| 摘要 |
A laser device and a method of pumping a laser gain medium (R) comprise directing pulses of laser light from a pump laser ( 10 ) to a series of separate locations ( 11, 12, 13, 14, 15, 16 and 17 ) arranged longitudinally along the gain medium (R) in the direction of laser propagation. Each pulse of laser light generates a population inversion in an associated portion of the gain medium (R) just ahead of the laser photons. The pulses from the pump laser ( 10 ) are transmitted by a splitter ( 18 ) to the series of separate locations by optical delay lines ( 11, 12, 13, 14, 15, 16 and 17 ) and each delay line is arranged to pump a different portion of the gain medium to cause a localised population inversion. The pulse transmission delays deliver a sequence of pulses to the portions of the gain medium (R) such that each portion will in turn contribute to amplification of a laser propagating within the gain medium (R).
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