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Related Concept Videos

Parallel Resonance01:23

Parallel Resonance

451
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:
451

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Related Experiment Video

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Fabrication of Silica Ultra High Quality Factor Microresonators
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Pockels-effect-based adiabatic frequency conversion in ultrahigh-Q microresonators.

Yannick Minet, Luis Reis, Jan Szabados

    Optics Express
    |March 4, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Adiabatic frequency conversion (AFC) using the Pockels effect in lithium niobate microresonators achieves 100% efficiency. This method enables large frequency shifts and chirps, paving the way for on-chip mass production.

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    Area of Science:

    • Photonics
    • Quantum Optics
    • Materials Science

    Background:

    • Adiabatic frequency conversion (AFC) offers advantages over nonlinear methods, including no threshold or phase-matching requirements and 100% efficiency.
    • Existing AFC schemes in microresonators are limited by low resonator quality factors or small frequency shifts.

    Purpose of the Study:

    • To present a novel AFC scheme utilizing the Pockels effect in an ultrahigh-Q lithium niobate microresonator.
    • To demonstrate significant frequency shifts and controllable chirps using this approach.

    Main Methods:

    • Employed a non-centrosymmetric, ultrahigh-Q microresonator made from lithium niobate.
    • Utilized the Pockels effect for frequency conversion by applying voltage to the resonator.
    • Investigated the generation of both positive and negative frequency chirps.

    Main Results:

    • Achieved frequency shifts exceeding 5 GHz with only 20 V applied to a 70-µm-thick resonator.
    • Demonstrated the capability to generate both positive and negative frequency chirps.
    • Showcased the potential for realizing nearly arbitrary frequency shifts by controlling applied voltage.

    Conclusions:

    • The Pockels effect in ultrahigh-Q lithium niobate microresonators provides an efficient and versatile method for adiabatic frequency conversion.
    • The demonstrated technique overcomes limitations of previous AFC schemes, offering large frequency shifts and tunable chirps.
    • Advances in on-chip fabrication of lithium niobate devices suggest feasibility for mass production of this AFC apparatus.