Ultracompact cladding-pumped 35-mm-short fiber laser with 4.7-W single-mode output power

Abstract

We report on ultracompact cladding-pumped fiber lasers, fabricated from single-mode phosphate glass microstructured optical fibers, with several watts of cw output at 1.5μm. A maximum cw output power of 4.7W has been achieved from a fiber laser that is only 35mm in length, corresponding to a yield of 1.34W∕cm of active microstructured fiber.