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Related Concept Videos

MOSFET Amplifiers01:17

MOSFET Amplifiers

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...
Parallel Resonance01:23

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
Switching of BJT01:22

Switching of BJT

Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are reverse-biased. The...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...

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Related Experiment Video

Updated: Jun 13, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Cone-mirror resonator Q-switched operation.

J Chen

    Applied Optics
    |April 20, 2010
    PubMed
    Summary

    Giant pulse Q-switched laser operation was achieved using a cone-mirror resonator. This design offers advantages for high-energy laser applications with careful engineering.

    Area of Science:

    • Optics and Photonics
    • Laser Physics

    Background:

    • Q-switched lasers are crucial for generating high-intensity pulses.
    • Resonator design significantly impacts laser performance and energy output.

    Purpose of the Study:

    • To investigate the giant pulse Q-switched operation of a novel cone-mirror resonator.
    • To analyze the relationship between resonator length and output energy.
    • To assess the damage threshold at the dye cell location within the resonator.

    Main Methods:

    • Experimental setup utilizing a cone-mirror resonator for giant pulse Q-switching.
    • Systematic measurement of output energy as a function of resonator length.
    • Evaluation of material damage at critical points within the resonator.

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    Last Updated: Jun 13, 2026

    Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
    07:42

    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

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    09:46

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    Published on: August 8, 2025

    Main Results:

    • Successful demonstration of giant pulse Q-switched operation.
    • Characterization of output energy dependence on resonator length.
    • Identification of damage levels at the dye cell, providing insights for optimization.

    Conclusions:

    • Cone-mirror resonators are a viable configuration for giant pulse Q-switched lasers.
    • Optimization and careful engineering can leverage the inherent advantages of this resonator design.
    • Further development could lead to enhanced laser performance and reliability.