Supercontinuum generation in photonic crystal fibers infiltrated with tetrachloroethylene

Abstract

This study proposes a photonic crystal fiber made of fused silica glass, with the core infiltrated with tetrachloroethylene (C2Cl4) as a new source of supercontinuum (SC) spectrum. We studied numerically the guiding properties of the several different fiber structures in terms of characteristic dispersion, mode area, and attenuation of the fundamental mode. Based on the results, the structural geometries of three C2Cl4-core photonic crystal fibers were optimized in order to support the broadband SC generations. The first fiber structure with lattice constant 1.5 μm and filling factor 0.4 operates in all-normal dispersion. The SC with a broadened spectral bandwidth of 0.8–2 μm is generated by a pump pulse with a central wavelength of 1.56 μm, 90 fs duration and energy of 1.5 nJ. The second proposed structure, with lattice constant 4.0 μm and filling factor 0.45, performs an anomalous dispersion for wavelengths longer than 1.55 μm. With the same pump pulse as the first fiber, we obtained the coherence SC spectrum in an anomalous dispersion range with wavelength range from 1 to 2 μm. Meanwhile, the third selected fiber (lattice constant 1.5 μm, filling factor 0.55) has two zero dispersion wavelengths at 1.04 μm and 1.82 μm. The octave-spanning of the SC spectrum formed in this fiber was achieved in the wavelength range of 0.7–2.4 μm with an input pulse whose optical properties are 1.03 μm wavelength, 120 fs duration and energy of 2 nJ. Those fibers would be good candidates for all-fiber SC sources as cost-effective alternatives to glass core fibers.

Recent advances in supercontinuum generation in specialty optical fibers [Invited]

“…Table 2 further summarizes the characteristics of several ANDi SC sources reported in recent literature. For the realization of the different fiber designs, a wide range of instruments from the tool box of dispersion engineering in specialty optical fibers has been used, including air-hole microstructures [115,124,129,[134][135][136], microstructures combined with a highly germanium-doped core [137], the integration of different soft glasses into all-solid PCF designs [138], and selective infiltration of PCF holes with liquids [139]. Enabled by the high nonlinearity and transparency of chalcogenide glasses, the spectral coverage of ANDi SC sources has been extended far into the mid-IR to wavelengths up to 14 µm, e.g.…”

Recent Advances in Supercontinuum Generation in Specialty Fiber

“…Table 2 further summarizes the characteristics of several ANDi SC sources reported in recent literature. For the realization of the different fiber designs, a wide range of instruments from the tool box of dispersion engineering in specialty optical fibers has been used, including air-hole microstructures [106,112,116,121,126,127], microstructures combined with a highly germanium-doped core [128], the integration of different soft glasses into all-solid PCF designs [129], and selective infiltration of PCF holes with liquids [130]. Enabled by the high nonlinearity and transparency of chalcogenide glasses, the spectral coverage of ANDi SC sources has been extended far into the mid-IR to wavelengths up to 14 µm, e.g.…”

Recent advances in supercontinuum generation in specialty optical fibers [Invited]

“…Table 2 further summarizes the characteristics of several ANDi SC sources reported in recent literature. For the realization of the different fiber designs, a wide range of instruments from the tool box of dispersion engineering in specialty optical fibers has been used, including air-hole microstructures [115,124,129,[134][135][136], microstructures combined with a highly germanium-doped core [137], the integration of different soft glasses into all-solid PCF designs [138], and selective infiltration of PCF holes with liquids [139]. Enabled by the high nonlinearity and transparency of chalcogenide glasses, the spectral coverage of ANDi SC sources has been extended Experimental SC spectra at the output of the PM-ANDi PCF for average output power of 6 mW to 720 mW with an input beam polarized along the fiber fast axis.…”