Spectral beam combining of Yb-doped fiber lasers using wavelength dependent polarization rotators and polarization beam combiners

TL;DR

This paper introduces a robust spectral beam combining method for Yb-doped fiber lasers using wavelength-dependent polarization rotators and beam combiners, demonstrating high efficiency and scalability up to 90W.

Contribution

The paper presents a novel spectral beam combining scheme that enhances power scalability and efficiency for fiber lasers using polarization control techniques.

Findings

Achieved high combining efficiency with two Yb-doped fiber lasers.

Demonstrated successful power scaling up to 90W.

Showed potential for high power applications in beam combining.

Abstract

We propose a robust spectral beam combining scheme using wavelength dependent polarisation rotators and polarization beam combiners. We successfully demonstrated the concept for two Yb-doped fiber lasers at 1064nm and 1092nm up to a total input power of 90W. The results reveal a very good combining efficiency and the potential for scaling to high power operations in this method of beam combining.