Now showing items 1-10 of 10

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

      Kalaycıoğlu, Hamit; Eldeniz, Y. B.; Akçaalan, Önder; Yavaş Seydi; Gürel, Kutan; Efe, M.; İlday, Ömer Fatih (Optical Society of America, 2012-05)
      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 ...
    • 1.7-GHz intra-burst repetition rate Yb-fiber amplifier system 

      Kalaycıoğlu, Hamit; Elahi, Parviz; Kerse, Can; Akçaalan, Önder; İlday, F. Ömer (IEEE, 2015)
      Material processing efficiency of ultrafast pulses increases dramatically with repetition rate of the pulses, if the conditions are adjusted correctly to avoid excessive plasma and particulate shielding. However, given ...
    • 10 μJ 150 fs all-fiber Yb laser amplifier system 

      Akçaalan, Önder; Kalaycıoğlu, Hamit; Kesim, Denizhan Koray; İlday, F. Ömer (IEEE, 2015)
      Femtosecond laser pulse sources have become increasingly popular in the last decade as a result of their practical features, such as insensitivity to environmental variations, versatile designs, high-power outputs. However, ...
    • Ablation-cooled material removal at high speed with femtosecond pulse bursts 

      Kerse, Can; Kalaycıoğlu, Hamit; Elahi, Parviz; Akçaalan, Önder; Yavaş, S.; Aşık, M. D.; Kesim, Deniz Koray; Yavuz, Koray; Çetin, Barbaros; İlday, Fatih Ömer (OSA, 2015)
      We report exploitation of ablation cooling, a concept well-known in rocket design, to remove materials, including metals, silicon, hard and soft tissue. Exciting possibilities include ablation using sub-microjoule pulses ...
    • All-fiber laser systems that can operate in burst mode 

      Kesim, Denizhan Koray; Kalaycıoğlu, Hamit; Akçaalan, Önder; İlday, Fatih Ömer (OSA, 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 ...
    • All-fiber nanosecond laser system generating supercontinuum spectrum for photoacoustic imaging 

      Yavas, S.; Kipergil, E. A.; Akçaalan, Önder; Eldeniz, Y. Burak; Arabul, U.; Erkol H.; Unlu, M.B.; Ilday, F. Ömer (IEEE, 2013)
      Photoacoustic microscopy (PAM) research, as an imaging modality, has shown promising results in imaging angiogenesis and cutaneous malignancies like melanoma, revealing systemic diseases including diabetes, hypertension, ...
    • Compact 1.5-GHz intra-burst repetition rate Yb-doped all-PM-fiber laser system for ablation-cooled material removal 

      Akçaalan, Önder; Kalaycıoğlu, Hamit; Elahi, Parviz; Deminskyi, Petro; İlday, Fatih Ömer (OSA, 2017)
      Summary form only given. Femtosecond (fs) laser pulse sources have become increasingly popular in the last decade as a result of their practical features, such as insensitivity to environmental variations, versatile designs, ...
    • Crossed chiral band approximation for wide-band self-collimation of light 

      Gümüş, M. A.; Akçaalan, Önder; Kurt, H. (Institute of Physics Publishing, 2020)
      We propose a perspective to the evaluation of the wide bandwidth phenomenon for low-symmetric photonic structures, by introducing the band tailoring and chiral band approximation on the self-collimation effect. In the ...
    • High-speed, thermal damage-free ablation of brain tissue with femtosecond pulse bursts 

      Kerse, Can; Yavaş, Seydi; Kalaycıoğlu, Hamit; Asik M.D.; Akçaalan, Önder; İlday, F. Ömer (IEEE, 2016)
      We report a novel ultrafast burst mode fiber laser system and results on ablation of rat brain tissue at rates approaching an order of magnitude improvement over previous reports, with no discernible thermal damage. © 2015 IEEE.
    • A novel fiber laser development for photoacoustic microscopy 

      Yavaş, Seydi; Aytac-Kipergil, E.; Arabul, M.U.; Erkol H.; Akçaalan, Önder; Eldeniz, Y.B.; İlday, F. Ömer; Unlu, M.B. (SPIE, 2013)
      Photoacoustic microscopy, as an imaging modality, has shown promising results in imaging angiogenesis and cutaneous malignancies like melanoma, revealing systemic diseases including diabetes, hypertension, tracing drug ...