Stripping of cladding light at different angles : theoretical and experimental studies

In fiber lasers, there are cladding lights with different transmission angles. In order to study the stripping effects of corroded cladding light strippers (CLS) on cladding light at various angles, we measured the scattering coefficient of the corroded section of the fiber. Meanwhile, we also simulated the relationship between the attenuation and the corrosion length of the cladding light at different transmission angles. To produce cladding light at different angles, we built two sets of stripper test systems : one to test the CLS made of double-clad fiber and one to test the coreless fiber. In the double-clad fiber experiment, the maximum transmission angle of the two-system cladding light was changed from 10 degrees to 3 degrees 12' and from 8 degrees to 3 degrees 1'. These angles deviate from the maximum transmission angle of light in the core by 2 degrees 27'. In the coreless fiber experiment, the maximum transmission angle of the two-system cladding light was changed from 11 degrees to 2 degrees 9' and from 8 degrees to 2 degrees 12'. The maximum transmission angle approaches 0 degrees as the cladding light attenuation increases. Finally, we tested the corroded cladding light stripper made of double-clad fiber on the tandem-pumped laser with a wavelength of 1 018 nm. The cladding light attenuation was 18. 3 dB at an input power of 1 136 W.