Frequently Asked Questions

A 50% GeO2 core concentration gives a high refractive index contrast (Δn = 0.074) relative to the cladding, which is what makes highly Ge-doped fiber useful for nonlinear optical applications.

The elliptical core geometry (approximately 4×3 µm) is part of the fiber's design for tailored mode and nonlinear properties for specific applications.

Attenuation ranges from about 23 dB/km at 1060 nm down to 6.7 dB/km at 1550 nm, rising again at longer wavelengths (~7 dB/km at 1850 nm, 49 dB/km at 2100 nm).