| 摘要 |
PCT No. PCT/EP91/01296 Sec. 371 Date Apr. 6, 1993 Sec. 102(e) Date Apr. 6, 1993 PCT Filed Jul. 10, 1991 PCT Pub. No. WO92/07400 PCT Pub. Date Apr. 30, 1992.A diode-pumped solid state laser for single-mode operation contains a resonator with an input mirror and an output mirror between which an active laser medium, a polarizer and a birefringent crystal are disposed. The crystal is disposed with its optical axes in such a way that the latter form an angle of 45 DEG to the polarizing direction produced by the polarizer. The losses for the ordinary and extraordinary rays are adjusted to be substantially equal. A temperature control means is used to keep the temperature of the birefringent crystal at a constant value so that the refractive indices and the length of the crystal do not change.
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