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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Threshold gain in aperiodic lattice lasers.

Thomas G Folland, Li Hua, Subhasish Chakraborty

    Optics Express
    |January 7, 2017
    PubMed
    Summary

    Aperiodic lattices enable tunable multi-frequency lasing by controlling the photon density of states. These lasers demonstrate robust spectral control and are resilient to fabrication imperfections.

    Area of Science:

    • Photonics and optical engineering
    • Materials science

    Background:

    • Aperiodic lattices offer potential for tunable or multi-frequency lasing.
    • The spectral properties of aperiodic lattices, particularly at threshold, are not well understood.

    Purpose of the Study:

    • To investigate the threshold spectral response of holographically designed aperiodic lattices.
    • To explore the potential for multi-frequency lasing in these structures.

    Main Methods:

    • Holographic design of aperiodic lattices.
    • Analysis of spectral response under facet feedback.
    • Investigation of photon density of states.

    Main Results:

    • Aperiodic lattices exhibit a multimode spectral response with both defect and band-edge photonic states.

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  • Remarkable spectral control at multiple frequencies across a wide bandwidth is maintained under facet feedback.
  • Enhanced photon density of states at designed frequencies reduces laser mode thresholds.

    • Conclusions:

    • Aperiodic lattice lasers provide tunable multi-frequency lasing capabilities.
    • The observed spectral control is attributed to enhanced photon density of states.
    • These lasers show robustness against fabrication imperfections, supported by prior experimental work.