[11a-N106-1~10] 3.8 Optical measurement, instrumentation, and sensor

[11a-N106-9] Measurement of dynamic fluctuation characteristics of optical fiber local birefringence using coherent heterodyne detection

〇Nanako Takei¹, Shiro Ryu¹ (1.Meiji Univ.)

Keywords:Rayleigh backscattered light, coherent heterodyne detection, local birefringence

We have proposed a method for measuring the fiber spatial distribution of optical fiber birefringence by detecting the in-phase (I) and orthogonal (Q) components of Rayleigh backscattered light by coherent heterodyne detection, and conducted experimental verification. In this paper, we report the results of successful measurement of the local birefringence fluctuation caused by the dynamic birefringence fluctuation generated at a specific point on the optical fiber.