| 摘要 |
<p>An optical resonator comprising a substantially annular reflector (22) disposed about and generally facing a central axis and comprising at least one annular reflecting surface (22') a central rotationally symmetric reflector (23) positioned along said central axis and comprising at least one central reflecting surface (23'), and a rotationally symmetric power extraction cavity (55) located between the annular reflector (22) and the central reflector (23).</p> |
