Now showing items 1-20 of 15625

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

      Kalaycıoğlu, Hamit; Eldeniz, Y. B.; Akçalan, Önder; Yavaş, Seydi; Efe, M.; İlday, Fatih Ömer (Optical Society of America, 2012-07-01)
      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 ...
    • 1-6 üniteler 

      Konuralp, Haluk; Özekes, M. (Anadolu Üniversitesi Yayınları, 2006)
    • 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.
    • 1.5D parallel sparse matrix-vector multiply 

      Kayaaslan, E.; Aykanat, Cevdet; Uçar, B. (Society for Industrial and Applied Mathematics, 2018)
      There are three common parallel sparse matrix-vector multiply algorithms: 1D row-parallel, 1D column-parallel, and 2D row-column-parallel. The 1D parallel algorithms offer the advantage of having only one communication ...
    • 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 ...
    • 1/f Noise characteristics of SEJ Y-Ba-Cu-O Rf-SQUIDs on LaAlO3 substrate and the step structure, film, and temperature dependence 

      Fardmanesh, M.; Schubert, J.; Akram, R.; Bick, M.; Zhang, Y.; Banzet, M.; Zander, W.; Krause, H. J.; Burkhart, H.; Schilling, M. (IEEE, 2001-03)
      Step edge junction (SEJ) rf-SQUID magnetometers and gradiometers were fabricated using PLD Y-Ea-Cu-0 films on LaA10,(100) and SrTi0,(100) substrates. Effects of different step structure and the film properties on the yield, ...
    • 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 yıl sonra Dede Korkut Oğuznameleri ve notlar 

      Özay, Y. (Geleneksel Yayıncılık, 2010)
      Semih Tezcan ve Hendrik Boeschoten’in hazırladıkları, 2001 yılında Yapı Kredi Yayınları’ndan çıkan Dede Korkut Oğuznameleri (316 s.) ile yine aynı yıl, aynı yayınevinden çıkan Semih Tezcan’ın hazırladığı Dede Korkut ...
    • 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 ...
    • 1018 nm Yb-doped high-power fiber laser pumped by broadband pump sources around 915 nm with output power above 100 W 

      Midilli, Y.; Efunbajo, O. B.; Şimşek, B.; Ortaç, B. (OSA - The Optical Society, 2017)
      We demonstrate a 1018 nm ytterbium-doped all-fiber laser pumped by tunable pump sources operating in the broad absorption spectrum around 915 nm. In the experiment, two different pump diodes were tested to pump over a wide ...
    • 11th international conference MMET*2006 

      Altıntaş, Ayhan (IEEE, 2007)
      The 11th International Conference on Mathematical Methods in Electromagnetic Theory (MMET*06) was organized and sponsored by the IEEE AP-S East Ukraine Joint Chapter at the Kharkiv National University, Kharkiv, Ukraine, ...
    • A 128-bit microprocessor compatible programmable correlator chip for use in synchronous communication 

      Ungan, İ. Enis; Topçu, Satılmış; Atalar, Abdullah (IEEE, 1989)
      A single-chip microprocessor-compatible 128-b correlator is designed and implemented in a 3-μm M2CMOS process. Full-custom design techniques are applied to achieve the best tradeoff among chip size, speed, and power ...
    • 130 nJ 77 fs dissipative soliton fiber laser 

      Baumgartl, M.; Ortaç, Bülend; Lecaplain, C.; Hideur, A.; Limpert J.; Tünnermann, A. (OSA, 2010)
      We report on ultrashort high-energy pulse generation from an all-normal-dispersion fiber oscillator. The watt-level laser directly emits chirped pulses with a duration of 1ps and 163nJ of pulse energy. These can be compressed ...
    • 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 ...
    • The 16 cubes game for children who are visually impaired 

      Evyapan, N. A. G. Z.; Demirkan, H. (Sage Publications, Inc., 2000)
    • 1680-1747 Ottoman budgets and deficits sustainability in a period of fiscal transition: wars and administrative changes 

      Berument, Hakan; Ocaklı, N. (American Economic Association, 2006)
      This paper studies the sustainability of the Ottoman budget for the period from 1680 to 1747, during different sultanates and war eras. Moreover, we investigate whether the relationship between government revenues and ...
    • 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 ...