Preparation of high-purity TeO2-ZnO glass batches

Моисеев, А. Н.; Дорофеев, В. В.; Chilyasov, A. V.; Кутьин, А. М.; Пименов, В. Г.; Плотниченко, В. Г.; Колташев, В. В.

doi:10.1134/s0020168507060210

Cited by 11 publications

(11 citation statements)

References 6 publications

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“…But few of TeO 3 units contain a NBO with a double bond to tellurium, two bridging oxygen ions. The bands observed around 700-800 cm -1 region are due to the formation of Zn 2 Te 3 O 8 units in the glass matrix [27,28]. It can be observed from Fig.…”

Section: Raman Spectral Studiesmentioning

confidence: 87%

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Sreenivasulu

Upender

Mouli

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Raman Spectral Studiesmentioning

confidence: 87%

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Sreenivasulu

Upender

Mouli

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…It enables controlled manipulation of resonance frequencies of absorbers for storage and recall, e.g. for controlled reversible inhomogeneous broadening of narrow absorption lines in CRIB, and quantum state engineering such as pulse compression/decompression [84]. This control is governed by the interaction of applied external fields with permanent electric dipole moments.…”

Section: Stark Effectmentioning

confidence: 99%

Spectroscopic investigations of a waveguide for photon-echo quantum memory

Sinclair

Sağlamyürek

George

et al. 2010

Journal of Luminescence

108

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a b s t r a c tWe report the fabrication and characterization of a Ti 4 þ : Tm 3 þ : LiNbO 3 optical waveguide in view of photon-echo quantum memory applications. Specifically, we investigated room-and cryogenictemperature properties of the waveguide, and the Tm 3 þ ions, via absorption, spectral hole burning, photon echo, and Stark spectroscopy. For the Tm 3 þ ions, we found radiative lifetimes of 82 ms and 2.4 ms for the 3 H 4 and 3 F 4 levels, respectively, and a 44% branching ratio from the 3 H 4 to the 3 F 4 level.We also measured an optical coherence time of 1:6 ms for the 3 H 6 2 3 H 4 , 795 nm wavelength transition, and investigated the limitation of spectral diffusion to spectral hole burning. Upon application of magnetic fields of a few hundred Gauss, we observed persistent spectral holes with lifetimes up to seconds. Furthermore, we measured a linear Stark shift of 25 kHz cm=V. Our results are promising for integrated, electro-optical, waveguide quantum memory for photons.

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“…α ef f L is the effective optical depth, which depends on the on-resonant absorption coefficient α o = β π/2/∆ (31) n,nat , L is the length of the atomic medium, and Γ is related to IB that leads to irreversible dephasing of atomic coherence. In the case of RECRIB, assuming that the width of the initial, naturally broadened absorption line ∆ (possibly reduced through spectral tailoring [19]), is small compared to the line width ∆ (31) n,cont after controlled broadening, we find α…”

mentioning

confidence: 99%

“…n,nat /∆ (31) n,cont and Γ (RECRIB) = f ∆ (31) n,nat . For REAFC, assuming that the width γ of each individual line of the comb is small compared to the width of the whole comb structure, and that the comb has a large number of lines, we find α…”

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confidence: 99%

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Optical quantum memory with generalized time-reversible atom–light interaction

Моисеев

Tittel

2011

New J. Phys.

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We examine a quantum memory scheme based on controllable dephasing of atomic coherence of a non-resonant, inhomogeneously broadened Raman transition. We show that it generalizes the physical conditions for time-reversible interaction between light and atomic ensembles from weak to strong fields and from linear to non-linear interactions. We also develop a unified framework for different realizations exploiting either controlled reversible inhomogeneous broadening or atomic frequency combs, and discuss new aspects related to storage and manipulation of quantum states.PACS numbers: 03.67. 42.50.Ct, 42.50.Md The study of time-reversible evolution of physical systems was central in the development of thermodynamics and statistical mechanics [1], and CPT symmetry [2]. Furthermore, reversible interaction underpins reversible transfer of quantum states between light and atoms, i.e. quantum memory (QM), which is key for quantum repeaters [3] and all-optical quantum computing [4].Approaches to QM exploit atoms in cavities [6], nonresonant Raman transitions [7,8], electromagnetically induced transparency [9,10,11,12,13,14,15], or photonecho techniques [16,17,18,19,20,21,22,23]. The latter is of particular interest in the present context, as the equations of motion include a hidden time-reversal symmetry [18]. It has, however, so far only been discussed for weak light fields. Here we generalize the physical conditions allowing for time-reversal symmetry in the mapping of quantum states between light and atomic ensembles to fields of arbitrary strength and non-linear interactions. The scheme exploits reversible dephasing of atomic coherence of a non-resonant, inhomogeneously broadened Raman transition (Raman Echo Quantum Memory or REQM). It has been proposed in [24], further developed in [25,27], and first demonstrated in [28]. We also compare the conditions for time-reversibility for storage of strong fields with those for weak fields, which naturally leads to a unified framework for realizations of REQM based on controlled reversible inhomogeneous broadening (CRIB) [18] or atomic frequency combs (AFC) [22]. Our findings shed new light on time-reversibility in the interaction between light and inhomogeneously broadened atomic ensembles, and also pave the road to storage of macroscopic light fields in nano-sized atomic media. Furthermore, we discuss with the example of frequency conversion how REQM enables controlled manipulation of quantum light fields.The scheme: Energy and temporal diagrams of the interaction scheme are depicted in Fig.1. At time t=0 the probe light fieldÊ 1 (t, z) with duration δt 1 , carrier frequency ω 1 and spectral width δω 1 = δt −1

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Preparation of high-purity TeO2-ZnO glass batches

Cited by 11 publications

References 6 publications

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Spectroscopic investigations of a waveguide for photon-echo quantum memory

Optical quantum memory with generalized time-reversible atom–light interaction

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