Fiber-optic communication exploits the properties of solitons.
Tips
memory
孤立 (isolated/solitary) + 子 (particle/-on suffix) — a calque mirroring English 'solit-on,' where -on flags it as a quasi-particle. 子 plays the same -on role in 光子 (photon), 电子 (electron), 中子 (neutron).