| 摘要 |
PROBLEM TO BE SOLVED: To provide double-clad GPFs designed for increased cladding absorption of pump light while maintaining operation in a single signal mode.SOLUTION: The cladding absorption of single-mode, double-clad, gain-producing fibers is increased in fiber designs that includes a trench region disposed between a core region and an inner cladding region. The increased cladding absorption is achieved while maintaining single-mode operation.SELECTED DRAWING: Figure 1 |
