[25p-D214-1~17] 3.10 Optical quantum physics and technologies

[25p-D214-12] A new fiber-based low optical loss polarization control method for quantum information processing using squeezed light

〇Tomohiro Nakamura¹, Takahiro Kashiwazaki², Takeshi Umeki², Jun-ichi Yoshikawa¹, Akira Furusawa¹ (1.The Univ. of Tokyo, 2.NTT Device Technology Labs.)

Keywords:polarization, optical loss, squeezed light

In order to use squeezed light in a fiber-based experimental system, it is necessary to have a low optical loss optical element and to maintain high visibility at the interference point by controlling the polarization in the fiber. Therefore, we devised a low optical loss polarization control method. In this method, light whose polarization plane is shifted from the polarization-maintaining axis of the polarization-maintaining is injected into the fiber. And this fiber is stretched by a fiber stretcher and the polarization is rotated. This method enables polarization control with an optical loss of 0.5%