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Updated: Jul 8, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Phase-matched self-doubling optical parametric oscillator.

T Kartalo Lu, K G Köprülü, O Aytür

    Optics Letters
    |March 1, 1997
    PubMed
    Summary
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    We developed a novel optical parametric oscillator using a single crystal for efficient frequency doubling. This laser system achieves tunable green light output with high power conversion efficiency.

    Area of Science:

    • Nonlinear optics
    • Laser physics
    • Materials science

    Background:

    • Optical parametric oscillators (OPOs) are versatile laser sources.
    • Intracavity frequency conversion enhances efficiency.
    • Potassium titanyl phosphate (KTiOPO4) is a widely used nonlinear crystal.

    Purpose of the Study:

    • To demonstrate a synchronously pumped intracavity frequency-doubled optical parametric oscillator.
    • To utilize a single KTiOPO4 crystal for both parametric generation and frequency doubling.
    • To achieve efficient and tunable green light generation.

    Main Methods:

    • Synchronous pumping of an optical parametric oscillator with a femtosecond Ti:sapphire laser.
    • Employing a single KTiOPO4 crystal for both OPG and SFG.

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  • Utilizing angle and pump wavelength tuning for output control.

    • Main Results:

    • Achieved a green output beam at 540 nm.
    • Obtained a 29% power conversion efficiency.
    • Demonstrated output tunability from 530-585 nm.

    Conclusions:

    • A single KTiOPO4 crystal can efficiently perform both OPG and SFG in an intracavity configuration.
    • The developed OPO offers a tunable source of green light with high efficiency.
    • This approach simplifies the system design and enhances performance.