Now showing items 1-20 of 4048

    • 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 ...
    • 1.06μm-1.35μm coherent pulse generation by a synchronously-pumped phosphosilicate Raman fiber laser 

      Elahi, Parviz; Makey, Ghaith; Turnalı, Ahmet; Tokel, Onur; İlday, Fatih Ömer (OSA, 2017)
      Summary form only given. Rare-earth-doped fiber lasers are attractive for microscopy and imaging applications and have developed over the past decades rapidly. They are unable to cover near-infra-red region entirely and ...
    • 1.3 μm GaAs based resonant cavity enhanced Schottky barrier internal photoemission photodetector 

      Necmi, B.; Kimukin, I.; Özbay, Ekmel; Tuttle, G. (IEEE, Piscataway, NJ, United States, 2000)
      GaAs based photodetectors operating at 1.3 μm that depend on internal photoemission as the absorption mechanism were fabricated. Quantum efficiency (QE) was increased using resonant cavity enhancement (RCE) effect.
    • 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 W, 10 ns, 50 kHz all-fiber laser at 1.55 µm 

      Pavlov, Ihor; Dülgergil, E.; İlbey, Emrah; İlday, Fatih Ömer (Optical Society of America, 2012)
      We report on an all-fiber, singlemode MOPA system at 1.55 µm producing 10-ns, 200-µJ pulses with 20 kW of peak power and utilize it to micromachine crystalline Si, which is largely transparent at this wavelength.
    • 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, ...
    • 10-W, 156-MHz all-fiber-integrated Er-Yb-doped fiber laser-amplifier system 

      Pavlov, Ihor; İlbey, Emrah; Dülgergil, Ebru; İlday, Fatih Ömer (Optical Society of America, 2012)
      We demonstrate all-fiber, high-power chirped-pulse-amplifier system, operating at 1550 nm. 156-MHz soliton oscillator seeds a two-stage single-mode amplifier with output power of 10 W. After external compression, pulse ...
    • 100-GHz resonant cavity enhanced Schottky photodiodes 

      Onat, B. M.; Gökkavas, M.; Özbay, Ekmel; Ata, E. P.; Towe, E.; Ünlü, M. S. (Institute of Electrical and Electronics Engineers, 1998)
      Resonant cavity enhanced (RCE) photodiodes are promising candidates for applications in optical communications and interconnects where ultrafast high-efficiency detection is desirable. We have designed and fabricated RCE ...
    • 15-Lipoxygenase-1 re-expression in colorectal cancer alters endothelial cell features through enhanced expression of TSP-1 and ICAM-1 

      Tunçer, S.; Keşküş, A. G.; Çolakoğlu, M.; Çimen, I.; Yener, C.; Konu, Ö.; Banerjee, S. (Elsevier, 2017-11)
      15-lipoxygenase-1 (15-LOX-1) oxygenates linoleic acid to 13(S)-hydroxyoctadecadienoic acid (HODE). The enzyme is widely suppressed in different cancers and its re-expression has tumor suppressive effects. 15-LOX-1 has been ...
    • 175 fs-long pulses from a high-power single-mode er-doped fiber laser at 1550 nm 

      Elahi, P.; Kalaycıoğlu, H.; Li, H.; Akçaalan, Ö.; Ilday, F. Ö. (Elsevier, 2017)
      Development of Er-doped ultrafast lasers have lagged behind the corresponding developments in Yb- and Tm-doped lasers, in particular, fiber lasers. Various applications benefit from operation at a central wavelength of 1.5 ...
    • 2 + 1 KdV(N) equations 

      Gürses, M.; Pekcan, A. (American Institute of Physics, 2011)
      We present some nonlinear partial differential equations in 2 + 1-dimensions derived from the KdV equation and its symmetries. We show that all these equations have the same 3-soliton solution structures. The only difference ...
    • (2+1)-dimensional local and nonlocal reductions of the negative AKNS system: soliton solutions 

      Gürses, Metin; Pekcan, A. (Elsevier, 2018)
      Wefirstconstructa(2+1)dimensionalnegativeAKNShierarchyandthenwegiveallpossiblelocaland(discrete)nonlocalreductionsoftheseequations.WefindHirotabilinearformsofthenegativeAKNShierarchyandgiveone-andtwo-solitonsolutions.Byu ...
    • [2+2] cycloadditions of sorbyl tosylate with imines/1-azadienes: a one-pot domino approach for α-alkylidene-β-lactams and their computational studies and antimicrobial evaluation 

      Kumar, Y.; Bedi, P. M. S.; Singh, P.; Adeniyi, A. A.; Singh-Pillay, A.; Singh, P.; Bhargava, G. (Wiley-Blackwell, 2018)
      The manuscript describes a straightforward and atom-efficient method for the synthesis of α-alkylidene-β-lactams using sorbyl tosylate and imines/1-azadienes at high temperature (80 °C). The Density functional theory ...
    • 2-Killing vector fields on warped product manifolds 

      Shenawy, S.; Ünal, B. (World Scientific Publishing, 2015)
      This paper provides a study of 2-Killing vector fields on warped product manifolds as well as characterization of this structure on standard static and generalized Robertson-Walker space-times. Some conditions for a 2-Killing ...
    • 20-fs 1.6-mJ pulses from a cw-diode-pumped single-stage 1-kHz Yb amplifier 

      Andriukaitis, G.; Kartashov, D.; Pugzlys, A.; Lorenc, D.; Baltuska, A.; Giniunas, L.; Danielius, R.; İlday, Ömer Fatih (OSA, 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 ...
    • 2012 William allan award introduction: Uta Francke 

      Özçelik, T. (Elsevier, 2013-03-07)
    • 2D material liquid crystals for optoelectronics and photonics 

      Hogan, Ben T.; Kovalska, Evgeniya; Craciun, Monica F.; Baldycheva, Anna (Royal Society of Chemistry, 2017)
      The merging of the materials science paradigms of liquid crystals and 2D materials promises superb new opportunities for the advancement of the fields of optoelectronics and photonics. In this review, we summarise the ...
    • 3-Propionyl-thiazolidine-4-carboxylic acid ethyl esters: A family of antiproliferative thiazolidines 

      Önen-Bayram F.E.; Buran, K.; Durmaz I.; Berk, B.; Cetin-Atalay, R. (Royal Society of Chemistry, 2015)
      Cancer results from unregulated cell growth. Reactivating the process of the programmed cell death, i.e. apoptosis, is a classical anticancer therapeutic strategy. The apoptosis-inducing property of the (2RS,4R)-2-phenyl ...
    • 3.5-GHz Intra-Burst Repetition Rate Ultrafast Yb-Doped Fiber Laser 

      Kerse, C.; Kalaycioʇlu, H.; Elahi, P.; Akçaalan, Ö.; Ilday, F. Ö. (Elsevier, 2016)
      We report on an all-fiber Yb laser amplifier system with an intra-burst repetition rate of 3.5 GHz. The system is able to produce minimum of 15-ns long bursts containing approximately 50 pulses with a total energy of 215μJ ...
    • 3.5-W, 42-MHz, single-mode chirped pulse amplification fiber laser system at 1560 nm 

      Elahi, Parviz; Li, Huihui; İlday, Fatih Ömer (OSA, 2017)
      There is much interest in the development of high power ultra-short fiber laser systems due to their significant properties and applications. Among them, Er-doped fiber lasers are showing more attention, especially in ...