用于现场测量laser束斑尺寸和焦点位置的自动平移光束轮廓仪
Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements
摘要：
我们提出了一种低成本，高分辨率的解决方案，自动激光束轮廓与轴向平移。该设备基于Raspberry Pi，Pi Noir CMOS相机，步进电机和商业平移台。我们还提供运行该设备的软件。CMOS传感器在300-1100 nm之间的大波长范围内敏感，并且可以沿着光束轴平移25 mm。传感器头可以在不改变其轴向位置的情况下反转，从而允许定量估计与反向传播的激光束的光束重叠。虽然不限于此应用，但该器械的预期用途是自动测量高斯激光束的焦点位置和光斑尺寸。我们提出一个这样的测量的示例数据来说明设备性能。
英文摘要：
We present a low-cost, high-resolution solution for automated laser-beam profiling with axial translation. The device is based on a Raspberry Pi, Pi Noir CMOS camera, stepper motor and commercial translation stage. We also provide software to run the device. The CMOS sensor is sensitive over a large wavelength range between 300-1100 nm, and can be translated over 25 mm along the beam axis. The sensor head can be reversed without changing its axial position, allowing for a quantitative estimate of beam overlap with counter-propagating laser beams. Although not limited to this application, the intended use for this device is the automated measurement of the focal position and spot-size of a Gaussian laser beam. We present example data of one such measurement to illustrate device performance.
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