Abstract
Fiber lasers have been increasingly playing a significant role in marking, cutting, welding, and other material processing industrial applications. Further power scaling of fiber lasers needs to overcome transverse mode instability and a range of nonlinear effects. Further improvements in effective mode area scaling and higher-order-mode suppression are essential. All-solid photonic bandgap fiber provides a potentially powerful solution due to its strong higher-order-mode suppression in large cores. In this talk, we will review our work in this area.
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