For citations:
Bylina M., Gultyaeva L. Multi-Core Optical Fiber with Stepped Single-Mode Cores. Part 1. Insulation with Solid Clads. Proceedings of Telecommunication Universities. 2022;8(4):28-38. (In Russ.) https://doi.org/10.31854/1813-324X-2022-8-4-28-38