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Related Concept Videos

Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

293
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:
293
Parallel Resonance01:23

Parallel Resonance

246
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:
246
Series Resonance01:17

Series Resonance

226
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...
226
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

2.1K
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...
2.1K
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

353
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...
353
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

257
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...
257

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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Triply-resonant sum frequency conversion with gallium phosphide ring resonators.

Alan D Logan, Shivangi Shree, Srivatsa Chakravarthi

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    Integrated gallium phosphide ring resonators achieve efficient sum frequency conversion, enabling visible-to-telecom photon conversion for quantum networks. This breakthrough advances quantum communication technologies.

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    Area of Science:

    • Integrated photonics
    • Nonlinear optics
    • Quantum communication

    Background:

    • Efficient frequency conversion is crucial for interfacing quantum emitters with telecom networks.
    • Gallium phosphide (GaP) offers desirable nonlinear optical properties for integrated devices.

    Purpose of the Study:

    • To demonstrate quasi-phase matched, triply-resonant sum frequency conversion in integrated GaP ring resonators.
    • To project the efficiency of difference frequency generation for visible-to-telecom conversion.

    Main Methods:

    • Fabrication of 10.6-µm-diameter integrated GaP ring resonators.
    • Measurement of waveguide-to-waveguide power conversion efficiency for sum frequency generation.
    • Modeling and projection of single photon conversion efficiency for difference frequency generation.

    Main Results:

    • Achieved a small-signal conversion efficiency of 8 ± 1.1%/mW for telecom/near-infrared to visible light.
    • Measured an absolute power conversion efficiency of 6.3 ± 0.6% at saturation.
    • Projected a single photon conversion efficiency of 7.2%/mW for visible to telecom conversion with optimized coupling.

    Conclusions:

    • Integrated GaP ring resonators enable efficient frequency conversion for quantum applications.
    • Efficient visible-to-telecom conversion is vital for long-distance quantum communication using solid-state emitters.
    • This work paves the way for long-distance entanglement distribution in quantum networks.