| 摘要 |
An optical amplifier comprises amplifying regions in an amplifying medium (1); a birefringent beam displacer (2); and an element (34) for changing the polarization. At least one part of the radiation emitted by one amplifying region is coupled in the other amplifying regions. Preferred Features: The amplifier has two amplifying regions using a birefringent mirror. The amplifying medium is a solid medium, preferably made from Nd:YVO4; Nd; YAG, Nd: YLF or Yb: YAG, a semiconductor based on AlGaAs with a quantum well, or a polymer.
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