Multi-order dispersion engineering in binary multi-clad microstructured fiber towards designing nonlinear devices Sudip K. Chatterjee 1 • Saba N. Khan 1 • Partha Roy Chaudhuri 1 Received: 5 August 2015 / Accepted: 16 December 2015 Ó Springer Science+Business Media New York 2016 Abstract We report here a detailed investigation of multi-order dispersion engineering in soft-glass (SF6/SF57/LLF1) based binary multi-clad microstructured fiber (BMMF) in designing nonlinear fiber devices. A full-vector modal analysis is devised to obtain all six field components of the guided mode in order to procure the exact propagation charac- teristics in an N-layered fiber structure. Investigations for these SF6/LLF1 based BMMF reveal the presence of significant longitudinal field, typical electric field discontinuity and feeble ellipticity in the dominant magnetic field. Subsequently, we analysed in details the dependence of dispersion characteristics on the associated structural parameters. It is seen that the transverse design parameters (core-diameter, pitch and the low-index filling fraction) can be used as a key to widely tune the zero-dispersion-wavelength (ZDW). Various interesting dispersion profiles from the point of view of nonlinear application, namely, ultra-flat dispersion, all-normal dispersion, two-zero-dispersion, three-zero-dis- persion are extracted by modifying the geometry. We then discuss an advanced aspect of dispersion engineering that involves minute control over the individual higher-order dis- persion parameters. It is observed that this novel structure can yield fine-tuning of HOD’s while keeping the ZDW/maximum dispersion wavelength fixed at the desired operating wavelength. We mark our achievement in demonstrating an incredible control of This article is part of the Topical Collection on Optical Wave & Waveguide Theory and Numerical Modelling, OWTNM’ 15. Guest edited by Arti Agrawal, B.M.A. Rahman, Tong Sun, Gregory Wurtz, Anibal Fernandez and James R. Taylor. & Partha Roy Chaudhuri roycp@phy.iitkgp.ernet.in Sudip K. Chatterjee skc@phy.iitkgp.ernet.in 1 Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, India 123 Opt Quant Electron (2016)48:112 DOI 10.1007/s11082-015-0350-8