A. V. Bourdine, M. V. Dashkov, V. V. Demidov, A. S. Evtushenko, E. S. Zaitseva, G. A. Pchelkin, E. V. Ter-Nersesyants, K. V. Dukelskii, “Silica multicore microstructured optical fibers with induced twisting”, Kvantovaya Elektronika, 2024, Volume 54, Number 1,Pages <nobr>11

Fibre optics

Silica multicore microstructured optical fibers with induced twisting

A. V. Bourdine^abcd, M. V. Dashkov^a, V. V. Demidov^b, A. S. Evtushenko^a, E. S. Zaitseva^a, G. A. Pchelkin^bc, E. V. Ter-Nersesyants^b, K. V. Dukelskii^bce

^a Povolzhskiy State University of Telecommunications and Informatics, 443010, Samara, Russia
^b Research Institute of Optical Materials Technology, All-Russian Scientific Centre "S. I. Vavilov State Optical Institute", St. Petersburg
^c Bonch-Bruevich St. Petersburg State University of Telecommunications, 193232, St. Petersburg, Russia
^d OOO OptoFiber Lab, Skolkovo Innovation Center, 143026, Moscow, Russia
^e ITMO University, 197101, St. Petersburg, Russia

Abstract: We present a new class of optical fibers: silica chiral multicore microstructured optical fibers (MOFs) characterized by twisting induced during the drawing process and the use of supporting elements made of GeO₂-doped silica glass. Technological aspects of core preform manufacturing, as well as specific features of the implementation of drawing the lengths of twisted MOFs, are considered. The technical feasibility of the described complex fiber-optic structure is confirmed. Extended (50 m long) pilot samples of silica six-core MOFs with step- and graded-index profiles of the cores and different twisting degrees from 50 to 500 rpm are manufactured for the first time, and the results of measuring their basic characteristics are presented.

Keywords: multicore microstructured optical fibers, chiral microstructured optical fibers, microstructured optical fibers with induced twist, differential mode delay.

Received: 10.02.2024