很好地工作。但中等长度（ns）的脉冲仍然难以测量，不出所料，其稳定性也是最差的。在此，我们描述了一种简单、精巧、完整的全光学单次测量设备，它可测量ns脉冲，且无需参考脉冲或对脉冲形状进行假设。它同时实现了<1pm的超高光谱分辨率和约10ns的超大延迟范围（光传播路径达数米）。它通过高效、高精细度的标准具实现了这两个目标：一个用于为高分辨率光谱仪产生高角色散，另一个用于使脉冲前沿倾斜约89.9°，同时不会在时间上使其失真。使用该设备，我们完整地测量了微芯片和光纤放大器脉冲。
