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01096 am a22001813u 4500 |
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77841 |
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|a Broderick, N.G.R.
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|a Offerhaus, H.L.
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|a Richardson, D.J.
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|a Sammut, R.A.
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|a Caplen, J.
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|a Dong, L.
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|a Large mode area fibers for high power applications
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|c 1999-04.
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|z Get fulltext
|u https://eprints.soton.ac.uk/77841/1/1734.pdf
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|a We review our recent work toward designing large mode area fibers for high power applications. We show that appropriately designed doped multi-mode fibers can be used to provide robust single-mode output when used in fiber laser cavities. Single-mode (SM) fiber mode field diameters of ~35µm are demonstrated with record SM pulse energies of 0.5mJ at 1550nm with a repetition rate of 200Hz. Energies approaching 1mJ are obtained with a slight compromise in mode quality. A modification in the laser cavity results in a passively modelocked laser giving femtosecond pulses with nanojoule energies.
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