On-demand multimode optical storage in a laser-written on-chip waveguide

Su, Ming-Xu; Zhu, Tianli; Liu, Chao; Zhou, Zong‐Quan; Li, Chuan‐Feng; Guo, Guang‐Can

doi:10.1103/physreva.105.052432

Cited by 11 publications

(7 citation statements)

References 43 publications

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“…Towards a future quantum network [1][2][3][4] compatible with existing telecom infrastructure, this requirement must also be applied 5,6 . One challenge in pursuing such a quantum network is to develop a multimode quantum memory [7][8][9][10][11] , which is able to simultaneously store and process multiple modes of single photons in various degrees of freedom, such as in temporal degree [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] , spectral degree [27][28][29] , spatial degree [30][31][32][33][34][35][36][37][38] , or any combination of these 39,40 . In addition to the usual figures-of-merit for quantum memories, i.e., efficiency and fidelity, the multimode performance of a quantum memory is also important, which is mainly determined by the number of storage channels, storage time, and storage bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…Towards a future quantum network [1][2][3][4] compatible with existing telecom infrastructure, this requirement must also be applied [5,6]. One challenge in pursuing such a quantum network is to develop a multimode quantum memory [7][8][9][10][11], which is able to simultaneously store and process multiple modes of single photons in various degrees of freedom, such as in temporal degree [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], spectral degree [27][28][29], spatial degree [30][31][32][33][34][35][36][37][38],…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Storage of 1650 modes of single photons at telecom wavelength

Wei¹,

Jing

Zhang

et al. 2022

Preprint

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To advance the full potential of quantum networks one should be able to distribute quantum resources over long distances at appreciable rates. As a consequence, all components in the networks need to have large multimode capacity to manipulate photonic quantum states. Towards this end, a multimode photonic quantum memory, especially one operating at telecom wavelength, remains a key challenge. Here we demonstrate a spectro-temporally multiplexed quantum memory at 1532 nm. Multimode quantum storage of telecom-band heralded single photons is realized by employing the atomic frequency comb protocol in a 10-m-long cryogenically cooled erbium doped silica fibre. The multiplexing encompasses five spectral channels - each 10 GHz wide - and in each of these up to 330 temporal modes, resulting in the simultaneous storage of 1650 modes of single photons. Our demonstrations open doors for high-rate quantum networks, which are essential for future quantum internet.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Storage of 1650 modes of single photons at telecom wavelength

Wei¹,

Jing

Zhang

et al. 2022

Preprint

View full text Add to dashboard Cite

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“…It was shown that the number of temporal modes that can be stored with this protocol is ∼ N AF C /6, where N AF C is the number absorption peaks within the comb [35]. With a bandwidth of a few MHz, we can expect to create an AFC that could store N t ∼ 10 2 temporal modes with N AF C ∼ 600 [45]. REIDs are also suitable for large spectral multiplexing [39,46] capability due to the inhomogenous broadening they posses: up to N f ∼ 10 3 spectral modes can be stored within an optical transition with γ inh ∼ 10 GHz.…”

Section: Memory Architecturementioning

confidence: 99%

“…REIDs are also suitable for large spectral multiplexing [39,46] capability due to the inhomogenous broadening they posses: up to N f ∼ 10 3 spectral modes can be stored within an optical transition with γ inh ∼ 10 GHz. Finally, laser waveguide writing techniques [45,47] may allow creating N s ∼ 100 × 100 arrays of spatial modes within a single crystal, thus putting the total number of available modes to N Mem = N t × N f × N s ∼ 10 9 . This hypothetical value is well beyond the required capacity of N ∼ 5×10 5 for 30 dB average channel loss in combination with η mem = 0.6 and η det = 0.8.…”

Section: Memory Architecturementioning

confidence: 99%

Time-delayed single quantum repeater node for global quantum communications with a single satellite

Gündoğan¹,

Sidhu²,

Oi³

et al. 2023

Preprint

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Quantum networking on a global scale is an immensely challenging endeavor that is fraught with significant technical and scientific obstacles. While various types of quantum repeaters have been proposed they are typically limited to distances of a few thousand kilometers or require extensive hardware overhead. Recent proposals suggest that space-borne quantum repeaters composed of a small number of satellites carrying on-board quantum memories would be able to cover truly global distances. In this paper, we propose an alternative to such repeater constellations using an ultra-long lived quantum memory in combination with a second memory with a shorter storage time. This combination effectively acts as a time-delayed version of a single quantum repeater node. We investigate the attainable finite key rates and demonstrate an improvement of at least three orders of magnitude over prior single-satellite methods that rely on a single memory, while simultaneously reducing the necessary memory capacity by the same amount. We conclude by suggesting an experimental platform to realize this scheme.

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“…Substantial efforts have been devoted to manufacturing on-chip storage devices through various methods, such as Ti 4+ in-diffusion (18,19), focused ion beam milling (20), and femtosecond laser micromachining (FLM) (21). On the basis of devices from these methods, photonics quantum memories have already demonstrated in different systems (22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39). Recently, erbium ion-doped waveguides, thanks to the optical translation of 4 I 15/2 ↔ 4 I 13/2 at telecom band, have been used to realize integrated quantum memory at 1.5-μm wavelength (24)(25)(26)(27)(40)(41)(42).…”

Section: Introductionmentioning

confidence: 99%

Telecom-band–integrated multimode photonic quantum memory

Zhang

Wei

et al. 2023

Sci. Adv.

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Telecom-band–integrated quantum memory is an elementary building block for developing quantum networks compatible with fiber communication infrastructures. Toward such a network with large capacity, an integrated multimode photonic quantum memory at telecom band has yet been demonstrated. Here, we report a fiber-integrated multimode quantum storage of single photon at telecom band on a laser-written chip. The storage device is a fiber-pigtailed Er 3+ :LiNbO 3 waveguide and allows a storage of up to 330 temporal modes of heralded single photon with 4-GHz-wide bandwidth at 1532 nm and a 167-fold increasing of coincidence detection rate with respect to single mode. Our memory system with all-fiber addressing is performed using telecom-band fiber-integrated and on-chip components. The results represent an important step for the future quantum networks using integrated photonics devices.

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On-demand multimode optical storage in a laser-written on-chip waveguide

Cited by 11 publications

References 43 publications

Storage of 1650 modes of single photons at telecom wavelength

Storage of 1650 modes of single photons at telecom wavelength

Time-delayed single quantum repeater node for global quantum communications with a single satellite

Telecom-band–integrated multimode photonic quantum memory

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