| 摘要 |
The invention concerns an optical fiber pumped through the cladding, including: a core having an optical index n1, around the core, a first cladding having an index n2 lower than n1, and around the first cladding, a second cladding having an index n3 lower than n2, characterized in that the interface between the first cladding and the second cladding has a substantially polygonal cross section. The invention also concerns a method of fabricating an optical fiber pumped through the cladding, characterized in that it consists in executing the following steps: placing around a central optical preform including a core having an index n1 surrounded by a first cladding having an index n2 lower than n1, a plurality of rods having an index n3 lower than n2, and drawing the optical preform and the rods in a vacuum to obtain an optical fiber including a core and two claddings.
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