Tapered chalcogenide-tellurite hybrid microstructured fiber for mid-infrared supercontinuum generation

Fibers exhibiting flattened and decreasing dispersion are important in nonlinear applications. Such fibers are difficult to design, particularly in soft glass. In this work, we develop a preliminary design of a highly nonlinear tapered hybrid microstructured optical fiber (TH-MOF) with chalcogenide...

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Bibliographic Details
Published in:Journal of modern optics 2015-05, Vol.62 (9), p.729-737
Main Authors: Yang, Peilong, Zhang, Peiqing, Dai, Shixun, Wu, Yuehao, Wang, Xunsi, Tao, Guangming, Nie, Qiuhua
Format: Article
Language:English
Subjects:
Cladding
Dispersion
dispersion decreasing
Dispersions
Fiber optics
Fibers
Glass
Mathematical analysis
Mathematical models
Microstructure
microstructured fiber
mid-infrared supercontinuum
Noise levels
Nonlinearity
Optical properties
soft-glass
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Summary:Fibers exhibiting flattened and decreasing dispersion are important in nonlinear applications. Such fibers are difficult to design, particularly in soft glass. In this work, we develop a preliminary design of a highly nonlinear tapered hybrid microstructured optical fiber (TH-MOF) with chalcogenide glass core and tellurite glass microstructure cladding. We then numerically studied its dispersion, loss, and nonlinearity-related optical properties under fundamental mode systematically using the infinitesimal method. The designed TH-MOF exhibits low chromatic dispersion that is similar to a convex function with two zero-dispersion wavelengths and decreases with fiber length from 2 to 5 μm band. The potential use of the TH-MOF in nonlinear applications is demonstrated numerically by a supercontinuum spectrum of 20 dB bandwidth covering 1.96-4.76 μm generated in 2-cm-long TH-MOF using near 3.25-μm fs-laser pump.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2015.1004376