| 摘要 |
<p>1. Device permitting the expansion of the pulses of a laser, comprising a ring (20) contained within an amplifying space, this ring being formed by a semi-reflecting mirror (M4) receiving a pulse originating from an oscillator laser (10) and three other mirrors (M1, M2, M3), the transit time Tp of the pulse within the ring being less than or equal to the duration Te of a pulse originating from the oscillator laser (10), this ring being excited to be amplifying during a duration t which is very much greater than Te, this device being characterized in that the path of the light within the ring is plane, in that two of the mirrors (M2, M3) are constituted by a trirectangular trihedron (33), and in that it comprises a birefringent element (60), located within the ring, this ring delivering an amplified and expanded single pulse of duration Ts substantilly equal to t.</p> |
