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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Pulsed degenerate optical parametric oscillator based on a nonlinear-fiber Sagnac interferometer.

D K Serkland, G D Bartolini, A Agarwal

    Optics Letters
    |December 19, 2007
    PubMed
    Summary

    This study demonstrates an all-fiber optical parametric oscillator that generates compressed, ultrashort pulses. The fiber amplifier acts as a pulse compressor, improving spectral symmetry and reducing the time-bandwidth product.

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    Area of Science:

    • Nonlinear optics
    • Fiber optics
    • Laser physics

    Background:

    • Optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
    • Fiber-based parametric amplifiers offer broad bandwidths for nonlinear optical processes.

    Purpose of the Study:

    • To report the operation of an all-fiber degenerate optical parametric oscillator.
    • To investigate its performance as a pulse compressor.

    Main Methods:

    • Utilized a nonlinear-fiber Sagnac interferometer as a parametric amplifier.
    • Employed synchronous pumping with picosecond pulses at 1544 nm.

    Main Results:

    • Achieved 0.83-ps output pulses from 3.9-ps pump pulses, demonstrating pulse compression.
    • Observed improved spectral symmetry and reduced time-bandwidth product in output pulses.
    • Identified group-velocity dispersion as a limiting factor for further pulse width reduction.

    Conclusions:

    • The all-fiber OPO functions effectively as a pulse compressor due to the amplifier's wide bandwidth.
    • Suggests potential for frequency conversion using similar pulsed OPOs operating away from degeneracy.