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      Burst-mode thulium all-fiber laser delivering femtosecond pulses at a 1 GHz intra-burst repetition rate

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      Author
      Elahı, P.
      Kalaycıoğlu, H.
      Akçaalan, Ö.
      Şenel, Ç.
      Ilday, F. Ö.
      Date
      2017
      Source Title
      Optics Letters
      Print ISSN
      0146-9592
      Publisher
      Optical Society of America
      Volume
      42
      Issue
      19
      Pages
      3808 - 3811
      Language
      English
      Type
      Article
      Item Usage Stats
      132
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      199
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      Abstract
      We report on the development of, to the best of our knowledge, the first ultrafast burst-mode laser system operating at a central wavelength of approximately 2 μm, where water absorption and, consequently, the absorption of most biological tissue is very high. The laser comprises a harmonically mode-locked 1-GHz oscillator, which, in turn, seeds a fiber amplifier chain. The amplifier produces 500 ns long bursts containing 500 pulses with 1 GHz intra-burst and 50 kHz inter-burst repetition rates, respectively, at an average power of 1 W, corresponding to 40 nJ pulse and 20 μJ burst energies, respectively. The entire system is built in an all-fiber architecture and implements dispersion management such that output pulses are delivered directly from a single-mode fiber with a duration of 340 fs without requiring any external compression. This gigahertz-repetition-rate system is intended for ablation-cooled laser material removal in the 2 μm wavelength region, which is interesting for laser surgery due to the exceptionally high tissue absorption at this wavelength.
      Keywords
      Electromagnetic pulse
      Fiber amplifiers
      Fiber lasers
      Fibers
      Laser surgery
      Single mode fibers
      Tissue
      Water absorption
      Biological tissues
      Burst repetition rate
      Central wavelength
      Dispersion management
      Fiber amplifier chains
      Laser material removal
      Tissue absorption
      Wavelength regions
      Pulse repetition rate
      Permalink
      http://hdl.handle.net/11693/37023
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OL.42.003808
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
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