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Related Concept Videos

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:
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:
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.
Starting with a fixed...
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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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

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Published on: August 5, 2013

Highly efficient frequency doubling with a doubly resonant monolithic total-internal-reflection ring resonator.

K Fiedler, S Schiller, R Paschotta

    Optics Letters
    |October 16, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates efficient second-harmonic generation in a novel MgO:LiNbO(3) ring resonator. The device achieves over 50% conversion efficiency for green light generation from infrared lasers.

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    Area of Science:

    • Nonlinear optics
    • Materials science
    • Integrated photonics

    Background:

    • Second-harmonic generation (SHG) is crucial for frequency conversion in lasers.
    • MgO:LiNbO(3) (magnesium oxide-doped lithium niobate) offers excellent nonlinear optical properties.
    • Ring resonators enhance light-matter interaction for nonlinear processes.

    Purpose of the Study:

    • To demonstrate efficient doubly resonant second-harmonic generation (DR-SHG).
    • To utilize a monolithic total-internal-reflection (TIR) MgO:LiNbO(3) ring resonator.
    • To achieve high conversion efficiency with independent fundamental and harmonic wave coupling.

    Main Methods:

    • Fabrication of a coating-free monolithic TIR MgO:LiNbO(3) ring resonator.
    • Maintaining resonance for both fundamental (1.06-microm) and harmonic waves via temperature and laser frequency control.
    • Employing two calcite coupling prisms to frustrate TIR for independent input/output coupling.

    Main Results:

    • Successful demonstration of DR-SHG in the MgO:LiNbO(3) ring resonator.
    • Achieved external conversion efficiencies exceeding 50%.
    • Efficient operation at input fundamental powers above 5 mW.

    Conclusions:

    • Monolithic TIR MgO:LiNbO(3) ring resonators are effective for efficient DR-SHG.
    • The demonstrated coupling scheme allows independent control of fundamental and harmonic waves.
    • This approach offers a promising route for compact and efficient frequency conversion devices.