| 摘要 |
<p>A pulsed laser system which has a reflecting mirror (M1) close up to one end of the discharge chamber (L) and another reflecting mirror (M2) for the other end of the discharge chamber which is spaced from the chamber so that the light pulse has to travel a distance to be reflected back to the chamber. This has the effect that the pulse is shortened. The mechanism is not fully understood but it is thought that either the pulse passes back through the chamber as the gain medium changes to absorption and, as a consequence, the trailing end of the pulse is attenuated or because the system prevents multiple peaks being formed in the pulse and the light pulse is short as a result.</p> |
