Raman fiber laser improvement by using Yb3+-doped fiber
| Autor: | L. de la Cruz-May, E B Mejía |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Amplified spontaneous emission
Optical fiber Materials science business.industry Physics::Optics Condensed Matter Physics Industrial and Manufacturing Engineering Atomic and Molecular Physics and Optics law.invention symbols.namesake Optics Raman laser law Fiber laser symbols Dispersion-shifted fiber Fiber business Raman spectroscopy Instrumentation Raman scattering |
| Zdroj: | Laser Physics. 19:1017-1020 |
| ISSN: | 1555-6611 1054-660X |
| Popis: | We report here the efficiency improvement in a fiber Raman laser by splicing to it short pieces of 10000-ppm Yb3+-doped fibers. The amplified spontaneous emission produced by the doped fiber started the stimulated Raman scattering earlier than the spontaneous scattering in the 350-m silica-fiber cavity. In the best case, when splicing to the cavity 127 cm of doped fiber, the pump threshold decreased from 2.9 down to 1.27 W, representing a 56% improvement. This power was close to the theoretical minimum of 1.25 W for very long fibers. The second stokes signal (1175 nm) was only present when the doped fibers were inserted. At 4-W pump, the non-doped cavity delivered 2 W of first stokes signal (1117 nm) that represent a 50% efficiency compared to ∼3 W delivered (∼75%) when a 34-cm doped fiber was inserted. This improvement is intended to reduce the cost of fiber Raman lasers because less powerful sources or shorter fibers are necessary to produce more stokes components. |
| Databáze: | OpenAIRE |
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