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High-power short-wavelength infrared supercontinuum generation in multimode fluoride fiber

Zahra Eslami, Piotr Ryczkowski, Caroline Amiot, Lauri Salmela, and Goery Genty

Open Access Open Access

Abstract

We demonstrate the generation of octave-spanning supercontinuum generation from 1200 nm to over 2500 nm with 600 mW average power in a short length of multimode fluoride fiber with 100 μm core diameter. We perform a detailed study of the supercontinuum generation process as a function of the pump wavelength and for two different fiber lengths. Beam profile characterization at the fiber output in different wavelength bands is also carried out. Our results open up new possibilities for the generation of high-power supercontinuum sources from the near- to mid-infrared.

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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Figures (7)
Fig. 1.
Fig. 1. Experimental setup for SC generation in the 100 μm core multimode fluoride (MMF) fiber. OPA: optical parametric amplifier.

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Fig. 2.
Fig. 2. Attenuation of the 100 μm core multimode InF 3 fiber used in this work.

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Fig. 3.
Fig. 3. Numerically simulated (a) dispersion and (b) spatial intensity profiles of fundamental and selected linearly polarized (LP) higher-order modes of the multimode InF 3 fiber. Indices indicate the mode order. The vertical solid black lines mark zero-dispersion wavelength of each mode.

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Fig. 4.
Fig. 4. (a) SC spectrum generated in 1 m (blue) and 2 m (black) of InF 3 multimode fiber with 100 μm core for a pump wavelength at 1600 nm. The dashed line marks the spectral limit of the OSA. (b) Corresponding beam profiles at the output of the 2 m long fiber at different wavelengths as indicated (with bandwidth of 10 nm in each case). Numbers on the spatial intensity profiles represent the factor by which the SC signal was amplified.

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Fig. 5.
Fig. 5. (a) SC spectrum generated in 1 m (blue) and 2 m (black) of InF 3 multimode fiber with 100 μm core for a pump wavelength at 1700 nm. The dashed line marks the spectral limit of the OSA. (b) Corresponding beam profiles at the output of the 2 m long fiber at different wavelengths as indicated (with bandwidth of 10 nm in each case). Numbers on the spatial intensity profiles represent the factor by which the SC signal was amplified.

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Fig. 6.
Fig. 6. (a) SC spectrum generated in 1 m (blue) and 2 m (black) of InF 3 multimode fiber with 100 μm core for a pump wavelength at 1960 nm. The dashed line marks the spectral limit of the OSA. (b) Corresponding beam profiles at the output of the 2 m long fiber at different wavelengths as indicated (with bandwidth of 10 nm in each case). Numbers on the spatial intensity profiles represent the factor by which the SC signal was amplified.

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Fig. 7.
Fig. 7. (a) SC spectrum generated in 1 m (blue) and 2 m (black) of InF 3 multimode fiber with 100 μm core for a pump wavelength at 2080 nm. The dashed line marks the spectral limit of the OSA. (b) Corresponding beam profiles at the output of the 2 m long fiber at different wavelengths as indicated (with bandwidth of 10 nm in each case). Numbers on the spatial intensity profiles represent the factor by which the SC signal was amplified.

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Tables (1)

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Table 1. Optical Properties of Different Soft Glasses and Silica Glasses a

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