Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloCoupled Mode Theory: a Powerful Tool for Analyzing Complex VCSELs and Designing Advanced Devices Features
Anno di pubblicazione2003
Formato-
Autore/iP. Debernardi, G. P. Bava
Affiliazioni autori1 CNR, 2 Politecnico di Torino
Autori CNR e affiliazioni
  • PIERLUIGI DEBERNARDI
Lingua/e-
AbstractVertical-cavity surface-emitting lasers (VCSELs) have become leading light sources in plenty of applications due to their good characteristics and low costs. There are, however, some features that need improvements; therefore, optimized or new designs ideas are necessary. To this aim, an electromagnetic simulation tool, which is fast and precise at the same time, is desirable; to cover all the possible requirements, it should be fully three-dimensional (3-D) and vectorial. A model with such features was first proposed by Bava et al. (“Three-Dimensional Model for Vectorial Fields in Vertical-Cavity Surface-Emitting Lasers,” Phys. Rev. A, vol. 63, p. 23816, 2001), based on coupled-mode theory. Here, a review of its applications will be given, related to particular devices: nonperfectly circular VCSELs and phase-coupled arrays. The comparison with the corresponding experimental results turns out to be very satisfactory. Therefore, we were encouraged to use the model for obtaining design criteria of polarization maintaining VCSELs by using a small relief grating. The capability of gratings to pin the VCSEL polarization was already demonstrated; however, the different configurations do not allow one to have a clear overview of this technique. Moreover, to the best of our knowledge, a full simulation of a VCSEL with a grating was never presented, due to the complexity of treating the corresponding fully 3-D and vectorial problem. For the first time, we have the possibility of comparing different configurations on the same footing; in particular, we will evaluate the performances of dielectric and metal gratings. With the design we propose here, single-transverse and single-polarization-mode operation are predicted with a suppression of the other polarization easily in the order of 45 dB.
Lingua abstract-
Altro abstract-
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Pagine da905
Pagine a917
Pagine totali-
RivistaIEEE journal of selected topics in quantum electronics
Attiva dal 1995
Editore: IEEE, - New York, NY
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 1077-260X
Titolo chiave: IEEE journal of selected topics in quantum electronics
Titolo proprio: IEEE journal of selected topics in quantum electronics
Titolo abbreviato: IEEE j. sel. top. quantum electron.
Titolo alternativo: Selected topics in quantum electronics
Numero volume della rivista9
Fascicolo della rivista-
DOI-
Verificato da referee-
Stato della pubblicazione-
Indicizzazione (in banche dati controllate)-
Parole chiaveVCSEL models, Anisotropies, laser arrays, polarization control, gratings
Link (URL, URI)-
Titolo parallelo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IEIIT — Istituto di elettronica e di ingegneria dell'informazione e delle telecomunicazioni
Moduli CNR-
Progetti Europei-
Allegati

    Dati storici
    I dati storici non sono modificabili, sono stati ereditati da altri sistemi (es. Gestione Istituti, PUMA, ...) e hanno solo valore storico.
    Area disciplinareInformation Technology & Communications Systems
    Rivista ISIIEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS [11536J0]
    Descrizione sintetica del prodottoVertical-cavity surface-emitting lasers (VCSELs) have become leading light sources in plenty of applications due to their good characteristics and low costs. There are, however, some features that need improvements; therefore, optimized or new designs ideas are necessary. To this aim, an electromagnetic simulation tool, which is fast and precise at the same time, is desirable; to cover all the possible requirements, it should be fully three-dimensional (3-D) and vectorial. A model with such features was already proposed and the comparison with the corresponding experimental results turns out to be very satisfactory. Therefore, we were encouraged to use the model for obtaining design criteria of polarization maintaining VCSELs by using a small relief grating. The capability of gratings to pin the VCSEL polarization was already demonstrated; however, the different configurations do not allow one to have a clear overview of this technique. Moreover, to the best of our knowledge, a full simulation of a VCSEL with a grating was never presented, due to the complexity of treating the corresponding fully 3-D and vectorial problem. For the first time, we have the possibility of comparing different configurations on the same footing; in particular, we will evaluate the performances of dielectric and metal gratings.