Now showing items 1-17 of 17

    • 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 high-energy yb-doped fiber amplifier 

      Öktem, Bülent; Kalaycioǧlu, Hamit; İlday, F. Ömer (IEEE, 2009)
      We report a robust, all-fiber amplifier seeded by a fiber oscillator. Seed pulses at 1 MHz repetition rate are amplified up to 3 μJ, delivering 1 μJ-energy, 170 fs-long pulses. Duration reduces to 120 fs at 1 μJ amplifier ...
    • All-fiber laser systems that can operate in burst mode 

      Kesim, D. K.; Kalaycioglu, H.; Akçaalan, O.; Ilday, F. O. (OSA - The Optical Society, 2016)
      Fiber lasers which operate in burst-mode where densely spaced pulses occur inside bursts repeated at much lower repetition rates can be valuable tool for sensing and imaging. We introduce such lasers and propose possible ...
    • Femtosecond laser written waveguides deep inside silicon 

      Pavlov, I.; Tokel, O.; Pavlova, S.; Kadan, V.; Makey, G.; Turnalı, A.; Yavuz, Ö.; Ilday, F. Ö. (Optical Society of America, 2017)
      Photonic devices that can guide, transfer, or modulate light are highly desired in electronics and integrated silicon (Si) photonics. Here, we demonstrate for the first time, to the best of our knowledge, the creation of ...
    • Fiber amplification of pulse bursts at low repetition rates via synchronous pulsed pumping 

      Kalaycıoğlu,Hamit; Yavaş, Seydi; İlday, F. Ömer; Eken, Koray (Optical Society of AmericaIstanbul Turkey, 2011)
      We report, for the first time, amplification of pulse-bursts in Yb-doped fiber at repetition rates as low as 200 Hz for applications to accelerators and material processing. Synchronous pulsed pumping allows suppression ...
    • 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, ...
    • Generation of Sub-20-fs Pulses From a Graphene Mode-Locked Laser 

      Canbaz, F.; Kakenov, N.; Kocabas, C.; Demirbas, U.; Sennaroglu, A. (OSA - The Optical Society, 2017)
      We demonstrate, what is to our knowledge, the shortest pulses directly generated to date from a solid-state laser, mode locked with a graphene saturable absorber (GSA). In the experiments, a low-threshold diode-pumped ...
    • Graphene mode-locked Cr:LiSAF laser at 850 nm 

      Canbaz F.; Kakenov, N.; Kocabas, C.; Demirbas, U.; Sennaroglu, A. (OSA - The Optical Society, 2015)
      We report, for the first time to our knowledge, a mode-locked femtosecond Cr:LiSAF laser initiated with a high-quality monolayer graphene saturable absorber (GSA), synthesized by chemical-vapor deposition. The tight-focusing ...
    • High average and peak power femtosecond large-pitch photonic-crystal-fiber laser 

      Baumgartl, M.; Jansen F.; Stutzki F.; Jauregui, C.; Ortaç, B.; Limpert J.; Tünnermann, A. (2011)
      We report on the generation of high-average-power and high-peak-power ultrashort pulses from a mode-locked fiber laser operating in the all-normal-dispersion regime. As gain medium, a large-mode-area ytterbium-doped ...
    • High-energy femtosecond photonic crystal fiber laser 

      Lecaplain, C.; Ortaç, B.; MacHinet G.; Boullet J.; Baumgart, M.; Schreiber, T.; Cormier, E.; Hideur, A. (2010)
      We report the generation of high-energy high-peak power pulses in an all-normal dispersion fiber laser featuring large-mode-area photonic crystal fibers. The self-starting chirped-pulse fiber oscillator delivers 11 W of ...
    • Microjoule pulse energies at 1 MHz repetition rate from an all-fiber nonlinear chirped-pulse amplifier 

      Kalaycioǧlu H.; Oktem, B.; Ömer Ilday F. (Optical Society of America, 2010)
      We report a 1-MHz robust, all-fiber amplifier-oscillator system. Amplified pulses of 3 μJ are externally compressed to 140 fs. The highest peak power from an integrated fiber source, up to 50 kW, is obtained. © 2010 Optical ...
    • Microjoule-energy, 1 MHz repetition rate pulses from all-fiber-integrated nonlinear chirped-pulse amplifier 

      Kalaycioglu, H.; Oktem, B.; Şenel, Ç.; Paltani, P. P.; Ilday, F. Ö. (Optical Society of America, 2010-03-23)
      We demonstrate generation of pulses with up to 4 μJ energy at 1 MHz repetition rate through nonlinear chirped-pulse amplification in an entirely fiber-integrated amplifier, seeded by a fiber oscillator. The peak power and ...
    • Non-thermal material and tissue processing with 100 MHz and 500 MHz repetition rate bursts 

      Kerse, Can; Kalaycıoğlu, Hamit; Akaalan O.; Eldeniz, Y.B.; İlday, F. Ömer; Hoogland H.; Holzwarth, R. (IEEE, 2013)
      There are a number of applications that would avail a pulse pattern in the form of closely grouped and uniformly spaced pulses, i.e., bursts [1]. Closely grouped pulses with pulse to pulse separation in the order of a few ...
    • Properties of a microjoule-class fiber oscillator mode-locked with a SESAM 

      Lecaplain, C.; Ortac, Bülend; MacHinet G.; Boullet J.; Baumgartl, M.; Schreiber, T.; Cormier, E.; Hideur, A. (IEEE, 2011)
      Energy scaling of ultrafast Yb-doped fiber oscillators has experienced rapid progress largely driven by many applications that require high average power femtosecond pulses. The fundamental challenge for ultrafast fiber ...
    • 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.; Yavaş, Seydi; İlday, F. Ömer; Yagci, M.E.; Aydin O.; Eken, K.; Sahin, B. (IEEE, 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 ...