Diffraction in air-clad fibres.
The angular transmissivity of high numerical aperture air-clad fibres is measured as a function of skewness of the launched light. Within the experimental limits the measured transmissivity of skew rays is significantly lower compared to theoretical predictions for air-clad fibres with uniform cladding surfaces. The discrepancy is attributed to diffractive losses of skew rays from the periodic corrugations at the pump core-cladding air interface.
Aslund
M
M
Canning
J
J
Jackson
S
S
Teixeira
A
A
Lyytikäinen
K
K