Draka Comteq B.v.

Aurelien Bergonzo

Louis-Anne De Montmorillon

Alain Pastouret

Ekaterina Burov

An amplifying optical fiber includes an inner core, an inner cladding, a depressed trench, and an outer cladding (e.g., an outer optical cladding). Typically, the inner core includes a main matrix (e.g., silica-based) doped with at least one rare earth element. The depressed trench typically has a volume integral Vof between about &#x2212;2200&#xd7;10&#x3bc;mand &#x2212;1600&#xd7;10&#x3bc;m. Exemplary embodiments of the amplifying optical fiber are suitable for use in a compact configuration and high power applications.

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Chaville, France

Aurelien Bergonzo