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Related Concept Videos

Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Self-pumped phase-conjugate diode-pumped Nd:YAG loop resonator.

P Sillard, A Brignon, J P Huignard

    Optics Letters
    |December 19, 2007
    PubMed
    Summary

    We developed a self-pumped phase-conjugate diode-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) loop resonator. This resonator achieves self-Q-switching and operates in a stable, diffraction-limited mode, even with aberrations.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nonlinear Optics

    Background:

    • Diode-pumped solid-state lasers are crucial for various applications.
    • Phase-conjugate resonators offer unique beam control properties.
    • Self-Q-switching can enhance laser pulse characteristics.

    Purpose of the Study:

    • To demonstrate a self-pumped phase-conjugate diode-pumped Nd:YAG loop resonator.
    • To investigate its self-Q-switching capability and mode stability.
    • To achieve high-energy, short-pulse output.

    Main Methods:

    • Utilizing a self-pumped phase-conjugate loop resonator configuration.
    • Employing a diode-pumped Nd:YAG gain medium.
    • Incorporating a low-refractive-index output coupler for self-starting operation.

    Main Results:

    • Achieved a maximum phase-conjugate reflectivity of 32 in the injected configuration.
    • Observed self-Q-switching, resulting in ~30 ns output pulses.
    • Demonstrated stable, diffraction-limited TEM(00) mode operation despite intracavity aberrations.
    • Measured a maximum output energy of 5.5 mJ in a 20-ns single-longitudinal-mode pulse.

    Conclusions:

    • The self-pumped phase-conjugate Nd:YAG loop resonator is a viable and robust laser architecture.
    • The resonator exhibits efficient self-Q-switching and self-starting capabilities.
    • It maintains excellent beam quality even under challenging intracavity conditions, enabling high-energy pulsed output.