Microstructured fiber cladding light stripper for kilowatt-class laser systems

An all-glass microstructured high-power cladding mode stripper capable of handling cladding light of up to a power of approximately 350 W with stripping efficiencies >22 dB is presented. An optimized graded structure pattern increased the device's reliability and its power-handling capabilities. Subjected to a 500 h stress test, the device shows no degradation.