Abstract
In this paper, the different spot phenomena of high-order laser cavity under wire interference diffraction are verified experimentally. Firstly, we customize an external cavity He-Ne laser tube which can directly generate high-order Gaussian beams with various modes, good beam stability and outstanding quality. This device is easy to operate and easy to implement. We have done some research on this laser cavity. On this basis, we use a wire with a diameter of 0.15 mm to deform and then interfere with the beam, and use a CMOS camera to collect the diffraction pattern of the beam. Finally, the induction and summary of the experimental phenomena under different steel wires are carried out, and the change process of high-order Gaussian beams is recorded in detail, which provides an experimental precedent for future research.
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