title: Detailed comparison between mode couplings along multi-core fibers and structural irregularities using a synchronous multi-channel OTDR system with a high dynamic range.
abstract: We have greatly increased the dynamic range of a synchronous multi-channel OTDR system for the mode coupling measurement of a multi-core fiber (MCF) by more than 20 dB by introducing an optical amplifier and an optical masking apparatus. We used the OTDR system to measure the mode coupling along 10 km-long MCFs with low crosstalks of less than -50 dB. Thus, we successfully measured the fiber structural irregularity dependence of mode coupling along the MCF.
authors: Masato
authors: M
authors: Yoshida
authors: Toshihiko
authors: T
authors: Hirooka
authors: Masataka
authors: M
authors: Nakazawa
authors: Katsunori
authors: K
authors: Imamura
authors: Ryuichi
authors: R
authors: Sugizaki
authors: Takeshi
authors: T
authors: Yagi