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AA-M显微镜扫描自相关仪
特点:
20 fs-12 ps脉宽范围
外接和内置光电探测器
扫描频率,0.1-20 Hz
线性畸变:<1 %
USB接口和软件
全反射光学元件
位置测量
条纹分辨自相关函数
无摩擦运动
旁路功能
AA-M提供两个同时测量点:一个位于显微镜焦平面上,另一个位于仪器的光学头位置,比如,显微镜输入之前。测量的这两个脉宽值进行对比决定了显微镜光学元件色散带来的脉冲展宽。显微镜中超短脉冲的大多数应用是表征显微镜焦点处光束的时间和空间轮廓。这些测量结果对任何实验都很重要,脉冲越短,非线性成像过程(双光子激发)的效率越高,实验成功需要的激发能量越少。在决定样品曝光时需要光束参数表征,确保图像好和正确的强度水平,因为错误的值可能会导致样品损坏。
仪器使用USB接口,可以连接Windows操作系统的计算机。提供多种软件工具。采集的脉宽数据可视化,可存储或导出txt或dat文件。可以计算并实时显示自相关函数和*终FWHM飞秒脉宽。而且,可以高斯或双曲线拟合,也可查看强度函数。统计分析功能可以对几个单独的脉冲测量结果进行对比。
AA-M | |
Possible full wavelength range* | 450-2000 nm |
Subranges*(exchangeable photodetectors/beam splitter sets) | V**: 450-700 nm R1: 700-1300 nm R2: 1300-2000 nm |
Input pulse duration range | 20 fs -12 ps |
Number of photodetectors for one range | two (internal and external for sample position) |
Input pulse repetition rate | >10 kHz |
Typical sensitivity (Pav*Ppeak) | 100 mW2 |
Input polarization | linear, horizontal (vertical upon request) |
Scan rate | 0.1-20 Hz |
Linear distortion | <1% |
Collinear (interferometric and intensity) autocorrelation | yes |
PC connection | USB, Windows PC acquisition and analysis software is included in the standard package |
Necessary equipment | Windows PC platform or an oscilloscope |
Signal source and detector | Two-photon conductivity in semiconductor |
Dimensions | 210x164x132 mm (optical unit) 225x190x45 mm (control unit) 70х55х16.5 mm (external photodetector) |
* - the autocorrelator may cover one, two or all three subranges with exchangeable photodetectors/beam splitter sets (1, 2 or all 3 sets may be included in the package depending on required laser source specifications); ** - the 450-700 nm subrange may only be purchased with the main unit order. |
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