Fundamental-mode cutoff in a photonic crystal fiber with a depressed-index core.
We report a photonic crystal fiber with a depressed-index core doped with fluorine. The effective index of the cladding matches that of the core at an antiguiding wavelength, below which the fiber does not guide light at all.
B J
BJ
Mangan
J
J
Arriaga
T A
TA
Birks
J C
JC
Knight
P S
PS
Russell