Prism combination for ring resonator, has catheter surfaces and hypotenuse surfaces serving as reflecting surfaces, which are located such that polarization with respect to plane is rotated around ninety degree

摘要

The combination (310) has catheter surfaces (317, 318) and hypotenuse surfaces serving as reflecting surfaces arranged in such a manner that planes stand perpendicular or parallel to a vector of an electrical field of a linear polarized laser beam in a uniform manner. The reflecting surfaces are located in such a manner that polarization with respect to the plane is rotated around ninety degree. An entrance surface and an exit surface of the combination are formed in such a manner that the laser beam can enter and exit in a perpendicular manner.