Robust Mode Matching between Structurally Dissimilar Optical Fiber Waveguides

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

36 Scopus Citations
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Detail(s)

Original languageEnglish
Pages (from-to)857-863
Journal / PublicationACS Photonics
Volume8
Issue number3
Online published10 Feb 2021
Publication statusPublished - 17 Mar 2021

Abstract

Robust low-loss optical fiber joints are a prerequisite in all-fiber devices. Joining structurally dissimilar fibers, such as microstructured optical fibers, is a timely challenge, as they are becoming important building blocks in photonics. In this paper we have revealed the mechanism of robust mode matching and demonstrated ultralow loss and high strength fusion splices between ultralarge mode-area photonic crystal fibers (ULMA-PCFs) and standard single mode fibers (SMFs) without using any intermediate bridging elements. To provide precise matching in both the mode field distribution and the cladding size between an SMF and an ULMA-PCF, we develop a two-step reverse tapering approach, involving reverse tapering an SMF and thermally expanding its core, where the fundamental mode can be adiabatically transferred and reach the optimized mode shape in the tailored reverse-taper. Using our new tapering approach, we achieve a record-low splice loss of 0.23 dB, regardless of the transmission direction, together with a mechanical strength an order of magnitude higher than that of a conventional sharp-edge joint. Our approach provides an effective way to overcome the splicing challenge for ultralarge mode specialty fibers and thus greatly facilitates the development of components and devices with such fibers.

Research Area(s)

  • mode matching, ultralarge mode area, photonic crystal fibers, specialty fibers, optical coupling

Citation Format(s)

Robust Mode Matching between Structurally Dissimilar Optical Fiber Waveguides. / Yu, Ruowei; Wang, Caoyuan; Benabid, Fetah et al.
In: ACS Photonics, Vol. 8, No. 3, 17.03.2021, p. 857-863.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review