Single-Mode Operation in Flat Fibers Slab Waveguide via Modal Leakage

Autor: Soo Yong Poh, Ghafour Amouzad Mahdiraji, Yong Meng Sua, Fatemeh Amirkhan, Din Chai Tee, Kwok Shien Yeo, Faisal Rafiq Mahamd Adikan
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: IEEE Photonics Journal, Vol 9, Iss 3, Pp 1-9 (2017)
Druh dokumentu: article
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2017.2690377
Popis: 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.
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