Experimental measurement and numerical analysis of group velocity dispersion in cladding modes of an endlessly single-mode photonic crystal fiber

Baselt, Tobias; Taudt, Christopher; Nelsen, Bryan; Lasagni, Andrés Fabían; Hartmann, Péter

doi:10.1117/12.2270183

Cited by 2 publications

(4 citation statements)

References 14 publications

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“…The group-velocity dispersion (GVD) of different modes was experimentally measured using a Mach-Zehnder interferometer with a controllable delay line to investigate the time delay and find the equalization wavelength for different modes (Figure 1) [12,15]. A camera at the free output of the second polarization-independent beam splitter allowed control over the near field pattern of the analyzed guided modes.…”

Section: Characterization Of Group-velocity Dispersionmentioning

confidence: 99%

“…The interferometric setup used for measuring the group-velocity dispersion (GVD), similar to that used in Ref. [12]. SC, supercontinuum light source; BS, nonpolarizing beam splitter; DL, delay line; M, mirror; TF, test fiber; AT, attenuator; F, bandpass filter; L, lens; CCD, camera; and Spec, spectrometer.…”

Section: Characterization Of Group-velocity Dispersionmentioning

confidence: 99%

“…These modes, which are guided outside of the core, are known as ESF cladding modes. A study of these cladding modes [12] indicated that their dispersion characteristics are well suited to SC generation, while also maintaining a large cross-sectional area. These cladding modes provide coupling of radiation between individual cladding modes because of similarly tailored dispersion properties.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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.

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Section: Characterization Of Group-velocity Dispersionmentioning

confidence: 99%

Section: Characterization Of Group-velocity Dispersionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…In addition to light guided in the core of PCFs, light can also be guided in the microstructured cladding [8,9]. The so-called cladding modes of PCFs enable dispersion characteristics that are well suited for SC generation due to the zero-dispersion wavelength and dispersion profile [10]. These cladding modes have low mode dispersion and similar dispersion patterns, which allows for the coupling of radiation between each cladding mode.…”

Section: Introductionmentioning

confidence: 99%

Spectrally resolved temporal coherence of spectrally narrowband filtered high-power supercontinuum light source versus an appropriately treated laser-driven plasma light source

Baselt

Ruf

Taudt

et al. 2023

Optical Components and Materials XX

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For interferometric measurement methods such as optical white light interferometry, the coherence length of the implemented broadband light source is of central importance in order to realize a high axial resolution as well as a large dynamic range of the measurement system. In the case the broadband light sources are spectrally resolved by a spectral dispersive element, the spatial coherence and emission duration define primarily the coherence of the light source when no stimulated emission occurs. Broadband light sources with a high brilliance, such as supercontinuum and laser-driven plasma light sources, are particularly interesting for interferometric measurement methods because of their high spectral width and beam quality with enormous spectral power density. Especially for interferometric measurements, the coherence of the light source is essential. In the scope of the investigations, the coherence length and spectral power density of highpower supercontinuum light source based on a Yb-doped photonic crystal fiber in a nonlinear fiber amplifier setup and a commercially available laser-driven plasma light source were comparatively investigated with conventional white light sources. It was shown that the investigated high-power supercontinuum light source can be used very well for interferometric investigations. Furthermore, the achieved spectral pulse peak power densities exceed the laser-driven plasma light sources by a factor of one million.

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Experimental measurement and numerical analysis of group velocity dispersion in cladding modes of an endlessly single-mode photonic crystal fiber

Cited by 2 publications

References 14 publications

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

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

Spectrally resolved temporal coherence of spectrally narrowband filtered high-power supercontinuum light source versus an appropriately treated laser-driven plasma light source

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