Large mode area fibers for single-mode transmission near 2μm

The Large Mode Area ( LMA) fibers are attractive in the field of new components in optical fiber technology in the field of sensing and novel radiation sources. The numerical analysis of multi-ring (multi trench) fiber construction is investigated for eye-safe transmission spectral range (1400-2100 nm). The optical fiber refractive profile construction of Delta n (0.0010.004) for different radial step Delta r (1.0-1.6 mu m) is used for the investigation of linearly polarized modes (LP01 and LP11) propagation. The maximum mode field diameter (MFD) of LP01 was calculated. The results confirm the LMA propagation possibility in the presented fiber construction. The single- mode guiding was confirmed for different Delta n and Delta r parameters in the investigated spectral range. The cutoff wavelength < 1400 nm and single-mode operation are possible for Delta n=0.001 and Delta r=1 mu m.

Automated summary

The study investigated the propagation of linearly polarized modes in a new type of large mode area fiber, confirming the potential for propagation in this fiber structure.