List of publications

• V. Tronciu, S. Schwertfeger, M. Radziunas, A. Klehr, U. Bandelow, H. Wenzel, ''Amplifications of picosecond laser pulses in tapered semiconductor amplifiers: Numerical simulations versus experiments'', to appear in Opt. Communications, 2012. WIAS-Preprint 1657, 2011.
• M. Radziunas, K. Staliunas, ''Spatial rocking in broad area semiconductor lasers'', Europhysics Letters, 95 14002 (6pp), 2011. WIAS-Preprint, (1598).
• M. Radziunas, A.G. Vladimirov, E.A. Viktorov, G. Fiol, H. Schmeckebier, D. Bimberg, ''Pulse broadening in quantum-dot mode-locked semiconductor lasers: simulation, analysis and experiments'', IEEE J Quantum Elect., 47(7), pp. 935-943, 2011. WIAS-Preprint, (1584).
• M. Radziunas, K.-H. Hasler, B. Sumpf, Tran Quoc Tien, H. Wenzel, ''Mode transitions in DBR semiconductor lasers: Experiments, simulations and analysis'', J. Phys. B: At. Mol. Opt. Phys. 44, art. no. 105401, 2011. WIAS-Preprint, (1513).
• M. Radziunas, A.G. Vladimirov, E.A. Viktorov, G. Fiol, H. Schmeckebier, D. Bimberg, ''Strong pulse asymmetry in quantum-dot mode-locked semiconductor lasers'', Appl. Phys. Lett., 98, art. no. 031104, 2011. WIAS-Preprint, (1579).
• R. Čiegis, M. Radziunas, ''Effective Numerical Integration of Traveling Wave Model for Edge-Emitting Broad-Area Semiconductor Lasers and Amplifiers'', Math. Model. Anal. 15(4), pp. 409-430, 2010.
• V.Z. Tronciu, M. Lichtner, M. Radziunas, U. Bandelow, H. Wenzel, ''Improving the stability of distributed-feedback tapered master-oscillator power-amplifiers'', Optical and Quantum Electronics, 41(7), pp. 531-537, 2009. WIAS-Preprint, (1444).
• R. Čiegis, I. Laukaitytė, M. Radziunas, ''Numerical algorithms for Schrödinger equation with artificial boundary conditions'', Num. Funct. Anal. and Optimization, 30(9-10), pp. 903-923, 2009. WIAS-Preprint, (1446).
• A. Jechow, M. Lichtner, R. Menzel, M. Radziunas, D. Skoczowsky, A. Vladimirov, ''Stripe-array diode-laser in an off-axis external cavity: Theory and experiment'', Optics Express, 17(22), pp. 19599-19604, 2009. WIAS-Preprint, (1442).
• M. Spreemann, M. Lichtner, M. Radziunas, U. Bandelow, H. Wenzel, ''Measurement and Simulation of Distributed-Feedback Tapered Master-Oscillators Power-Amplifiers'', IEEE J. of Quantum Electronics, 45(6), pp. 609-616, 2009.
• M. Radziunas, V.Z. Tronciu, U. Bandelow, M. Lichtner, M. Spreemann, H. Wenzel, ''Mode transitions in distributed-feedback tapered master-oscillator power-amplifier'', Optical and Quantum Electronics, 40(14-15), pp. 1103-1109, 2008. WIAS-Preprint, (1366).
• R. Ciegis, M. Radziunas, M. Lichtner, ''Numerical algorithms for simulation of multisection lasers by using traveling wave model'', Math. Model. Anal. 13(3), pp. 327-348, 2008. pdf file.
• D. Turaev, M. Radziunas, A. Vladimirov, ''Chaotic soliton walk in periodically modulated media'', Phys. Rev. E, 77(1), art. no. 065201(R), 2008. WIAS-Preprint, (1262).
• O.V. Ushakov, N. Korneyev, M. Radziunas, H.-J. Wünsche, F. Henneberger, ''Excitability of chaotic transients in a semiconductor laser'', Europhysics Letters, 79 30004 (5pp), 2007. pdf file.
• M. Lichtner, M. Radziunas, L. Recke, ''Well posedness, smooth dependence and center manifold reduction for a semilinear hyperbolic system from laser dynamics'', Mathematical Methods in Applied Sciences, 30(8), pp. 931-960, 2007.
• M. Radziunas, A. Glitzky, U. Bandelow, M. Wolfrum, U. Troppenz, J. Kreissl, W. Rehbein, ''Improving the modulation bandwidth in semiconductor lasers by passive feedback'', IEEE J. of Selected Topics of Quantum Electronics, 13(1), pp. 136-142, 2007. WIAS-Preprint (1149).
• T. Perez, M. Radziunas, H.-J. Wünsche, C.R. Mirasso, F. Henneberger, ''Synchronization properties of two coupled multisection semiconductor lasers emitting chaotic light'', Phot. Techn. Lett., 18(20), pp. 2135-2137, 2006. pdf file.
• U. Bandelow, M. Radziunas, A. Vladimirov, B. Hüttl, R. Kaiser, "Harmonic Mode-Locking in Monolithic Semiconductor Lasers: Theory, Simulations and Experiment", Optical and Quantum Electronics 38, pp. 495-512, 2006. WIAS-Preprint, (1039).
• B. Hüttl, R. Kaiser, Ch. Kindel, S.Fiddora, W. Rehbein, H. Stolpe, G. Sahin, U. Bandelow, M. Radziunas, A. Vladimirov, H. Heidrich, " Experimental investigations on the suppression of Q-switching in monolithic 40 GHz mode-locked semiconductor lasers", Appl. Phys. Lett. 88, art. no. 221104, 2006. WIAS-Preprint, (1112).
• V.Z. Tronciu, H.-J. Wünsche, M. Wolfrum, M. Radziunas, "Semiconductor laser under resonant feedback from a Fabry-Perot resonator: Stability of continuous wave operation", Phys. Rev. E 73, art. no. 046205, 2006. WIAS-Preprint, (1051).
• M. Radziunas, ''Numerical bifurcation analysis of traveling wave model of multisection semiconductor lasers'', Physica D, 213(1), pp. 98-112, 2006. WIAS-Preprint, (985).
• M. Radziunas, F. Ivanauskas, "The convergence and stability of splitting finite difference schemes for nonlinear evolutionary type equations", Lith. Math. Journal, 45(3), pp. 413-434, 2005. WIAS-Preprint, (464).
• N. Nefedov, M. Radziunas, K. Schneider, A. Vasil'eva, ''Change of the type of contrast structures in parabolic Neumann problems'', Comp. Math. and Math. Physics 45(1), pp. 37-51, 2005. WIAS-Preprint, (984).
• N. Nefedov, M. Radziunas, K. Schneider, ''Analytic-numerical investigation of delayed exchange of stabilities in singularly perturbed parabolic problems'', Comp. Math. and Math. Physics 44(7), pp. 1213-1220, 2004. WIAS-Preprint, (839).
• S. Bauer, O. Brox, J. Kreissl, B. Sartorius, M. Radziunas , J. Sieber, H.-J. Wünsche, F. Henneberger ''Nonlinear Dynamics of Semiconductor Lasers with Active Optical Feedback'', Phys. Rev. E 69,art. no. 016206, 2004. WIAS-Preprint, (866).
• J. Sieber, M. Radziunas, K. Schneider, ''Dynamics of multisection semiconductor lasers'', Math. Model. Anal. 9(1), pp. 51-66, 2004. pdf file.
• H.-J. Wünsche, M. Radziunas, S. Bauer, O. Brox, B. Sartorius, "Simulation of Phase-Controlled Mode-Beating Lasers", IEEE J Selected Topics of Quantum Electron. 9(3), pp. 857-864, 2003. WIAS-Preprint, (809).
• O. Brox, S. Bauer, M. Radziunas , M. Wolfrum, J. Sieber, J. Kreissl, B. Sartorius, H.-J. Wünsche, ''High-Frequency Pulsations in DFB-Lasers with Amplified Feedback'', IEEE J Quantum Elect., 39(11), pp. 1381-1387, 2003. WIAS-Preprint (849).
• H.-J. Wünsche, O. Brox, M. Radziunas, F. Henneberger, "Excitability of a semiconductor laser by a two-mode homoclinic bifurcation", Phys. Rev. Lett. 88(2), art. no. 023901, 2002. pdf file.
• M. Möhrle, B. Sartorius, C. Bornholdt, S. Bauer, O. Brox, A. Sigmund, R. Steingrüber, M. Radziunas, H.-J. Wünsche, "Detuned grating multisection-RW-DFB lasers for high-speed optical signal processing", IEEE J Selected Topics of Quantum Electron. 7(2), pp. 217-223, 2001. pdf file.
• U. Bandelow,M. Radziunas, J. Sieber, M. Wolfrum, "Impact of gain dispersion on the spatio-temporal dynamics of multisection lasers", IEEE J Quantum Elect. 37(2), pp. 183-188, 2001. WIAS-Preprint 597 .
• M. Radziunas, H.-J. Wünsche, B. Sartorius, O. Brox, D. Hoffmann, K. Schneider, D. Marcenac, "Modeling self-pulsating DFB lasers with an integrated phase tuning section", IEEE J Quantum Elect. 36(9), pp. 1026-1034, 2000. WIAS-Preprint 516 .
• F. Ivanauskas and M. Radziunas, "On Convergence and Stability of the Explicit Difference Method for Solution of Nonlinear Schrödinger Equations", SIAM J. Numer. Anal., 36(5), pp. 1466-1481, 1999. pdf file.
• M. Radziunas, F. Ivanauskas, ''The stability conditions of finite difference schemes for Schrödinger, Kuramoto-Tszuki and heat equations'', Math. Model. Anal. , 3, pp. 177-194, 1998. pdf file.
• R. Buzelis, A. Dementjev, Ye. Kosenko, E. Murauskas, R. Navakas, M. Radziunas, "Generation of Short Pulses with low Jitter in Combined Actively and Passively Q-Switched Nd:YAG Laser with short Resonator [in Russian]", Lithuanian J. of Physic, 38(3), pp. 286-297, 1998.
• F. Ivanauskas, M. Radziunas, ''The Convergence and Stability of the Explicit Difference Scheme for Nonlinear Schrödinger Equation'', Math. Model. Anal., 2, pp. 66-74, 1997. pdf file.
• F. Ivanauskas, M. Radziunas, "Stability and convergence of Du Fort-Frankel difference schemes for a nonlinear equation of Schrödinger type", Lithuanian Math. J., 37(3), pp. 249-263, 1997. pdf file.
• R. Buzelis, A. Dementjev, F. Ivanauskas, Ye. Kosenko, E. Murauskas, M. Radziunas, "Determination of Cross-Section of Passive Cr⁴⁺: GSGG and Cr⁴⁺: YAG Q-Switches at the Generation Wavelength of Nd:YAG Laser [in Russian]", Lithuanian J. of Physic, 37(4), pp. 291-298, 1997.
• M. Radziunas, "Convergence and stability of difference schemes for a system of nonlinear equations of Schrödinger type" [in Russian], Math. Model. Anal. , 1, pp. 53-55, 1996.
• M. Radziunas, "On Convergence and Stability of Difference Schemes for Nonlinear Schrödinger Type Equations", Lithuanian Math. J., 36(2), pp. 178-194, 1996. pdf file.
• R. Buzelis, R. Vaiciekauskas, A. Dement'jev, F. Ivanauskas, Ye. Kosenko, E. Murauskas, M. Radziunas, " Numerical Analysis and Experimental Investigation of Generation, SBS Compression and Amplification of ND: YAG Laser Short Pulses [in Russian]", Izv. Ros. Akad. Nauk, Ser. Fizika, 60, pp. 168-177, 1996.

• I. Laukaityte, R. Ciegis, M. Lichtner, M. Radziunas, ''Parallel numerical algorithm for the traveling wave model'', in Parallel Scientific Computing and Optimization. Springer Optimization and Its Applications, eds. R. Ciegis, D. Henty, B. Kagstrom and J. Zilinskas, Vol. 27, Springer, pp. 237-251, 2009. ISBN 978-0-387-09706-0.
• M. Radziunas, H.-J. Wünsche, ''Multisection Lasers: Longitudinal Modes and their Dynamics'', in Optoelectronic Devices - Advanced Simulation and Analysis, pp. 121-150, ed. J. Piprek, Springer Verlag, New York, 2005. ISBN: 0-387-22659-1 WIAS-Preprint, (939).

• M. Radziunas, K. Staliunas, "Spatial "rocking" in broad emission area semiconductor lasers", in Proc. of the CLEO Europe/EQEC Conference, CB5.2 WED, Munich, May 22-26, 2011. pdf file.
• M. Radziunas, A.G. Vladimirov, E.A. Viktorov, G. Fiol, H. Schmeckebier, D. Bimberg, "Strong asymmetry of mode-locking pulses in quantum-dot semiconductor lasers", in Proc. of the CLEO Europe/EQEC Conference, CB3.5 TUE, Munich, May 22-26, 2011. pdf file.
• M. Radziunas, A.G. Vladimirov, E. Viktorov, ''Traveling wave modeling, simulation and analysis of quantum-dot mode-locked semiconductor lasers'', in SPIE Proceedings Series, (7720), art. no. 77200X, 2010. WIAS-Preprint, (1506).
• A. Jechow, D. Skoczowsky, M. Lichtner, M. Radziunas, R. Menzel, "High-brightness emission from stripe-array broad area diode lasers operated in off-axis external cavities", in SPIE Proceedings Series, (7583), art. no. 758312, 2010.
• V.Z. Tronciu, M. Lichtner, M. Radziunas, U. Bandelow, H. Wenzel, "Dynamics and stability improvement of DFB tapered master-oscillator power-amplifiers", Proc. of the 6th International Conference on Microelectronics and Computer Science , Chisinau, Republic of Moldova, October 1-3, pp. 15-18, 2009. pdf file.
• V.Z. Tronciu, M. Lichtner, M. Radziunas, U. Bandelow, H. Wenzel, "Improving the stability of distributed-feedback tapered master-oscillator power-amplifiers", Proc. of the 9th Int. Conf. on Numerical Simulation of Optoelectronic Devices NUSOD 09 , J. Piprek, Yong-Tak Lee, eds., pp. 55-56, 2009. pdf file.
• M. Radziunas, A.G. Vladimirov, E. Viktorov, "Traveling wave modeling of mode-locked quantum dot semiconductor lasers", in Proc. of the CLEO Europe/EQEC Conference, CB4.4 TUE, Munich, June 14-19, 2009. pdf file.
• M. Radziunas, "Simulation of switching between stable unidirectional states in semiconductor ring lasers", in Proc. of the CLEO Europe/EQEC Conference, CB.P.12 TUE, Munich, June 14-19, 2009. pdf file.
• V.Z. Tronciu, M. Lichtner, M. Radziunas, U. Bandelow, H. Wenzel, "Calculation of improved features of distributed-feedback tapered master-oscillator power-amplifiers", in Proc. of the CLEO Europe/EQEC Conference, CB.P.30 TUE, Munich, June 14-19, 2009. pdf file.
• M. Radziunas, ''Traveling wave modeling of semiconductor ring lasers'', in SPIE Proceedings Series, (6997), art. no. 69971B, 2008. WIAS-Preprint, (1315).
• M. Lichtner, M. Radziunas, U. Bandelow, M. Spreemann, H. Wenzel, ''Dynamic simulation of high brightness semiconductor lasers'', 8th Int. Conf. on Numerical Simulation of Optoelectronic Devices NUSOD 08 , J. Piprek, E. Larkins, eds., Nottingham, UK, September 1-5, 2008. pdf file.
• J. Kreissl, U. Troppenz, W. Rehbein, T. Gaertner, P. Harde, M. Radziunas, ''40 Gb/s direct modulated passive feedback laser with complex-coupled DFB section'', in Proc. of the 33rd European Conf. on Optical Communications ECOC 2007, Vol. 3, pp 213-214, 8.1.4, Berlin, Germany, September 16-20 2007. pdf file.
• M. Radziunas, U. Troppenz, J. Kreissl, ''Tailoring single-mode DFB laser with integrated passive feedback section for direct modulation applications'', in Proc. of the CLEO Europe/IQEC Conference, CB-35-WED, Munich, June 17-22, 2007. pdf file.
• O. Ushakov, H-J. Wünsche, F. Henneberger, M.~Radziunas, ''Excitability of Chaotic Transients in a Semiconductor Laser'', in Proc. of the CLEO Europe/IQEC Conference, IG6-2-THU, Munich, June 17-22, 2007. pdf file.
• T. Perez, C.R. Mirasso, H-J. Wünsche, F. Henneberger, M.~Radziunas, I. Fischer, ''Synchronization of Chaotic Unidirectionally Coupled Multisection Lasers'', in Proc. of the CLEO Europe/IQEC Conference, JSI3-2-THU, Munich, June 17-22, 2007. pdf file.
• U. Troppenz, J. Kreissl, W. Rehbein, C. Bornholdt, T. Gaertner, M. Radziunas, A. Glitzky, U. Bandelow, M. Wolfrum, ''40 Gb/s directly modulated InGaAsP passive feedback DFB laser'', in ECOC Proceedings Series , Postdeadline session, paper Th 4.5.5, 2006. pdf file.
• T. Perez, M. Radziunas, H.-J. Wünsche, C.R. Mirasso, F. Henneberger, ''Chaos synchronization of unidirectionally coupled multisection lasers'', in ECOC Proceedings Series , CLEO Focus Meeting on Chaotic Optical Systems and Applications, paper Tu 3.1.5, 2006. pdf file.
• M. Radziunas, H.-J. Wünsche, B. Krauskopf, M. Wolfrum, " External cavity modes in Lang-Kobayashi and traveling wave models", in SPIE Proceedings Series, (6184), art. no. 61840X, 2006. WIAS-Preprint, (1111).
• M. Radziunas, U. Bandelow, M. Wolfrum, U. Troppenz, J. Kreissl, A. Glitzky, R. Hünlich, ''Design of multisection laser for 40 Gb/s direct modulation'', in Proc. of the 31st European Conf. on Optical Communications ECOC 2005, Vol. 3, pp 677-678, We4.P.088, Glasgow, UK, September 25-29 2005. pdf file.
• V.Z. Tronciu, M. Radziunas, H.-J. Wünsche, M. Wolfrum, ''Resonant coupling of a semiconductor laser to a Fabry-Perot resonator'', in Proc. of the European Quantum Electronics Conference, EQEC'05, EA5-2-TUE, art. no. 1567197, pp. 25, 2005.
• M. Radziunas, ''Tailoring the dynamics of multisection lasers for 40 Gb/s direct modulation'', in Proc. of the 5th Int. Conf. on Numerical Simulation of Optoelectronic Devices NUSOD 05 (ed. H.-J. Wünsche, J. Piprek, U. Bandelow, H. Wenzel), pp 29-30, Berlin, Germany, September 19-22 2005. IEEE Catalog Number: 05EX1074. pdf file.
• U. Troppenz, M. Hamacher, M. Radziunas, H. Heidrich, ''Optical switching of clokwise/anti-clokwise lasing in bus coupled microrings'', in Proc. of the 17th Int. Conf. on Indium Phosphide and Related Materials IPRM 05 (ed. I. Thayne, J. Marsh, C. Bryce), Glasgow, Scotland, UK, May 8-12 2005. IEEE Catalog Number: 05CH37633C. pdf file.
• N. Korneyev, M. Radziunas, H.-J. Wünsche, F. Henneberger, ''Mutually injecting semiconductor lasers: simulations for short and zero delay'', in SPIE Proceedings Series, (5452), pp. 63-70, 2004. pdf file.
• S. Bauer, O. Brox, M. Biletzke, J. Kreissl, M. Radziunas, B. Sartorius, H.-J. Wünsche, ''Speed potential of active feedback lasers'', in Proc. of the CLEO Europe Conference, Munich, June 22-27, 2003. art. no. 1312237, pp. 176, 2003.
• U. Bandelow, M. Radziunas, ''Simulation of mode-locked lasers with LDSL-tool'', in Proc. of the CLEO Europe Conference, Munich, June 22-27, 2003. INSPEC Accession Number: 8142863
• N. Korneyev, M. Radziunas, H.-J. Wünsche, F. Henneberger, ''Bifurcations of a DFB Laser with Short Optical Feedback: Numerical Experiment'', in SPIE Proceedings Series, (4986), pp. 480-489, 2003. pdf file.
• M. Radziunas, H.-J. Wünsche, ''LDSL: a tool for simulation and analysis of longitudinal dynamics in multisection semiconductor laser'', in Proceedings of 2nd International Conference on Numerical Simulations of Optoelectronic Devices (NUSOD-02), Zürich, pp. 26-27, 2002. pdf file.
• M. Radziunas, H.-J. Wünsche, ''Dynamics of multisection DFB semiconductor laser: traveling wave and mode approximation models'', in SPIE Proceedings Series, (4646), pp. 27-37, 2002. WIAS-Preprint 713 .
• M. Radziunas, H.-J. Wünsche, O. Brox, F. Henneberger, ''Excitability of a DFB laser with short external cavity'', in SPIE Proceedings Series, (4646), pp. 420-428, 2002. WIAS-Preprint 712 .
• V.Z. Tronciu, H.-J. Wünsche, M. Radziunas, K. Schneider, ``Excitability of laser with integrated dispersive reflectors'', in SPIE Proceedings Series, (4283), pp.347-354, 2001. WIAS-Preprint 631 .
• H.-J. Wünsche, M. Radziunas, H.-P. Nolting, ''Modeling of devices for all-optical 3R-regeneration'', in Integrated Photonics Research, vol. 58 of Trends in Optics and Photonics, Washington, pp. IWA 1-3, 2001. pdf file.
• U. Bandelow, M. Radziunas, V. Tronciu, H.-J. Wünsche, F. Henneberger, ''Tailoring the dynamics of diode lasers by dispersive reflectors'', in SPIE Proceedings Series, (3944), pp. 536-545, 2000. pdf file.
• M. Möhrle, B. Sartorius, C. Bornholdt, S. Bauer, O. Brox,A. Sigmund, M. Radziunas, H.-J. Wünsche, ''Detuned grating multi-section-RW-DFB-lasers for high speed opticalsignal processing'', in 17th International Semiconductor Laser Conference Digest, Monterey, CA, pp. 143-144, 2000. ISBN: 0-7803-6259-4
• M. Radziunas, H.-J. Wünsche, B. Sartorius, H.-P. Nolting, K. Schneider, O. Brox and D. Hoffmann, ''Modeling of new grating designs for self-pulsating DFB lasers'', in Integrated Photonics Research, OSA Technical Digest, Optical Society of America, Washington DC, pp. 358-360, 1999. pdf file.

• M. Lichtner, M. Radziunas, ''Well posedness and smooth dependence for a semilinear hyperbolic system with nonsmooth data'', Preprint of DFG Research Center Matheon, (174), 2004.
• M. Radziunas, ''Sampling techniques applicable for the characterization of the quality of self pulsations in semiconductor lasers'', WIAS-Technical Report, (2), 2002.

• M. Radziunas, "Some Aspects in the Solution of the Boundary Value Problems for one Equation of Gas Dynamics", Master Thesis, Moscow State University, 1992.
• M. Radziunas, "The Investigation of Evolutionary Type Equations", PhD Thesis, Vilnius University, Lithuania, 1996.