Wavelength Division Multiplexing in the Mid-Infrared via Fluoride Optical Fibers

Research interest in mid-infrared wavelengths is increasing due to its broad applicability in optical spectroscopy, chemical detection, thermal imaging, medicine, and light generation [1], [2]. However, progress in mid-infrared fiber-based laser technology remains limited due to the absence of essential commercially available components that are widely accessible in silica-based optical fiber systems [3], [4].