The temperature and light intensity dependence of photorefraction in LiNbO3

Augstov, P. A.; Shvarts, K.K.

doi:10.1007/bf00900683

Cited by 21 publications

(4 citation statements)

References 10 publications

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“…For the proof-of-principle experiment in this work, we have chosen a slightly different operating point of 190 °C as it simplifies the choice of suitable ovens and insulation materials, thus shifting the target wavelength to 550 nm. As unwanted effects such as photorefraction are only present at lower temperatures 35 , there is no fundamental limitation for increasing the temperature as high as the Curie temperature. The alternative silicon-vacancy transition 25 at 738 nm cannot be reached with the birefringent properties of lithium niobate.…”

Section: Discussionmentioning

confidence: 99%

Highly efficient frequency conversion with bandwidth compression of quantum light

Allgaier¹,

Ansari²,

Sansoni³

et al. 2017

Nat Commun

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Hybrid quantum networks rely on efficient interfacing of dissimilar quantum nodes, as elements based on parametric downconversion sources, quantum dots, colour centres or atoms are fundamentally different in their frequencies and bandwidths. Although pulse manipulation has been demonstrated in very different systems, to date no interface exists that provides both an efficient bandwidth compression and a substantial frequency translation at the same time. Here we demonstrate an engineered sum-frequency-conversion process in lithium niobate that achieves both goals. We convert pure photons at telecom wavelengths to the visible range while compressing the bandwidth by a factor of 7.47 under preservation of non-classical photon-number statistics. We achieve internal conversion efficiencies of 61.5%, significantly outperforming spectral filtering for bandwidth compression. Our system thus makes the connection between previously incompatible quantum systems as a step towards usable quantum networks.

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Section: Discussionmentioning

confidence: 99%

Highly efficient frequency conversion with bandwidth compression of quantum light

Allgaier¹,

Ansari²,

Sansoni³

et al. 2017

Nat Commun

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“…In order to achieve temporal single-mode operation, the SFG process is tailored such that the input (1550 nm) and pump (850 nm) fields are group velocity matched and result in an output (idler) field in the visible (550 nm), at an operating temperaure of 200 ˝C and with a poling period of 4.4 µm. The high temperature operation avoids effects arising due to photo-refraction, allowing high pump field powers for increased efficiency [18].…”

Section: Quantum Pulse Gate Benchmarksmentioning

confidence: 99%

Improved non-linear devices for quantum applications

Gil-Lopez,

Santandrea,

Brecht

et al. 2021

Preprint

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In this paper, we review the state of the art of mode selective, integrated sum-frequency generation devices tailored for quantum optical technologies. We explore benchmarks to asses their performance and discuss the current limitations of these devices, outlining possible strategies to overcome them. Finally, we present the fabrication of a new, improved device and its characterization. We analyse the fabrication quality of this device and discuss the next steps towards improved non-linear devices for quantum applications.

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“…and the applicable pump intensity in the crystal is limited to a value below 70 GW/cm 2 due to photorefraction (Furukawa et al, 2000;Augstov and Shvarts, 1980).…”

Section: Yb:yag Based Opcpa Systemsmentioning

confidence: 99%

Third-Generation Femtosecond Technology

et al. 2016

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Chirped pulse amplification in solid-state lasers is currently the method of choice for producing high-energy ultrashort pulses, having surpassed the performance of dye lasers over 20 years ago. The third generation of femtosecond technology based on short-pulse-pumped optical parametric chirped pulse amplification (OPCPA) holds promise for providing few-cycle pulses with terawatt-scale peak powers and kilowatt-scale-average powers simultaneously, heralding the next wave of attosecond and femtosecond science.OPCPA laser systems pumped by near-1-ps pulses support broadband and efficient amplification of few-cycle pulses due to their unrivaled gain per unit length. This is rooted in the high threshold for dielectric breakdown of the nonlinear crystals for even shorter pump pulse durations. Concomitantly, short pump pulses simplify dispersion management and improve the temporal contrast of the amplified signal.This thesis covers the main experimental and theoretical steps required to design and operate a high-power, high-energy, few-cycle OPCPA. This includes the generation of a broadband, high-contrast, carrier envelope phase (CEP)-stable seed, the practical use of a high-power thin-disk regenerative amplifier, its efficient use for pumping a multi-stage OPCPA chain and compression of the resulting pulses. A theoretical exploration of the concept and its extension to different modes of operation, including widely-tunable, high-power multi-cycle pulse trains, and ultrabroadband waveform synthesis is presented.Finally, a conceptual design of a field synthesizer with multi-terawatt, multi-octave light transients is discussed, which holds promise for extending the photon energy attainable via high harmonic generation to several kiloelectronvolts, nourishing the hope for attosecond spectroscopy at hard-x-ray wavelengths.

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The temperature and light intensity dependence of photorefraction in LiNbO3

Cited by 21 publications

References 10 publications

Highly efficient frequency conversion with bandwidth compression of quantum light

Highly efficient frequency conversion with bandwidth compression of quantum light

Improved non-linear devices for quantum applications

Third-Generation Femtosecond Technology

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