Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber
Publication: Research - peer-review › Conference article – Annual report year: 2012
We report on an ytterbium doped single mode distributed mode filtering rod fiber in an amplifier configuration delivering high average output power, up to 292 watts, using a mode-locked 30ps source at 1032nm with good power conversion efficiency. We study the modal stability of the output beam at high average output power levels and demonstrate a 44% power improvement before the threshold-like onset of mode instabilities by operating the rod fiber in a leaky waveguide regime. We investigate the guiding dynamics of the rod fiber and explain the improved performance by thermally induced refractive index profile change.
|Journal||Proceedings of SPIE, the International Society for Optical Engineering|
|Conference||SPIE Photonics West : Fiber Lasers IX: Technology, Systems, and Applications|
|City||San Francisco, CA|
|Period||23/01/12 → 26/01/12|
|Citations||Web of Science® Times Cited: 0|
- Fiber lasers, Micro structure fibers
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