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Supercontinuum Generation in the Cladding Modes of an Endlessly Single-Mode Fiber

1
Faculty of Physical Engineering/Computer Sciences, University of Applied Sciences Zwickau, Zwickau D-08056, Germany
2
Fraunhofer Application Center for Optical Metrology and Surface Technologies AZOM, Fraunhofer Institute for Material and Beam Technology IWS, Dresden D-01277, Germany
3
Faculty of Mechanical Science and Engineering, Institute of Manufacturing Technology, Technische Universität Dresden, Dresden D-01062, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(20), 4428; https://doi.org/10.3390/app9204428
Received: 3 September 2019 / Revised: 7 October 2019 / Accepted: 14 October 2019 / Published: 18 October 2019
(This article belongs to the Special Issue Future Optical Waveguides)
In photonic crystal fibers, light guidance can be achieved by a central defect of a periodic structure of air holes in a silica glass matrix and the dispersion can be adjusted over a wide spectral range to enhance nonlinear effects. By coupling short pulse laser radiation into the core with tight confinement and utilizing the nonlinear properties of glass, this radiation can be converted to a broad spectral distribution. The tight confinement puts limits on the maximum pulse fluence propagating in the core due to the damage threshold of the glass. Therefore, when higher power spectral densities are desired, it is favorable to spread the generation of light over a much larger area to prevent fiber damage. We present here a method for generating a supercontinuum using the cladding modes of an endlessly single-mode fiber. These modes generate a supercontinuum utilizing a multimodal quasi-continuum of states, for which dispersion is governed by the guiding properties of the material between the air-filled holes in the cladding. The system also provides experimental access to unique phenomena in nonlinear optics. Simulations of the propagation properties of the core mode and cladding modes were compared with measurements of the group-velocity dispersion in a modified white-light Mach–Zehnder interferometer. The coupling of similar laser parameters into the cladding of the photonic crystal fiber enables a significant increase in conversion efficiency in the visible spectral range compared with the core-pumped case. View Full-Text
Keywords: photonic crystal fiber; supercontinuum; cladding modes; endlessly single-mode fiber photonic crystal fiber; supercontinuum; cladding modes; endlessly single-mode fiber
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MDPI and ACS Style

Baselt, T.; Nelsen, B.; Lasagni, A.F.; Hartmann, P. Supercontinuum Generation in the Cladding Modes of an Endlessly Single-Mode Fiber. Appl. Sci. 2019, 9, 4428. https://doi.org/10.3390/app9204428

AMA Style

Baselt T, Nelsen B, Lasagni AF, Hartmann P. Supercontinuum Generation in the Cladding Modes of an Endlessly Single-Mode Fiber. Applied Sciences. 2019; 9(20):4428. https://doi.org/10.3390/app9204428

Chicago/Turabian Style

Baselt, Tobias; Nelsen, Bryan; Lasagni, Andrés F.; Hartmann, Peter. 2019. "Supercontinuum Generation in the Cladding Modes of an Endlessly Single-Mode Fiber" Appl. Sci. 9, no. 20: 4428. https://doi.org/10.3390/app9204428

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