In the field of burglar alarm, there are many popular perimeter protection technologies at present, such as vibrating cable, outdoor three-authentication probe, leaking cable, tension fence, electronic fence, infrared correlation and other technologies.

Diode-pumped solid-state laser is a new type of laser with the fastest development and wide application in the world in recent years. This type of laser uses a semiconductor laser with a fixed wavelength to replace the traditional krypton lamp or xenon lamp to pump the laser crystal, thus achieving a new development. The development of diode-pumped solid-state lasers is inseparable from the development of semiconductor lasers.