Patent ID: 9337607
Filing Date: 2016-05-10
CPC Classification: H01S

Claim Text:
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 comprising a protruding nanostructure located at the center of the total reflective mirror, wherein the at least one microstructure protrudes from the first reflective surface, the at least one microstructure and the body are made of a same material and formed as one piece, and the at least one microstructure protrude is coated by the metal film; 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, wherein the metal film is opposite to the discharge lamp, and there is no element between the metal film and the discharge lamp; and an active laser medium; wherein 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, and the laser has a working wavelength λ, a height of the at least one microstructure is 0.5λ, a lateral size of the at least one microstructure is 0.5λ.