Predicting macrobending loss for large-mode area photonic crystal fibers

Abstract

We report on an easy-to-evaluate expression for the prediction of the bend-loss for a large mode area photonic crystal fiber (PCF) with a triangular air-hole lattice. The expression is based on a recently proposed formulation of the V-parameter for a PCF and contains no free parameters. The validity of the expression is verified experimentally for varying fiber parameters as well as bend radius. The typical deviation between the position of the measured and the predicted bend loss edge is within measurement uncertainty.

Photonic Crystal Multi-Core Fibers for Future High-Capacity Transmission Systems

“…However, since PCFs confine the light by air holes surrounding a silica core, they show quite different properties from conventional solid fibers. A macro-bending loss increase towards both short and long wavelengths is one of them [21], which is interesting but potentially limits the wide-band transmission ability of PCFs. In particular, the short wavelength bendloss edge practically limits the transmission bands of the PCFs.…”

Dispersion Effects of Fiber Bending Performed on Microstructured Fiber

“…Fiber bending is usually considered as an undesired phenomenon in the context of bending losses [2][3][4][5]. The topic is also related with the design of an optical fiber immune to bending [6].…”

Coupling starlight into single-mode photonic crystal fiber using a field lens

“…However, the reducing difference between the bulk refractive index of the cladding with respect to the core of the LMA fiber [3], which accounts for most this fibers interesting properties, also leads to a lower bendloss edge. The position of the edge is a function of the scale (and geometry) of the fiber [7] and care needs to be taken to match the correct fiber to the application to avoid either excessive bendlosses or unnecessarily stringent minimum bend radii in the fiber run.…”