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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Tunable superradiant emission from a planar dye laser.

P Burlamacchi, R Pratesi, U Vanni

    Applied Optics
    |February 19, 2010
    PubMed
    Summary

    A novel dye laser tuning method uses a thin Rhodamine 6G cell for tunable, stable laser output. This simple, scalable design achieves narrow linewidths without a resonant cavity.

    Area of Science:

    • Physics
    • Optics
    • Laser Technology

    Background:

    • Superradiant dye lasers offer tunable output but often lack stability.
    • Achieving narrow linewidths and high stability in dye lasers can be challenging.

    Purpose of the Study:

    • To report a new, simple scheme for tuning a double-pass, superradiant dye laser.
    • To demonstrate stable, tunable laser output with a narrow linewidth.

    Main Methods:

    • Utilized a planar cell with a thickness below 100 microm, filled with a concentrated Rhodamine 6G solution.
    • Employed flashlamp pumping and incorporated frequency-dispersive feedback elements.
    • Operated without a resonant cavity to avoid modal structures.

    Main Results:

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    • Measured an unsaturated gain of 1.7 cm(-) and operated in a well-saturated regime.
    • Achieved smooth laser linewidths from 10 nm (broadband) to 8 GHz (narrowband).
    • Observed a 5-GHz output with a 25-microm gap cell, demonstrating frequency and intensity stability.

    Conclusions:

    • The reported scheme provides a simple and effective method for tuning superradiant dye lasers.
    • The absence of a resonant cavity enhances frequency and intensity stability.
    • The configuration is scalable for higher output energy and allows simultaneous two-wavelength operation.