一种低双折射光学偏振放大器的演示
Demonstration of an optical polarization magnifier with low birefringence
摘要：
在任何偏振测量技术中，在激光束到达分析器之前增强激光束的激光偏振变化可以帮助提高灵敏度。这可以使用具有大的线性二向色性的光学部件来执行，增强因子等于两个透射因子之比的平方根。一堆布儒斯特入射的平行板看起来适合于实现这样的偏振放大器。在本文中，我们解决的问题所提出的干涉板和板之间，影响测量引起的双折射。我们证明，楔形板提供了一个方便和有效的方法来避免这种干扰。我们已经实现了4和6楔形板在布鲁斯特入射，这导致了我们正在进行的奇偶违反测量的信噪比的决定性改善的设备和特点。
英文摘要：
In any polarimetric measurement technique, enhancing the laser polarization change of a laser beam before it reaches the analyzer can help in improving the sensitivity. This can be performed using an optical component having a large linear dichroism, the enhancement factor being equal to the square root of the ratio of the two transmission factors. A pile of parallel plates at Brewster incidence looks appropriate for realizing such a polarization magnifier. In this paper, we address the problem raised by the interference in the plates and between the plates, which affects the measurement by giving rise to birefringence. We demonstrate that wedged plates provide a convenient and efficient way to avoid this interference. We have implemented and characterized devices with 4 and 6 wedged plates at Brewster incidence which have led to a decisive improvement of the signal to noise ratio in our ongoing Parity Violation measurement.
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