Revisiting the optical properties of Nd doped yttrium orthovanadate

Zelmon, David E.; Lee, Julie J.; Currin, Kelly M.; Northridge, Jessica M; Perlov, D.

doi:10.1364/ao.49.000644

Cited by 27 publications

(17 citation statements)

References 12 publications

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“…For long nonlinear crystals, and correspondingly scaled compensation crystals, the thermal dependence of the optical path-lengths of extra-ordinary and ordinary polarized photons, makes thermal isolation necessary in order to achieve good long-term stability. In the case of 18.5-mm of YVO 4 , we calculate [23] that a temperature change of ∼ 2.4 • C results in a π phase-shift, which is in good agreement with the experimental data (see section 3). This means, that in order to maintain a fidelity above 99.5 % requires stabilization to ± 0.1 • C. Similarly, temperaturedependent path-lengths in KTP [24,25] result in a required stability of the down-conversion crystal of ± 0.05 • C.…”

Section: Compensation Crystalssupporting

confidence: 87%

Phase-stable source of polarization-entangled photons in a linear double-pass configuration

Steinlechner¹,

Ramelow²,

Jofre³

et al. 2013

Opt. Express

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Abstract:We demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional downconversion in a novel 'folded sandwich' configuration. Bi-directionally pumping a single periodically poled KTiOPO 4 (ppKTP) crystal with a 405-nm laser diode, we generate entangled photon pairs at the nondegenerate wavelengths 784 nm (signal) and 839 nm (idler), and achieve an unprecedented detection rate of 11.8 kcps for 10.4 µW of pump power (1.1 million pairs / mW), in a 2.9-nm bandwidth, while maintaining a very high two-photon entanglement quality, with a Bell-state fidelity of 99.3 ± 0.3%.

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Section: Compensation Crystalssupporting

confidence: 87%

Phase-stable source of polarization-entangled photons in a linear double-pass configuration

Steinlechner¹,

Ramelow²,

Jofre³

et al. 2013

Opt. Express

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“…On the other hand, the GdVO 4 crystal has a somewhat smaller value than the LuVO 4 and YVO 4 crystals for the thermo-optic coefficient in the direction perpendicular to the c-axis. On the whole, our experimental results are found to agree very well with the data reported by Zelmon et al [13,14].…”

Section: Introductionsupporting

confidence: 93%

“…The thermal-optic coefficient dn/dT of a laser crystal is explicitly associated with the thermally induced lensing effect that significantly influences the cavity stability, the oscillation mode size, the maximum achievable average power and the quality of the output beam [6,7]. There are some reported values of dn/dT obtained by different methods for Nd:GdVO 4 , Nd:YVO 4 and Nd:LuVO 4 crystals near 1064 nm [8][9][10][11][12][13][14]. However, the reported data are found to differ considerably from each other.…”

Section: Introductionmentioning

confidence: 99%

Precise measurement of the thermo-optical coefficients of various Nd-doped vanadates with an intracavity self-mode-locked scheme

Tung¹,

Wu²,

Liang³

et al. 2014

Laser Phys.

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We employ an intracavity self-mode-locked laser to precisely measure the group refractive indices and thermo-optic coefficients for Nd-doped vanadates at 1064 nm. The samples include Nd:GdVO 4 , Nd:YVO 4 and Nd:LuVO 4 crystals. We make a detailed comparison between the present results and those currently reported in the literature. We confirm that the present results are in good agreement with the currently available data with the best precision.

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“…The total length was composed of 7 slabs YVO 4 of 2 cm length and one slab of 1 cm, 2 mm and 1 mm length. The total length is close to some of the reported data on the refractive index of YVO 4 in the literature [20], even though they investigated 0.5 % Nd-doped YVO 4 . However, it deviates from the value reported by other studies [21], as well as from the manufacturer specification (Foctek Inc.) [19].…”

Section: Determining the Optimal Crystal Lengthsupporting

confidence: 87%

A folded-sandwich polarization-entangled two-color photon pair source with large tuning capability for applications in hybrid quantum systems

et al. 2016

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and a stationary state in atoms [2], ions [3], semiconductor quantum dots [4], color defect centers [5] and even superconducting qubits [6]. A Bell measurement on two photons of each of two such states would then immediately establish entanglement between two stationary, possibly dissimilar states [7,8]. However, two dissimilar systems may emit light at vastly different wavelengths. It is not possible to entangle such systems with different transition energies via a Bell state measurement. One possible solution of this problem is to use a two-color pair of entangled photons, which are color-matched to these two different transitions as shown in Fig. 1a. The two-color photon pair source mediates entanglement between two dissimilar wavelengths. In the same manner, it can convert the wavelength of flying qubits as shown in Fig. 1b. This is especially helpful if entanglement should be established over long distances, e.g., via optical fibers in the telecom band. The key building block in these two applications is a source of non-degenerate entangled photons. Especially when working with systems whose wavelengths are hundreds of nanometers apart, such a source has to generate highly non-degenerate photons. In contrast to previous highly non-degenerate sources [9], our source introduces wavelength-insensitive components and is thus in principle widely tunable. This is another important requirement when working with a variety of different systems in hybrid systems, in particular with systems that may vary in time or from experiment to experiment.Up to now, the brightest and most practical sources of entangled photon pairs rely on spontaneous parametric down-conversion in nonlinear crystals [10]. With appropriate phase matching, two-color sources with photons at different wavelengths can be realized [9,11,12]. For subsequent fiber coupling, collinear down-conversion schemes are most convenient. Furthermore, the collinear alignment enables further integration and can be used in a monolithic design [12]. AbstractWe demonstrate a two-color entangled photon pair source which can be adapted easily to a wide range of wavelength combinations. A Fresnel rhomb as a geometrical quarter-wave plate and a versatile combination of compensation crystals are key components of the source. Entanglement of two photons at the Cs D1 line (894.3 nm) and at the telecom O-band (1313.1 nm) with a fidelity of F = 0.753 ± 0.021 is demonstrated, and improvements of the setup are discussed.

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Revisiting the optical properties of Nd doped yttrium orthovanadate

Cited by 27 publications

References 12 publications

Phase-stable source of polarization-entangled photons in a linear double-pass configuration

Phase-stable source of polarization-entangled photons in a linear double-pass configuration

Precise measurement of the thermo-optical coefficients of various Nd-doped vanadates with an intracavity self-mode-locked scheme

A folded-sandwich polarization-entangled two-color photon pair source with large tuning capability for applications in hybrid quantum systems

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