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Related Concept Videos

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:
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
Series Resonance01:17

Series Resonance

The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...

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Updated: Jun 12, 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

Resonator with variable-reflectivity output coupler.

M Couture, M Piché

    Applied Optics
    |May 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new resonator design uses polarization to control output coupling. This method offers a wide range of adjustments and has been verified with a carbon dioxide (CO2) laser experiment.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics

    Background:

    • Controlling output coupling is crucial for laser resonator design.
    • Traditional methods for output coupling adjustment can be limited.

    Purpose of the Study:

    • To propose and analyze a novel resonator design.
    • To utilize polarizing components for continuous output coupling variation.

    Main Methods:

    • Theoretical analysis of resonator mode polarization properties.
    • Experimental verification using a transversely excited atmospheric (TEA) carbon dioxide (CO2) laser.

    Main Results:

    • Demonstrated continuous variation of output coupling over a wide range.
    • Provided practical guidelines for selecting polarizing components.
    • Experimental results validated the theoretical analysis.

    Conclusions:

    • The proposed resonator design effectively controls output coupling using polarization.
    • Polarizing elements offer a versatile method for resonator tuning.
    • The findings are applicable to the design of tunable lasers.