3D printing ANDi fiber Research & information: general chalcogenide glasses dispersion management dispersive wave fiber gas laser fiber lasers gas lasers hollow core fiber hollow-core fiber hollow-core photonic crystal fiber hollow-core photonic crystal fibers liquid-filled PCF mid-infrared beam delivery mid-infrared fibers optical waveguide design photoionization photonic bandgap fiber photonic crystal fiber photonic crystal fibers polarization modulation instability resonance soliton stimulated Raman scattering supercontinuum generation