Abstract
In this paper, the birefringence in an LD-side-pumped solid-state laser (LSPSSL) system isstudied by using a quasi plane-wave probe beam. The effects on birefringence compensationhave been investigated for different coupling systems arranged between two tandem-setrods. Both the aperture obstruction and the thermally induced lens effect have been takeninto consideration in the theoretical explanation. It is shown that most birefringencecan be successfully removed by using a suitable lens system as well as a quartz90° rotator. In construction of a real resonator, such performances as the birefringencecompensation, the extraction efficiency, and the high-order-mode control must be carefullybalanced at the same time. Although the conclusions are based on analyses of a one-waytravelling wave, the methodology introduced in this paper is thought to be useful for astationary-wave design of the laser oscillator.
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