Laser Spectroscopy Group

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   Obiective generale:

- Dezvoltarea de sisteme experimentale pentru generarea si controlul comportarii haotice a laserilor cu semiconductori si punerea la punct de modele numerice dedicate. Cresterea competitivitatii cercetarii romanesti in domeniul studiului haosului generat de sisteme laser cu cavitate externa in vederea dezvoltarii de tehnologii cu potential de aplicare in transmiterea codificata de informatie.

   Obiectivele specifice ale proiectului sunt:

 Experimentale:
 a) proiectarea, realizarea si caracterizarea unui montaj experimental (sistem LSCE) de obtinere a
emisiei laser haotice controlata prin modulare a curentului de injecţie (CI) si electro-optica (EO);
 b) proiectarea, realizarea si caracterizarea unui montaj de sincronizare haotica a doua sisteme
LSCE cuplate optic;
 c) caracterizarea radiatiei laser haotice emise de sistemele LSCE;
 d) identificarea unei metode experimentale de sincronizare haotica cu potential de aplicare in
transmiterea codata de informatie pe purtatoare haotica;
 e) realizarea unei monturi (subansamblu a sistemului LSCE) specializata de control al
feedbackului optic in cavitatea externa;
 Simulare:
 f) modelarea comportării haotice a emisiei sistemelor LSCE in conditii de control prin modulare;
 g) modelarea sincronizarii haotice a doua sisteme LSCE si a codarii si transmiterii codate de
informatie;

Rezultate:

::Etapa 1:: ::Etapa 2:: ::Etapa 3:: :Etapa 4::

Articole:

Anul 2010

- Chaotic behaviour in the emission of semiconductor lasers optically coupled with an external cavity; I.R. Andrei, C. Ticos, M. Bulinski, M.L. Pascu JOAM, Vol. 12, No. 1, p. 63-67, 2010;

- Characterization of chaotic emission of a laser diode in optical feedback conditions produced by different external reflectors, I.R. Andrei, OAM- Rapid Communications vol. 4, No. 10, 2010.

Anul 2011

- Experimental control of power dropouts by current modulation in a semiconductor laser with optical feedback, C.M. Ticos, I.R. Andrei, M.L. Pascu, M. Bulinski, Physica Scripta, Vol. 83, 055402 p. 4, 2011.

1 articol propus spre publicare:

- Phase synchronization of LFF in a multimode ECSL system under phase modulation, M. Bulinski, I.R. Andrei, C.M. Ticos, M.L. Pascu, propus spre publicare in Physics Letters A;

Carti:

- Capitolul 9 din “Modelare si Simulare – aplicatii in OSPL”: “Dinamica sistemelor laser” - Teoria semiclasica, Ecuatiile de baza pentru laserul auto-pulsat, Solutiile de dinamica haotica, Dioada laser cu cavitate extinsa”, pag. 204-223, Mircea Bulinski, Editura Universitatii Bucuresti (2011)

Conferinte:

Anul 2009

- Chaotic properties of the laser beams emitted by semiconductor lasers , I..R. Andrei, M. Bulinski, C.M. Ticos, M.L. Pascu, The 2009 Scientific Communications Session of Physics Faculty, University of Bucharest, Bucharest, Romania, 5 June 2009.

- Chaotic behaviour of semiconductor lasers emission when optically coupled with an external cavity (poster), I. R. Andrei, C. M. Ticos, M. Bulinski, M. L. Pascu, Micro- to Nano-Photonics II - ROMOPTO 2009, Sibiu, Romania, 31 August - 3 Septembrie 2009.

Anul 2010

- Effects of the reflector type on the external-cavity semiconductor laser emission, I.R.Andrei, C.M. Ticos, M.Bulinski, M.L. Pascu, The 2010 Scientific Communications Session of Physics Faculty, University of Bucharest, Bucharest, Romania, 18 June 2010;

- Characterization of chaotic emission of a laser diode for selective and unselective optical feedback produced by external reflectors, I.R. Andrei, C.M. Ticos, M. Bulinski, M.L. Pascu, International Student Workshop on Laser Applications 2010 (ISWLA10), Bran, Romania, May 25-28, 2010;

- Chaotic behaviour and control of a semiconductor laser, M. Bulinski, International Student Workshop on Laser Applications 2010 (ISWLA10), Bran , Romania , May 25-28, 2010;

Anul 2011

- T he experimental analyse of chaotic synchronization of two coupled external-cavity semiconductor lasers , I.R.Andrei , C.M. Ticos, M.Bulinski, G.V. Popescu, M.L. Pascu, The 2011 Scientific Communications Session of Physics Faculty, University of Bucharest, Bucharest, Romania, 17 June 2011;

- Experimental control of the LFF frequency by current modulation in a semiconductor laser with optical feedback” (prezentare orala) , I.R. Andrei , C.M. Ticos, M. Bulinski, M.L. Pascu, International Student Workshop on Laser Applications 2011 (ISWLA11), Bran, Romania, May 31 – June 4 , 2011;

- Experimental analysis of chaotic coupling of two lasers with external optical feedback (poster) , I.R. Andrei , C.M. Ticos, M. Bulinski, M.L. Pascu, International Student Workshop on Laser Applications 2011 (ISWLA11), Bran, Romania, May 31 – June 4 , 2011;