| 摘要 |
<p>A laser system (100) includes a laser gain medium (114) and three reflectors (101, 102, 104). A first reflector and a second reflector spaced from the first reflector define a laser cavity (108) that contains the laser gain medium. Light reflected by the first reflector is amplified by the laser gain medium. A third reflector is spaced from the second reflector to define a resonant cavity (110) external to the laser cavity (108). Light passes from the laser cavity to resonate in the external resonant cavity. Part of light passes from the external resonant cavity (110) to the laser cavity (108). A light-screening device, , an aperture (115) is disposed between the second reflector and the gain medium to screen light reflected from the external cavity such that the light portion of constructive interference is preferentially passed over the light portion of destructive interference. This enables the gain medium to optically lock to the resonant frequency of the external cavity. <IMAGE></p> |
