Red laser module is a kind of equipment that can emit laser. According to operating medium, red laser module can be divided into gas red laser module, solid red laser module, semiconductor red laser module and dye red There are four types of optical laser modules. Recently, free electron red laser modules have been developed. High-power red laser modules generally have pulsed output.
The operating principle of the red laser module
Except for the free electron red laser module, the basic operating principles of the various red laser modules are the same. The indispensable conditions for the occurrence of laser are population inversion and gain greater than loss, so the indispensable components in the device are the encouragement (or pumping) source and the working medium with metastable energy level. Encouragement means that the working medium absorbs external energy and then stimulates it to an agitated state, in order to complete and maintain the conditions for the population inversion invention. Encouraging methods include optical inspiring, electric inspiring, chemical inspiring, and nuclear energy inspiring. Deep UV LED
The working medium has a metastable energy level to make the stimulated radiation dominate, and then complete the light expansion. The common component in the red laser module is the resonant cavity, but the resonant cavity (see optical resonant cavity) is not an indispensable component. The resonant cavity can make the photons in the cavity have the same frequency, phase and working direction Then make the laser have excellent directivity and coherence. Moreover, it can shorten the length of the work material well, and can also schedule the laser generated by changing the length of the resonant cavity (ie mode selection), so the general red laser module has a resonant cavity.
