Single-mode mid-IR guidance in a hollow-core photonic crystal fiber.
We report, for the first time, bandgap guidance above 3 mum in a silica based air-core photonic crystal fiber. The peak of the bandgap is at 3.14mum with a typical attenuation of ~ 2.6 dB m-1. By further optimization of the structure, modeling suggests that a loss below 1 dB m-1 should be achievable, greatly extending the useful operating range of silica-based single-mode fibers. Such fibers have many potential applications in the mid-IR, offering an alternative to fluoride, tellurite or chalcogenide glass based optical fibers for chemical and biological sensing applications.
Shephard
J
J
Macpherson
W
W
Maier
R
R
Jones
J
J
Hand
D
D
Mohebbi
M
M
George
A
A
Roberts
P
P
Knight
J
J