Substrate-free Miniaturized Coarse Wavelength Division Multiplexing Filters

Abstract

To unlock the benefits of thin-film filters, produced by means of ion beam sputtering, for compact, hybrid integrated optical systems, we have implemented a sacrificial-substrate approach to create high-precision, miniaturized, substrate-free filters.

Substrate-free miniaturized thin-film filters for single-element coarse wavelength division multiplexing fibers

“…Acknowledgment. Portions of this work were presented at the Optical Interference Coatings Conference in 2022, paper MD.5 [24]. The authors thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for funding this work under Germany's Excellence Strategy within the Cluster of Excellence PhoenixD.…”