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Related Concept Videos

Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
Design Example: Underdamped Parallel RLC Circuit01:17

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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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Off-axis unstable laser resonator: operation.

E A Phillips, J P Reilly, D B Northam

    Applied Optics
    |February 19, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an off-axis unstable laser resonator to enlarge uniform illumination areas without sacrificing output power or beam quality. Resonator performance proved sensitive to misalignment, highlighting the need for precision in this novel laser configuration.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Experimental Laser Science

    Background:

    • Traditional laser resonators often have limitations in achieving large uniform illumination areas.
    • Optimizing laser resonator design is crucial for various applications requiring high-intensity uniform flux.
    • Unstable resonators offer potential for high output power but require careful design for beam uniformity.

    Purpose of the Study:

    • To investigate a novel unstable laser resonator configuration designed to maximize the uniform illumination area.
    • To assess the impact of displacing the optical axis on laser device output power and beam quality.
    • To evaluate the sensitivity of the off-axis resonator's performance to misalignment.

    Main Methods:

    • Experimental setup of a novel unstable laser resonator with an off-axis optical axis.
    • Measurement of output power and beam quality for the modified resonator configuration.
    • Systematic investigation of resonator performance under varying degrees of misalignment.

    Main Results:

    • The off-axis configuration successfully maximized the uniform illumination area without significant loss of output power.
    • Beam quality was minimally affected by the displacement of the optical axis.
    • Resonator performance demonstrated high sensitivity to misalignment of the off-axis optical axis.

    Conclusions:

    • The novel off-axis unstable laser resonator is an effective method for increasing uniform illumination areas.
    • The configuration maintains high output power and beam quality, making it suitable for demanding applications.
    • Precise alignment is critical for optimal performance of this off-axis resonator design.