Now showing items 1-19 of 19

    • 1 mJ pulse bursts from a Yb-doped fiber amplifier 

      Kalaycıoğlu, H.; Eldeniz, Y. B.; Akçaalan, Ö.; Yavaş S.; Gürel, K.; Efe, M.; Ilday, F. Ö. (Optical Society of America, 2012-06-22)
      We demonstrate burst-mode operation of a polarization-maintaining Yb-doped fiber amplifier capable of generating 60 μJ pulses within bursts of 11 pulses with extremely uniform energy distribution facilitated by a novel ...
    • 20-fs 1.6-mJ pulses from a cw-diode-pumped single-stage 1-kHz Yb amplifier 

      Andriukaitis G.; Kartashov, D.; Pugžlys, A.; Lorenc, D.; Baltuška, A.; Giniunas L.; Danielius, R.; Ilday O.F. (2010)
      200-fs 2.5-mJ pulses from a fiber-oscillator-seeded DPSS Yb:CaF2 MOPA are spectrally broadened in Ar and recompressed to 20 fs using a pair of LAK14 prisms. Multi-millijoule 12-fs pulses are feasible upon higher-order ...
    • 33-fs Yb-fiber laser comb locked to Cs-atomic clock 

      Senel, C.; Hamid, R.; Erdogan, C.; Celik, M.; Kara, O.; Ilday, F. O. (IEEE, 2013)
      Despite the prevalence of fiber frequency combs around 1.5 μm, few fully stabilized frequency combs have been demonstrated around 1.0 μm, despite the generally superior performance of Yb-fiber lasers compared to Er-fiber ...
    • 50-W, 1.6-GHz pulse repetition rate from a burst-mode Yb-doped fiber laser 

      Elahi P.; Ertek A.C.; Eken K.; Ömer Ilday F. (Institute of Electrical and Electronics Engineers Inc., 2017)
      We report a 50-W average power Yb-doped fiber laser amplifier system. The laser system produces bursts at a minimum rate of 200 kHz, with 1.6 GHz intraburst repetition rate. The total energy delivers in a burst is 250 μJ ...
    • All-fiber all-normal dispersion laser with a fiber-based Lyot filter 

      Özgören, K.; Ilday, F. Ö. (Optical Society of America, 2010-04-15)
      We propose the use of a short section of polarization-maintaining fiber as a birefringent medium to construct an all-fiber Lyot filter inside the cavity of a fiber laser. This allows mode-locked operation of an all-fiber ...
    • All-fiber nonlinearity-and dispersion-managed dissipative soliton nanotube mode-locked laser 

      Zhang Z.; Popa, D.; Wittwer, V. J.; Milana, S.; Hasan, T.; Jiang, Z.; Ferrari, A. C.; Ilday F. Ö. (American Institute of Physics, 2015)
      We report dissipative soliton generation from an Yb-doped all-fiber nonlinearity- and dispersion-managed nanotube mode-locked laser. A simple all-fiber ring cavity exploits a photonic crystal fiber for both nonlinearity ...
    • All-fiber Yb-doped laser mode-locked by nanotubes 

      Zhang, U.Z.; Popa, D.; Sun, Z.; Hasan, T.; Ferrari, A.C.; Ilday F.O. (IEEE Computer Society, 2013)
      Single-wall carbon nanotubes (SWNTs) and graphene have emerged as promising saturable absorbers (SAs), due to their broad operation bandwidth and fast recovery times [1-3]. However, Yb-doped fiber lasers mode-locked using ...
    • Balancing gain narrowing with self phase modulation: 100-fs, 800-nJ from an all-fiber-integrated Yb amplifier 

      Pavlov I.; Rybak, A.; Cenel, C.; Ilday F.O. (IEEE Computer Society, 2013)
      There is much progress in Yb-fiber oscillator-amplifier systems, which enable generation of high-repetition-rate, microjoule energies and sub-picosecond pulse widths [1,2]. Given the extremely large total gain factors to ...
    • Burst-mode Yb fiber amplifier producing 30 μJ individual pulse energy 

      Kalaycioǧlu H.; Burak Eldeniz, Y.; Ömer Ilday F.; Eken, K. (2012)
      We report 30-μJ individual pulse energy for 150-ns long amplified bursts of 0.4 mJ total energy from a 1-kHz Yb-fiber amplifier. Non-uniformity of pulse energy distribution inside amplified bursts is significantly reduced. ...
    • Characterization of coupling of pump fluctuations to laser in mode-locked Yb-doped and Er-doped fiber oscillators 

      Budunoǧlu I.L.; Gürel, K.; Ilday F.Ö. (2010)
      Transfer of fluctuations of pump power to laser power is characterized for mode-locked fiber oscillators. Contribution of pump noise to laser noise is estimated. Limits to pump modulation bandwidth for carrier-envelopephase ...
    • Doping management for high-power fiber lasers: 100 W, few-picosecond pulse generation from an all-fiber-integrated amplifier 

      Elahi, P.; Yilmaz, S.; Akçaalan, Ö.; Kalaycioğlu, H.; Öktem, B.; Şenel, Ç.; Ilday, F. Ö.; Eken, K. (Optical Society of America, 2012-07-16)
      Thermal effects, which limit the average power, can be minimized by using low-doped, longer gain fibers, whereas the presence of nonlinear effects requires use of high-doped, shorter fibers to maximize the peak power. We ...
    • Fiber amplification of pulse bursts up to 20 μj pulse energy at 1 kHz repetition rate 

      Kalaycioglu, H.; Eken, K.; Ilday, F. O. (Optical of Society of America, 2011-08-23)
      We demonstrate burst-mode operation of a polarization-maintaining Yb-doped fiber amplifier. Groups of pulses with a temporal spacing of 10 ns and 1 kHz overall repetition rate are amplified to an average pulse energy of ...
    • Fiber laser-microscope system for femtosecond photodisruption of biological samples 

      Yavaş S.; Erdogan, M.; Gürel, K.; Ilday, F. Ö.; Eldeniz, Y. B.; Tazebay, U. H. (Optical Society of America, 2012-02-22)
      We report on the development of a ultrafast fiber lasermicroscope system for femtosecond photodisruption of biological targets. A mode-locked Yb-fiber laser oscillator generates few-nJ pulses at 32.7 MHz repetition rate, ...
    • Filterless all-normal dispersion fiber laser 

      Özgören, K.; Ilday, F. Ö. (2009)
      We demonstrate mode-locked operation of an allnormal dispersion Yb-fiber oscillator without the use of bulk bandpass filter. A section of PM-fiber incorporated into the cavity acts as a filter, paving the way towards an ...
    • Pulse fidelity control in a 20-μJ sub-200-fs monolithic Yb-fiber amplifier 

      Fernández, A.; Zhu, L.; Verhoef, A. J.; Sidorov-Biryukov, D.; Pugzlys, A.; Galvanauskas, A.; Ilday, F. Ö.; Baltuška, A. (Pleiades Publishing, 2011-06-04)
      We discuss nonlinearity management versus energy scalability and compressibility in a three-stage monolithic 100-kHz repetition rate Yb-fiber amplifier designed as a driver source for the generation and tunable parametric ...
    • Repetition rate tuning of an ultrafast ytterbium doped fiber laser for terahertz time-domain spectroscopy 

      Keskin H.; Altan H.; Yavas, S.; Ilday F.O.; Yagci, M.E.; Aydin O.; Eken, K.; Sahin, B. (2013)
      Repetition rate tuning enables the fast acquisition of THz pulse profiles [1]. By using this method we demonstrate a compact and broadband terahertz time domain spectroscopy system (THz TDS) driven by ytterbium doped fiber ...
    • Sub-50 fs all-fiber Yb-doped laser with anomalous-dispersion photonic crystal fiber 

      Zhang, Z.; Cenel, C.; Hamid, R.; Ilday F.O. (IEEE Computer Society, 2013)
      An intense research effort has been channelled into improving mode-locked Yb-fiber oscillators in recent years. Despite efforts in all-normal dispersion oscillators, dispersion management is evidently necessary to reach ...
    • Sub-50 fs Yb-doped laser with anomalous-dispersion photonic crystal fiber 

      Zhang, Z.; Şenel, Ç.; Hamid, R.; Ilday, F. Ö. (Optical Society of America, 2013)
      We report on the generation of 42 fs pulses at 1 μm in a completely fiber-integrated format, which are, to the best of our knowledge, the shortest from all-fiber-integrated Yb-doped fiber lasers to date. The ring fiber ...
    • Texturing of titanium (Ti6Al4V) medical implant surfaces with MHz-repetition-rate femtosecond and picosecond Yb-doped fiber lasers 

      Erdoǧan, M.; Öktem, B.; Kalaycioǧlu H.; Yavaş, S.; Mukhopadhyay P.K.; Eken, K.; Özgören, K.; Aykaç, Y.; Tazebay, U.H.; Ilday F.O. (Optical Society of American (OSA), 2011)
      We propose and demonstrate the use of short pulsed fiber lasers in surface texturing using MHz-repetition-rate, microjoule- and sub-microjoule-energy pulses. Texturing of titanium-based (Ti6Al4V) dental implant surfaces ...