IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Articole din publicaţii internaţionale by Subject "lasers"

Browsing Articole din publicaţii internaţionale by Subject "lasers"

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  • Analysis of self-pulsation characteristics of InGaN laser diode 
    TRONCIU, V. Z.; YAMADA, Minoru; ABRAM, R. A. (American Physical Society, 2004)
    We report the results of numerical investigations of the dynamical behavior of a blue-violet InGaN laser with a specially incorporated saturable absorber. We have identified the nature of the bifurcation that occurs in the ...
  • Anomalous retroreflection from strongly absorbing nanoporous semiconductors 
    PRISLOPSKI, S. Ya.; NAUMENKO, E. K.; TIGINYANU, I. M.; GHIMPU, L.; MONAICO, E.; SIRBU, L.; GAPONENKO, S. V. (Optical Society of America, 2011)
    Pronounced retroreflection behavior is reported for a fishnet nanoporous strongly absorbing semiconductor material. Retroreflection features a half-cone about 0.35 rad along with diffusive specular reflection for all angles ...
  • Anticipated synchronization of semiconductor lasers with passive dispersive reflectors 
    CIOBANU, Nellu; RUSU, Spiridon; TRONCIU, Vasile (Editura Academiei Romane, 2017)
    We explore a new model for anticipated synchronization of distributed feedback lasers with passive dispersive reflectors. The influence of device parameters on the anticipated synchronization is discussed. The conditions ...
  • Cercetarea diodelor laser cu emisie verticală pentru module optoelectronice 
    DOROGAN, Valerian; VIERU, Tatiana; DOROGAN, Andrei; VIERU, Stanislav (Universitatea de Stat „Bogdan Petriceicu Hasdeu“, Cahul, 2017)
    The paper presents the results of measurements and analysis of parameters and characteristics of Vertical Cavity Surface Emitting Laser (VCSEL) Diode to use in optoelectronics module for communication and gas detectors on ...
  • Chaos Communication with Quantum Dots Lasers under the Influence of Multiple Feedback 
    OLOINIC, Tatiana; RUSU, Spiridon S.; TRONCIU, Vasile Z. (Institutul de Fizică Aplicată al AŞM, 2017)
    In this paper, we show the results on the dynamical behaviour of semiconductor laser with quantum dots under the influence of multiple feedback from external optical cavities.
  • Chaos Generation and Synchronization Using an Integrated Source With an Air Gap 
    TRONCIU, Vasile Z.; MIRASSO, Claudio R.; COLET, Pere; HAMACHER, Michael; BENEDETTI, Mauro; VERCESI, Valeria; ANNOVAZZI-LODI, Valerio (IEEE, 2010)
    We discuss experimentally and numerically the dynamical behavior of a novel integrated semiconductor laser subject to multiple optical feedback loops. The laser's structure consists of distributed feedback section coupled ...
  • Chaos-based communications using semiconductor lasers subject to feedback from an integrated double cavity 
    TRONCIU, V. Z.; MIRASSO, Claudio R.; COLET, Pere (IOP Publishing, 2008)
    We report the results of numerical investigations of the dynamical behaviour of an integrated device composed of a semiconductor laser and a double cavity that provides optical feedback. Due to the influence of the feedback, ...
  • Chaotic dynamics of a semiconductor laser with double cavity feedback: Applications to phase shift keying modulation 
    TRONCIU, V. Z.; ERMAKOV, I. V.; COLET, Pere; MIRASSO, Claudio R. (Elsevier, 2008)
    We report results on the numerical investigations of the dynamical behavior of a single mode semiconductor laser under the influence of double cavity optical feedback. We find that the system displays, under certain ...
  • Chaotic semiconductor ring lasers subject to optical feedback: Applications to chaos-based communications 
    ERMAKOV, Ilya V.; KINGNI, Sifeu T.; TRONCIU, Vasile Z.; DANCKAERT, Jan (Elsevier, 2013)
    Synchronisation of two unidirectionally coupled semiconductor ring lasers working in a chaotic regime (transmitter and receiver) is studied numerically. Two different configurations: open and closed loops, and two different ...
  • Controlling the unstable emission of a semiconductor laser subject to conventional optical feedback with a filtered feedback branch 
    ERMAKOV, I. V.; TRONCIU, V. Z.; COLET, Pere; MIRASSO, Claudio R. (Optical Society of America, 2009)
    We show the advantages of controlling the unstable dynamics of a semiconductor laser subject to conventional optical feedback by means of a second filtered feedback branch. We give an overview of the analytical solutions ...
  • Detection of individual terahertz pulses at 80 MHz repetition rate 
    RETTICH, F.; VIEWEG, N.; COJOCARI, O.; DENINGER, A. (IEEE, 2015)
    We present a novel technique to detect individual terahertz pulses at a repetition rate of 80 MHz. Our setup combines a femtosecond fiber laser, an InGaAs-based terahertz emitter, a zero-bias Schottky detector, and a ...
  • The dynamic behavior of quantum dots laser under the influence of external optical feedback from five external cavities 
    OLOINIC, Tatiana (Academia de Ştiinţe a Moldovei, 2019)
    In this paper, the dynamic behavior of quantum dots laser under the influence of a multiple optical feedback is described. The laser’s structure consists of an active section and additional sections from which the optical ...
  • Dynamics of single mode semiconductor lasers with passive dispersive reflectors 
    TRONCIU, Vasile Z.; WÜNSCHE, Hans-J.; SIEBER, Jan; SCHNEIDER, Klaus; HENNEBERGER, Fritz (Elsevier, 2000)
    We discuss the impact of a passive dispersive reflector (PDR) on the dynamical behaviour of a single mode diode laser. It is shown that the PDR enters the single mode equations via two specific functions of the carrier ...
  • Excitability of lasers with integrated dispersive reflector 
    TRONCIU, V. Z.; WUNSCHE, Hans-Juergen; SCHNEIDER, Klaus R.; RADZIUNAS, Mindaugas (Society of Photo-Optical Instrumentation Engineers (SPIE), 2001)
    This paper is concerned with the phenomenon of excitability in semiconductor lasers consisting of a DFB section and a passive dispersive reflector (PDR). We assume that the PDR section contains a Bragg grating and/or a ...
  • Experimental and numerical study of Distributed-Bragg-Reflector tapered lasers 
    FIEBIG, C.; TRONCIU, V. Z.; LICHTNER, M.; PASCHKE, K.; WENZEL, H. (Springer Nature Switzerland, 2010)
    We report results on experimental and numerical investigations of the output characteristics of edge-emitting distributed Bragg reflector tapered diode lasers emitting around 980 nm. The experimental results are well ...
  • Fabrication, characterization, and applications of high-performance AlGaAs-based buried-heterostructure diode lasers 
    SYRBU, Alexei V.; MEREUTZA, Alexandru Z.; SURUCEANU, Grigore I.; IACOVLEV, Vladimir P.; CALIMAN, Andrei N.; LUPU, Anatol T.; VIERU, Stanislav T.; PREDESCU, Marius; POPESCU, Ion M.; ISPASOIU, Radu G. (SPIE, 1996)
    Data are presented on buried-heterostructure (BH) AlGaAs/ GaAs and InGaAs/AlGaAs quantum-well diode lasers (DLs) fabricated by low-temperature liquid phase mesa melt etching and regrowth. The basic laser structures were ...
  • Feedback Sensitivity of Detuned DBR Semiconductor Lasers 
    TRONCIU, Vasile; WERNER, Nils; WENZEL, Hans; WÜNSCHE, Hans-Jürgen (IEEE, 2021)
    A distributed Bragg reflector (DBR) laser represents a simple realization of a semiconductor laser operating in a single longitudinal mode. We present a so far missing theoretical study how its reflection tolerance depends ...
  • Frenkel excitons and the energy bands structure in crystals PbGa2S4 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; PARVAN, V. I.; ZALAMAI, V. V. (Institutul de Fizică Aplicată al AŞM, 2012)
    On the basis of lead tiogalat (PbGa2S4) was created the active elements for lasers which allow to control the generation spectroscopic properties of lasers and parameters of the laser radiation. In these crystals were found ...
  • Guided mode lasing in ZnO nanorod structures 
    URSAKI, V. V.; ZALAMAI, V. V.; BURLACU, A.; FALLERT, J.; KLINGSHIRN, C.; KALT, H.; EMELCHENKO, G. A.; REDKIN, A. N.; GRUZINTSEV, A. N.; RUSU, E. V.; TIGINYANU, I. M. (ELSEVIER, 2009)
    Quasi-two-dimensional arrays of nearly parallel hexagonal ZnO nanorods and a three-dimensional cylindrical microstructure consisting of ZnO nanorods have been grown by low pressure chemical vapor deposition (CVD) and ...
  • Improvement of output beam quality in broad area lasers with off-axis feedback 
    LICHTNER, Mark; TRONCIU, Vasile; VLADIMIROV, Andrei (Leibniz-Institut im Forschungsverbund, Berlin, 2011)
    We report a method to improve the beam quality of broad area lasers by using a Vshaped external cavity formed by two off-axis feedback mirrors that allow to select a single transverse mode with the intensity modulated in ...

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