General theory for spontaneous emission in active dielectric microstructures: Example of a fiber amplifier

Thomas Søndergaard, Bjarne Tromborg

    Research output: Contribution to journalJournal articleResearchpeer-review

    558 Downloads (Pure)

    Abstract

    A model for spontaneous emission in active dielectric microstructures is given in terms of the classical electric field Green's tensor and the quantum-mechanical operators for the generating currents. A formalism is given for calculating the Green's tensor, which does not rely on the existence of a complete power orthogonal set of electromagnetic modes, and the formalism may therefore be applied to microstructures with gain and/or absorption. The Green's tensor is calculated for an optical fiber amplifier, and the spontaneous emission in fiber amplifiers is studied with respect to the position, transition frequency, and vector orientation of a spatially localized current source. Radiation patterns are studied using a Poynting vector approach taking into account amplification or absorption from an active medium in the fiber.
    Original languageEnglish
    JournalPhysical Review A
    Volume64
    Issue number3
    Pages (from-to)033812
    ISSN2469-9926
    DOIs
    Publication statusPublished - 2001

    Bibliographical note

    Copyright (2001) American Physical Society

    Keywords

    • SPONTANEOUS DECAY
    • KRAMERS-KRONIG DIELECTRICS
    • HERMITIAN OPTICAL-SYSTEMS
    • EXCESS SPONTANEOUS EMISSION
    • QUANTUM ELECTRODYNAMICS
    • PLANAR CAVITIES
    • ENHANCED SPONTANEOUS EMISSION
    • SEMICONDUCTOR-LASERS
    • INHIBITED SPONTANEOUS EMISSION
    • ELECTROMAGNETIC-FIELD

    Fingerprint

    Dive into the research topics of 'General theory for spontaneous emission in active dielectric microstructures: Example of a fiber amplifier'. Together they form a unique fingerprint.

    Cite this