Single-Mode Multicore Fibers With Integrated Bragg Filters

Fiber Bragg gratings (FBGs) in single-mode fibers, used as narrowband filters, have reached a high maturity level, especially for applications in telecommunications and sensing. In spectroscopic applications, e.g., in Raman spectroscopy, FBG filters can be used to separate laser probing light from generated sensor light which simplifies Raman probes. For this purpose, light from a sample has to be...