Triply resonant coupled-cavity electro-optic modulators for RF to optical signal conversion

Gevorgyan, Hayk; Khilo, Anatol; Ehrlichman, Yossef; Popović, Miloš A.

doi:10.1364/oe.385856

Cited by 14 publications

(16 citation statements)

References 41 publications

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“…Our electro-optic converter consists of a triply-resonant system utilizing two optical modes and one microwave mode, similar to the proposals in [48] and [49]. Figs.…”

Section: B Basic Theory Of Operationmentioning

confidence: 99%

Cryogenic microwave-to-optical conversion using a triply resonant lithium-niobate-on-sapphire transducer

McKenna

Witmer

Patel

et al. 2020

Optica

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Quantum networks are likely to have a profound impact on the way we compute and communicate in the future. In order to wire together superconducting quantum processors over kilometerscale distances, we need transducers that can generate entanglement between the microwave and optical domains with high fidelity. We present an integrated electro-optic transducer that combines low-loss lithium niobate photonics with superconducting microwave resonators on a sapphire substrate. Our triply-resonant device operates in a dilution refrigerator and converts microwave photons to optical photons with an on-chip efficiency of 6.6 × 10 −6 and a conversion bandwidth of 20 MHz. We discuss design trade-offs in this device, including strategies to manage acoustic loss, and outline ways to increase the conversion efficiency in the future.

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“…Our electro-optic converter consists of a triply-resonant system utilizing two optical modes and one microwave mode, similar to the proposals in [48] and [49]. Figs.…”

Section: B Basic Theory Of Operationmentioning

confidence: 99%

Cryogenic microwave-to-optical conversion using a triply resonant lithium-niobate-on-sapphire transducer

McKenna

Witmer

Patel

et al. 2020

Optica

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show abstract

“…Such a transducer offers a promising route toward both large-scale distributed superconducting quantum networks and the scaling of superconductor quantum processors beyond single cryogenic environments [7]. Furthermore, single-photon microwave-to-optical transduction can be used to create high efficiency modulators [8], detectors for individual microwave photons [9], and multiplexed readout of cryogenic electronics [10].…”

Section: Introductionmentioning

confidence: 99%

Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction

Holzgrafe¹,

Sinclair²,

Zhu³

et al. 2020

Optica

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Linking superconducting quantum devices to optical fibers via microwave-optical quantum transducers may enable large-scale quantum networks. For this application, transducers based on the Pockels electro-optic (EO) effect are promising for their direct conversion mechanism, high bandwidth, and potential for low-noise operation. However, previously demonstrated EO transducers require large optical pump power to overcome weak EO coupling and reach high efficiency. Here, we create an EO transducer in thin-film lithium niobate, a platform that provides low optical loss and strong EO coupling. We demonstrate on-chip transduction efficiencies of up to and of optical pump power. The transduction efficiency can be improved by further reducing the microwave resonator’s piezoelectric coupling to acoustic modes, increasing the optical resonator quality factor to previously demonstrated levels, and changing the electrode geometry for enhanced EO coupling. We expect that with further development, EO transducers in thin-film lithium niobate can achieve near-unity efficiency with low optical pump power.

show abstract

Section: Introductionmentioning

confidence: 99%

Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction

Holzgrafe¹,

Sinclair²,

Zhu³

et al. 2020

Preprint

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Linking superconducting quantum devices to optical fibers via microwave-optical quantum transducers may enable large scale quantum networks. For this application, transducers based on the Pockels electro-optic (EO) effect are promising for their direct conversion mechanism, high bandwidth, and potential for low-noise operation. However, previously demonstrated EO transducers require large optical pump power to overcome weak EO coupling and reach high efficiency. Here, we create an EO transducer in thin-film lithium niobate, leveraging the low optical loss and strong EO coupling in this platform. We demonstrate a transduction efficiency of up to 2.7 × 10 −5 , and a pump-power normalized efficiency of 1.9 × 10 −6 /µW. The transduction efficiency can be improved by further reducing the microwave resonator's piezoelectric coupling to acoustic modes, increasing the optical resonator quality factor to previously demonstrated levels, and changing the electrode geometry for enhanced EO coupling. We expect that with further development, EO transducers in thin-film lithium niobate can achieve near-unity efficiency with low optical pump power.

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Triply resonant coupled-cavity electro-optic modulators for RF to optical signal conversion

Cited by 14 publications

References 41 publications

Cryogenic microwave-to-optical conversion using a triply resonant lithium-niobate-on-sapphire transducer

Cryogenic microwave-to-optical conversion using a triply resonant lithium-niobate-on-sapphire transducer

Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction

Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction

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