Longitudinally diode-pumped 1.06-μm Nd3+:NaLa(MoO4)2laser without pump-wavelength stabilisation

Zharikov, E. V.; Lis, D. A.; Onishchenko, A. M.; Romanyuk, V.A.; Субботин, К. А.; Ushakov, S. N.; Шестаков, А. В.

doi:10.1070/qe2006v036n01abeh013100

Cited by 15 publications

(7 citation statements)

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“…of CW Ti:sapphire absorbed power, i.e., % [14], [15]; 2) up to 130 mW of laser output was obtained in NaGdW:2%Nd with diode pumping and up to 57% [20]; and 3) first laser experiments at NaLaMo:3.8%Nd crystal with diode pumping gave maximum output power about 100 mW with %, [8] however, already slight optimization of laser cavity raise up to 37% [46]. Direct comparison between these results is difficult due to the differences in experimental setups and antireflective coatings on the samples.…”

Section: Laser Experimentsmentioning

confidence: 99%

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Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$

García-Cortés

Cascales

Andrés

et al. 2007

IEEE J. Quantum Electron.

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Abstract-The continuous-wave laser operation of Nd-doped tetragonal NaLa(WO 4 ) 2 crystal is studied at room temperature by optical pumping in the spectral region overlapping AlGaAs diode laser emission. This crystal has inhomogenously broadened optical bands. From the room-temperature spectroscopic parameters determined it is found that the optimum Nd concentration for the 4 3 2 4 laser channels must be in the 3-5 at.% range. For = 11 2 and 13 2 channels ( 1 06 and 1.3 m) the most favourable polarization configuration is parallel to the crystallographic axis, while for = 9 2 little polarization dependence of the laser efficiency is predicted. Laser operation was achieved with a 3.35 at.% Nd-doped sample grown by the Czochralski method. The laser operation was tested in an hemispherical optical cavity pumped by a Ti:sapphire laser. Stimulated emission at = 1056 nm was achieved for a wide spectral pumping range, = 790-820 nm. Stimulated Raman scattering was achieved in the picosecond regime with an efficiency similar to that of monoclinic KY(WO 4 ) 2 reference compound.

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Section: Laser Experimentsmentioning

confidence: 99%

“…3) New laser technology requires pumping with semiconductor diode lasers. The inhomogeneous broadening of the absorption bands in tetragonal DT and DM is very favourable for laser diode pumping of the active medium, because thermal stabilization of pumping source is not critical in this case [8].…”

mentioning

confidence: 99%

Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$

García-Cortés

Cascales

Andrés

et al. 2007

IEEE J. Quantum Electron.

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“…Scheelite‐like sodium‐rare‐earth double molybdate and tungstate single crystals with the general formula Na m R n TO 4 (R = La 3+ , Gd 3+ , Y 3+ , Bi 3+ ;T = Mo 6+ , W 6+ , m ≈ n ≈ 0,5), doped by rare‐earth ions, are promising laser, Raman, and quantum cutting media, as well as the efficient phosphors for white light‐emitting diodes. [ 1‐11 ]…”

Section: Introductionmentioning

confidence: 99%

“…These features of the spectroscopic characteristic of scheelite‐like crystals allow their usage as the active media of femtosecond lasers operating in mode‐locked regime, [ 3,4,8 ] as well as broadly tunable lasers, [ 3,4,6 ] and diode pumped solid‐state lasers, convenient for operation in field conditions with self‐contained power supply, because no additional energy for thermostabilization of the pumping diodes is necessary for such lasers. [ 2,9 ]…”

Section: Introductionmentioning

confidence: 99%

Growth and the Actual Compositions of Cation‐Deficient Sodium‐Gadolinium Molybdate Single Crystals

Zharikov

Субботин

Titov

et al. 2020

Crystal Research and Technology

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The concentration series of sodium‐gadolinium molybdate (NGM) crystals have been grown by Czochralski technique from stoichiometric Na0,5Gd0,5MoO4 melt, and from seven different nonstoichiometric melts in various atmospheres. The actual cation compositions of the crystals are measured by microprobe analysis. The location of the congruently melting composition is found for this compound, and the homogeneity field is evaluated. The unit cell parameters of the crystals have been calculated from X‐ray diffraction (XRD) analysis results. Hydrostatic densities of the crystals are measured. Based on these results, the actual molar weights of the samples are calculated that allows more precise determination of the crystals compositions. The studied crystals are shown to contain substantial sodium deficiency and excess of gadolinium compared to stoichiometry. The amount of cation vacancies occurs in both sublattices along with increase of Gd2O3/Na2O molar ratio in the crystals.

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“…This allows these molybdates to be used as active laser media emitting ultrashort pulses, 5 as well their application in solid-state lasers tunable over a wide frequency range 9,10 and in diode-pumped lasers without temperature stabilization of a pump diode. 11 Among the sodium rare-earth molybdates, sodiumgadolinium molybdate (Na x Gd 1−x )MoO 4 (NGM) doped with rare-earth activators has important advantages, including improved spectroscopic characteristics. The growth technology for this crystal is not complicated by specific difficulties related to the high hygroscopicity of lanthanum oxide, which hinders obtaining the charge with a reproducible composition by weighing the commercially available initial chemicals, followed by their mixing and solid phase synthesis.…”

Section: Introductionmentioning

confidence: 99%

Influence of initial charge composition and growth/annealing atmospheres on the structural parameters of Czochralski-grown (Na_xGd_1−x)MoO₄crystals

et al. 2016

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The composition of microparts of sodium-gadolinium molybdate crystals, grown by the Czochralski method in different atmospheres from stoichiometric ((Na 0.5 Gd 0.5 )MoO 4 ; group I) and nonstoichiometric ((Na 2/7 Gd 4/7 ▯ 1/7 )MoO 4 (II.1) and (Na 6/15 Gd 8/15 ▯ 1/15 )MoO 4 (II.2); group II) initial charge compositions (where ▯ = vacancies), was refined by X-ray diffraction analysis. All the crystals under investigation were found to crystallize in the space group I4 1 /a without any signs of structural modulation and the refined crystal compositions were different from the initial charge compositions. Crystals from group I had a gadolinium excess and sodium deficiency without vacancies in the dodecahedral site. Vacancies were found in the Mo and O sites of the structure of the dark-gray micropart of the crystal grown in an Ar atmosphere, with the composition of the near-colorless micropart of the same crystal being close to stoichiometry. Microparts of the crystals from group II contain vacancies in both cation sites in (Na 0.348Ĳ8) Gd 0.528 ▯ 0.124 )(Mo 6+ 0.996Ĳ3) ▯ 0.004 )O 4 (II.1) and in the dodecahedral and oxygen sites in (Na 0.300Ĳ8) Gd 0.576 ▯ 0.124 )Mo 6+ (O 3.880Ĳ10) ▯ 0.120 ) (II.2). It was revealed that an additional annealing in air of the crystals grown in a slightly oxidizing atmosphere reduces the oxygen vacancies content. The possibility of growing crystals with an ordered structure depending on the ratio of the formula coefficients of components in the dodecahedral site of scheelite structure is thus discussed herein.

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Longitudinally diode-pumped 1.06-μm Nd³⁺:NaLa(MoO₄)₂laser without pump-wavelength stabilisation

Cited by 15 publications

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Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$

Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$

Growth and the Actual Compositions of Cation‐Deficient Sodium‐Gadolinium Molybdate Single Crystals

Influence of initial charge composition and growth/annealing atmospheres on the structural parameters of Czochralski-grown (Na_xGd_1−x)MoO₄crystals

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Longitudinally diode-pumped 1.06-μm Nd3+:NaLa(MoO4)2laser without pump-wavelength stabilisation

Cited by 15 publications

References 0 publications

Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$

Raman Scattering and Nd$^{3+}$ Laser Operation in NaLa(WO$_{4}$)$_{2}$

Growth and the Actual Compositions of Cation‐Deficient Sodium‐Gadolinium Molybdate Single Crystals

Influence of initial charge composition and growth/annealing atmospheres on the structural parameters of Czochralski-grown (NaxGd1−x)MoO4crystals

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Product

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Longitudinally diode-pumped 1.06-μm Nd³⁺:NaLa(MoO₄)₂laser without pump-wavelength stabilisation

Influence of initial charge composition and growth/annealing atmospheres on the structural parameters of Czochralski-grown (Na_xGd_1−x)MoO₄crystals