High efficiency 110 W monolithic FBG tuned 2 μm fiber laser

The paper reports a robust fibre Bragg grating (FBG) tuned Tm-doped fiber laser pumped with 793 nm delivering 110 W CW at 2 μm with 55% slope efficiency. The laser operated in single transverse mode at 2050 nm (FWHM ˜2 nm) determined by the reflectivity of the FBG. This demonstration was enabled by...

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Bibliographic Details
Main Authors: Frith, G.P., Samson, B., Carter, A., Farroni, J., Tankala, K.
Format: Conference Proceeding
Language:English
Subjects:
Bragg gratings
Fiber gratings
Fiber lasers
Laser excitation
Laser modes
Laser transitions
Laser tuning
Power generation
Power lasers
Pump lasers
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Summary:The paper reports a robust fibre Bragg grating (FBG) tuned Tm-doped fiber laser pumped with 793 nm delivering 110 W CW at 2 μm with 55% slope efficiency. The laser operated in single transverse mode at 2050 nm (FWHM ˜2 nm) determined by the reflectivity of the FBG. This demonstration was enabled by recently developed true large mode area (LMA) Tm-doped fibers which employ the use of an undoped pedestal region surrounding the rare earth doped core.
DOI:10.1109/CLEOE-IQEC.2007.4386482