Open AccessSingle-Mode Operation in Flat Fibers Slab Waveguide via Modal Leakage
Author(s) -
Soo Yong Poh,
Ghafour Amouzad Mahdiraji,
Yong Meng Sua,
Fatemeh Amirkhan,
Din Chai Tee,
Kwok Shien Yeo,
Faisal Rafiq Mahamd Adikan
Publication year - 2017
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2017.2690377
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
An approach to obtain single-mode operation on a semirectangular large core area Flat Fiber (FF) slab waveguide is proposed. A new design of FF with two defect eye holes is presented, and its single-mode guiding is analyzed by simulation. To validate the simulation results, a proof of concept FF with a core area >1200 μm2 was fabricated, and its modal behavior was examined. It was found that higher order propagation modes could be discriminated from the large core area by introducing a high-refractive index region in the FF eye holes. Experimental results confirmed a single Gaussian mode profile (mode field diameter of ≈745 μm) output of this large core FF, thus validating the simulation results.