Presentation Information
[B-10A_B-13-09]Thermal behavior of the bending region in MCF under high-power optical transmission
〇Rika Fukatsu1, Kenji Kurokawa2, Kouhei Omoto1, Takui Uematsu1, Nobutomo Hanzawa1, Takashi Matsui1, Kazuhide Nakajima1 (1. NTT, Inc., 2. Kitami Institute of Technology)
Keywords:
high power,bending region,multi-core fiber
In this study, we evaluated the temperature rise characteristics at the bending region of a multicore fiber (MCF) under high-power optical transmission. While MCF enables large-capacity transmission, there is concern about heat generation and potential damage to the coating caused by leakage light due to bending loss. In the experiment, optical power with a wavelength of 1.55 μm and up to 4 W was launched into a four-core MCF and a single-mode fiber (SMF), and the temperature rise was measured using thermography while controlling the bending loss. The results confirmed that the temperature rise increases almost linearly with the leakage optical power. Furthermore, the temperature rise in the MCF was smaller than that in the SMF, which is attributed to the spatial distribution of heat generation caused by leakage light from each core. These findings indicate that the temperature rise at the bending region of MCF depends on the leakage optical power and can be reduced due to its structural characteristics. Future work will focus on clarifying the effects of the number of cores and core arrangement.