LASER

摘要

A laser includes a total reflective mirror, an output mirror, a discharge lamp, and an active laser medium. The total reflective mirror, the output mirror, and the discharge lamp define a resonant cavity. The active laser medium is filled in the resonant cavity. The total reflective mirror includes a body, a metal film, and at least one microstructure. Each of the at least one microstructure is a step structure. The step structure includes a plurality of cylinders stacked with each other with respect to their diameters. Both the height and the diameter of the cylinders are in a range from about 0.5λ to about 2λ, while λ is a working wavelength of the laser.

主权项

1. A laser comprising:
a total reflective mirror comprising a body defining a first reflective surface, a metal film coated on the first reflective surface, and at least one microstructure; wherein each of the at least one microstructure comprises a plurality of cylinders having different diameters, the plurality of cylinders are stacked with each other in series with respect to the diameters; an output mirror, a discharge lamp, wherein the total reflective mirror and the output mirror are located on two opposite ends of the discharge lamp; and an active laser medium; wherein the total reflective mirror, the output mirror, and the discharge lamp define a resonant cavity, and the active laser medium is filled in the resonant cavity.