| 摘要 |
PROBLEM TO BE SOLVED: To provide double-clad GPFs designed to increase cladding absorption of pump light while maintaining single signal mode operation.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. |
