| 摘要 |
<p>Fibers including fiber lasers and fiber amplifiers and systems containing such fibers are disclosed. The fibers included can comprise a core (610), a first cladding (210) around the core (610) with the first cladding (210) having an outer perimeter with at least two substantially flat sides and a second cladding around the first cladding (210) with the second (cladding) having a non-oval shaped perimeter.</p> |
