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Related Concept Videos

MOSFET Amplifiers01:17

MOSFET Amplifiers

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The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
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Updated: Mar 3, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Compact, high-power, high-beam-quality quasi-CW microsecond five-pass zigzag slab 1319  nm amplifier.

Chuan Guo, Junwei Zuo, Qi Bian

    Applied Optics
    |April 22, 2017
    PubMed
    Summary
    This summary is machine-generated.

    We developed a compact, high-power quasi-continuous-wave (QCW) Nd:YAG slab amplifier laser at 1319 nm. This novel multi-pass zigzag design achieves excellent beam quality and high output power for advanced laser applications.

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    Area of Science:

    • Lasers and Optics
    • Materials Science

    Background:

    • Nd:YAG lasers are crucial for various applications.
    • Developing high-power, compact laser systems remains a challenge.

    Purpose of the Study:

    • To demonstrate a novel compact, high-power, quasi-continuous-wave (QCW) end-pumped 1319 nm Nd:YAG slab amplifier laser.
    • To achieve good beam quality in a multi-pass zigzag architecture.

    Main Methods:

    • Utilized a QCW pulse Nd:YAG master oscillator and a Nd:YAG slab amplifier.
    • Employed a multi-pass zigzag architecture for the amplifier.
    • Operated at a 500 Hz pulse repetition frequency and ~105 μs pulse width.

    Main Results:

    • Achieved a maximum output power of 51.5 W.
    • Reached an extraction efficiency of 14.2% under 217.8 W absorbed pump power.
    • Measured beam quality factors of Mx²=1.61 and My²=1.81.

    Conclusions:

    • This work presents the first compact, high-power, high-beam-quality QCW Nd:YAG amplifier at 1319 nm using a multi-pass zigzag slab structure.
    • The demonstrated laser system offers a promising solution for applications requiring efficient and high-quality laser output.