Twisted Few-Mode Optical Fiber with Improved Height of Quasi-Step Refractive Index Profile. - Anton V. Bourdine; Vladimir V. Demidov; Artem Kuznetsov; Alexander A. Vasilets; Egishe V. Ter-Nersesyants; Alexander V. Khokhlov; Alexandra S. Matrosova; Grigori A. Pchelkin; Michael V. Dashkov; Elena S. Zaitseva; Azat R. Gizatulin; Ivan Meshkov; et al. (Sensors, 2022)