Optical memory bandwidth and multiplexing capacity in the erbium telecommunication window

Dajczgewand, Julian; Ahlefeldt, Rose L.; Böttger, Thomas; Louchet-Chauvet, Anne; Gouët, J.-L. Le; Chanelière, Thierry

doi:10.1088/1367-2630/17/2/023031

Cited by 29 publications

(36 citation statements)

References 45 publications

(100 reference statements)

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“…The fitted T 2e f f = 37.4 ± 0.9 µs, is obviously shorter than the optical coherence time. This is attributed to the severe instantaneous spectral diffusion (ISD) effect [22][40] [41] induced by the massive rephasing pulses. A possible way to minimize this effect is reducing the storage bandwidth [41].…”

Section: B Rose Storagementioning

confidence: 99%

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Reliable coherent optical memory based on a laser-written waveguide

Liu¹,

Zhou²,

Zhu³

et al. 2020

Optica

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151 Eu 3+ -doped yttrium silicate ( 151 Eu 3+ : Y 2 SiO 5 ) crystal is a unique material that possesses hyperfine states with coherence time up to 6 h. Many efforts have been devoted to the development of this material as optical quantum memories based on the bulk crystals, but integrable structures (such as optical waveguides) that can promote 151 Eu 3+ : Y 2 SiO 5 -based quantum memories to practical applications, have not been demonstrated so far. Here we report the fabrication of type II waveguides in a 151 Eu 3+ : Y 2 SiO 5 crystal using femtosecond-laser micromachining. The resulting waveguides are compatible with single-mode fibers and have the smallest insertion loss of 4.95 dB. On-demand light storage is demonstrated in a waveguide by employing the spinwave atomic frequency comb (AFC) scheme and the revival of silenced echo (ROSE) scheme. We implement a series of interference experiments based on these two schemes to characterize the storage fidelity. Interference visibility of the readout pulse is 0.99 ± 0.03 for the spin-wave AFC scheme and 0.97 ± 0.02 for the ROSE scheme, demonstrating the reliability of the integrated optical memory.

show abstract

Section: B Rose Storagementioning

confidence: 99%

“…This is attributed to the severe instantaneous spectral diffusion (ISD) effect [22][40] [41] induced by the massive rephasing pulses. A possible way to minimize this effect is reducing the storage bandwidth [41]. Moreover, longer storage time can be expected by transferring the coherence to spin states [42].…”

Section: B Rose Storagementioning

confidence: 99%

Reliable coherent optical memory based on a laser-written waveguide

Liu¹,

Zhou²,

Zhu³

et al. 2020

Optica

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“…To overcome the population inversion constraint in photon echoes, several modified photon echo schemes have been developed for quantum memory applications since 2001 1 . The modified photon echo schemes for quantum memory protocols include controlled reversible inhomogeneous broadening (CRIB) 1 – 5 and atomic frequency comb (AFC) echoes 6 – 9 for a single rephasing scheme, and silent echoes 10 , 11 , dc Stark echoes 12 , 13 , controlled double rephasing (CDR) echoes 14 , 15 and optically locked photon echoes 16 for a double rephaisng scheme. These modified photon echo protocols can also be categorized as two-level 3 , 4 , 6 , 9 – 13 or three-level 1 , 2 , 5 , 7 , 8 , 14 – 16 schemes.…”

Section: Introductionmentioning

confidence: 99%

A controlled ac Stark echo for quantum memories

Ham

2017

Sci Rep

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A quantum memory protocol of controlled ac Stark echoes (CASE) based on a double rephasing photon echo scheme via controlled Rabi flopping is proposed. The double rephasing scheme of photon echoes inherently satisfies the no-population inversion requirement for quantum memories, but the resultant absorptive echo remains a fundamental problem. Herein, it is reported that the first echo in the double rephasing scheme can be dynamically controlled so that it does not affect the second echo, which is accomplished by using unbalanced ac Stark shifts. Then, the second echo is coherently controlled to be emissive via controlled coherence conversion. Finally a near perfect ultralong CASE is presented using a backward echo scheme. Compared with other methods such as dc Stark echoes, the present protocol is all-optical with advantages of wavelength-selective dynamic control of quantum processing for erasing, buffering, and channel multiplexing.

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“…Our experimental setup has been extensively described previously in refs. [27,28] (see Fig.1). We implement a 2PE sequence in Fig.2 with a probe beam polarized along D 1 whose waist is 50 µm.…”

mentioning

confidence: 96%

“…Y2SiO5 sample doped with 50 ppm of Er 3+ . At 1.8 K and under a 2T magnetic field in the plane (D1-D2), the coherence time is ∼ 130µs ( 4 I 15/2 -4 I 13/2 transition for "site 1" )[28,30].…”

mentioning

confidence: 99%

Light-shift-modulated photon-echo

Chanelière¹,

Hétet²

2015

Opt. Lett.

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We show that the AC-Stark shift (light-shift) is a powerful and versatile tool to control the emission of a photon-echo in the context of optical storage. As a proof-of-principle, we demonstrate that the photon-echo efficiency can be fully modulated by applying light-shift control pulses in an erbium-doped solid. The control of the echo emission is attributed to the spatial gradient induced by the light-shift beam.

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Optical memory bandwidth and multiplexing capacity in the erbium telecommunication window

Cited by 29 publications

References 45 publications

Reliable coherent optical memory based on a laser-written waveguide

Reliable coherent optical memory based on a laser-written waveguide

A controlled ac Stark echo for quantum memories

Light-shift-modulated photon-echo

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