High-order mode evolution by disturbed laser resonant cavity with metal wire

This paper experimentally verifies various high-order mode evolution when a metal wire is placed in different positions of the beam in a high-order laser cavity. We have placed a metal wire (fixed on the lifting platform) on the beam in the customized high-order mode laser cavity, which can interfere with the beam and diffract, and collect the spot patterns with CMOS camera. We modulate high-order modes through the two factors of the wire modulation in the cavity because of the cavity mirror changing the gain medium. We get a variety of high-order modes and our modulation process is simple and operation easily. Different high-order modes contain different information capacities. They can be used in optical communication and other fields.

Automated summary

This paper experimentally verifies the influence of metal wire positioned in different locations within a high-order laser cavity on the evolution of high-order modes. Through modulating the metal wire, different high-order modes were achieved, offering a new application for fields such as optical communication.