Keaveney James
Joint Quantum Centre (JQC) Durham-Newcastle, Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom.
Rev Sci Instrum. 2018 Mar;89(3):035114. doi: 10.1063/1.5022973.
We present a simple and convenient, high-resolution solution for automated laser-beam profiling with axial translation. The device is based on a Raspberry Pi computer, 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 and 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.
我们提出了一种简单便捷、具有高分辨率的解决方案，用于通过轴向平移实现自动激光束轮廓测量。该设备基于树莓派计算机、Pi Noir CMOS相机、步进电机和商用平移台。我们还提供运行该设备的软件。CMOS传感器在300至1100纳米的大波长范围内敏感，并且可以沿光束轴平移超过25毫米。传感器头可以在不改变其轴向位置的情况下反转，从而能够定量估计与反向传播激光束的光束重叠情况。尽管该设备并不局限于这一应用，但它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。我们展示了一次此类测量的示例数据来说明设备性能。
