Calcium lithium niobium gallium garnet crystals activated with Er<sup>3</sup>and Cr<sup>3+</sup>as a new active medium for 3-μ lasers

Voron’ko, Yu. K.; Gessen, S B; Es'kov, N A; Осико, В. В.; Sobol, A. A.; Ushakov, S. N.; Tsymbal, L. I.

doi:10.1070/qe1990v020n06abeh006668

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Laser operation of CNGG crystals was first studied in flash lamp pumped optical cavities when codoped with Cr 3+ (as activator) and Nd, Tm, Ho, or Er . Similarly, laser properties were also found for the isostructural Ca 3 (Ta 1.5 Ga 0.5 )Ga 3 O 12 , CTGG, crystal as well as for Li modifications of the two crystals above, i.e., CLNGG and CLTGG.…”

Section: Introductionmentioning

confidence: 95%

Na Modification of Lanthanide Doped Ca₃Nb_1.5Ga_3.5O₁₂-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Castellano‐Hernández

Serrano

Riobóo

et al. 2016

Crystal Growth & Design

View full text Add to dashboard Cite

The Na+-Yb3+ (or Er3+) co-substitution of Ca2+ in Ca3Nb1.5Ga3.5O12 (CNGG) laser crystal is studied. In contrast to other garnets whose structural disorder is exclusively based on the presence of differently sized cations on the same crystal sites, Na+ incorporated in the dodecahedral site (a site also shared by Ca2+ and trivalent lanthanides) creates diverse electric charge distributions over the dodecahedral sublattice, which adds to the disorder associated with Nb5+ and Ga3+ simultaneous occupation of the octahedral and tetrahedral sites. The currently determined cationic compositions of Czochralski grown congruent CNGG and Na-modified CNGG crystals show that Na+ incorporation reduces the cationic vacancy concentration on dodecahedral and octahedral sites but does not affect that in tetrahedral sites. Physical properties of interest for laser design (optical transmission, elastic constants, hardness, specific heat, thermal conductivity, thermal expansion, refractive index dispersion, group velocity dispersion, and thermo optic coefficients) have been systematically determined at cryogenic temperatures and above room temperature. Na+ incorporation into CNGG decreases the crystal growth temperature, promotes Yb3+ doping, and importantly, increases the Yb3+ optical bandwidth, offering good prospects for the implementation of ultrashort pulses in mode-locked laser oscillators.

show abstract

Section: Introductionmentioning

confidence: 95%

Na Modification of Lanthanide Doped Ca₃Nb_1.5Ga_3.5O₁₂-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Castellano‐Hernández

Serrano

Riobóo

et al. 2016

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…Laser emission in Er 3 þ -doped CNGG and CLNGG was studied on transition 4 I 11=2 -4 I 13=2 [8]. Research of the spectroscopic properties of these erbium-doped materials is in progress.…”

Section: Introductionmentioning

confidence: 99%

Excited-state absorption in erbium-doped calcium lithium niobium gallium garnet

Toma

Georgescu

2014

Journal of Luminescence

View full text Add to dashboard Cite

Calcium lithium niobium gallium garnet crystals activated with Cr³⁺, Tm³⁺, and Ho³⁺ions as a new active medium for λ ≈ 2 μm lasers

Voron’ko¹,

Gessen²,

Es'kov³

et al. 1990

Sov. J. Quantum Electron.

Self Cite

View full text Add to dashboard Cite

A novel design of an Earth field digital fluxgate magnetometer is presented, the small magnetometer in low-mass experiment (SMILE). The combination of a number of new techniques results in significant miniaturization of both sensor and electronics. The design uses a sensor with volume compensation, combining three dual rod cores in a Macor R cube with the side dimension of 20 mm. Use of volume compensation provides high geometrical stability of the axes and improved performance compared to component compensated sensors. The sensor is operated at an excitation frequency of 8 kHz. Most of the instrument functionality is combined in a digital signal processing core, implemented in a field programmable gate array (FPGA). The pick-up signal is digitized after amplification and filtering, and values of compensation currents for each of the axes are determined by a digital correlation algorithm, equivalent to a matched filter, and are fed to a hybrid pulse-width modulation/delta-sigma digital-to-analogue converter driving the currents through the compensation coils. Using digital design makes the instrument very flexible, reduces power consumption and opens possibilities for the customization of the operation modes. The current implementation of the design is based on commercial off-the-shelf components. A calibration of the SMILE instrument was carried out at the Nurmijärvi Geophysical Observatory, showing high linearity (within 6 nT on the whole ±50 µT scale), good orthogonality (22 arcmin) and very good temperature stability of the axes.

show abstract

Calcium lithium niobium gallium garnet crystals activated with Er³and Cr³⁺as a new active medium for 3-μ lasers

Cited by 3 publications

References 0 publications

Na Modification of Lanthanide Doped Ca₃Nb_1.5Ga_3.5O₁₂-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Na Modification of Lanthanide Doped Ca₃Nb_1.5Ga_3.5O₁₂-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Excited-state absorption in erbium-doped calcium lithium niobium gallium garnet

Calcium lithium niobium gallium garnet crystals activated with Cr³⁺, Tm³⁺, and Ho³⁺ions as a new active medium for λ ≈ 2 μm lasers

Contact Info

Product

Resources

About

Calcium lithium niobium gallium garnet crystals activated with Er3and Cr3+as a new active medium for 3-μ lasers

Cited by 3 publications

References 0 publications

Na Modification of Lanthanide Doped Ca3Nb1.5Ga3.5O12-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Na Modification of Lanthanide Doped Ca3Nb1.5Ga3.5O12-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Excited-state absorption in erbium-doped calcium lithium niobium gallium garnet

Calcium lithium niobium gallium garnet crystals activated with Cr3+, Tm3+, and Ho3+ions as a new active medium for λ ≈ 2 μm lasers

Contact Info

Product

Resources

About

Calcium lithium niobium gallium garnet crystals activated with Er³and Cr³⁺as a new active medium for 3-μ lasers

Na Modification of Lanthanide Doped Ca₃Nb_1.5Ga_3.5O₁₂-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Na Modification of Lanthanide Doped Ca₃Nb_1.5Ga_3.5O₁₂-Type Laser Garnets: Czochralski Crystal Growth and Characterization

Calcium lithium niobium gallium garnet crystals activated with Cr³⁺, Tm³⁺, and Ho³⁺ions as a new active medium for λ ≈ 2 μm lasers