High efficiency emission of a laser based on Yb-doped (Lu,Y)2O3 ceramic

Toci, Guido; Pirri, Angela; Patrizi, Barbara; Maksimov, R.N.; Осипов, В. В.; Шитов, В. А.; Yurovskikh, А. S.; Vannini, Matteo

doi:10.1016/j.optmat.2018.06.006

Cited by 28 publications

(27 citation statements)

References 27 publications

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“…This approach was used in previous laser tests with a similar setup. 8,9,15 As it will be shown in the following part, this strongly reduces the actual losses induced by the Fresnel reflection.…”

Section: Methodsmentioning

confidence: 86%

“…In the laser tests, the sample was then carefully aligned with its faces perpendicular to the cavity axis, so that the Fresnel reflections are superimposed to the laser mode of the cavity and contribute to the laser feedback. This approach was used in previous laser tests with a similar setup . As it will be shown in the following part, this strongly reduces the actual losses induced by the Fresnel reflection.…”

Section: Methodsmentioning

confidence: 98%

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Fabrication and laser operation of Yb:Lu₂O₃ transparent ceramics from co‐precipitated nano‐powders

et al. 2019

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In this article, 5 at.% Yb:Lu2O3 transparent ceramics were fabricated by vacuum sintering combined with hot isostatic pressing (HIP) posttreatment using co‐precipitated nano‐powders. The influence of precipitant molar ratio, ammonium hydrogen carbonate, to metal ions (AHC/M3+, R value) on the properties of Yb:Lu2O3 precursors and calcined powders was investigated systematically. It was found that the powders with different R value calcined at 1100°C for 4 hours were pure cubic Lu2O3 but the morphologies of precursors and powders behaved differently. The opaque samples pre‐sintered at 1500°C for 2 hours grew into transparent ceramics after HIP posttreatment at 1750°C for 1 hour. The final ceramic with R = 4.8 showed the best optical quality with the in‐line transmittance of 79.7% at 1100 nm. The quasi‐CW laser operation was performed at 1034 nm and 1080 nm with a maximum output power up to 8.15 W as well as a corresponding slope efficiency of 58.4%.

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Section: Methodsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 98%

Fabrication and laser operation of Yb:Lu₂O₃ transparent ceramics from co‐precipitated nano‐powders

et al. 2019

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“…The ceramics were cut and laser‐level polished to be a parallelepiped with a size of 3.2 × 4 × 5 mm; the 3.2 × 4 mm surface is used as the incident plane of pump light. The sample is tested using the laser cavity layout shown in Figure , which is similar to the layout used for Yb‐doped materials . The cavity is end pumped.…”

Section: Resultsmentioning

confidence: 99%

“…The sample is tested using the laser cavity layout shown in Figure 15, which is similar to the layout used for Yb-doped materials. 37 The cavity is end pumped. The sample is welded by a sheet of indium on a copper heat sink and cooled by water at 17°C.…”

Section: Resultsmentioning

confidence: 99%

Fabrication, microstructure, and optical properties of Tm:Y₃ScAl₄O₁₂ laser ceramics

et al. 2019

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Transparent 4 at.% Tm:Y3ScAl4O12 (Tm:YSAG) laser ceramics were fabricated by solid‐state reaction combined with vacuum sintering method. The 4 at.% Tm:YSAG ceramic sample sintered at 1800°C for 30 hours possesses homogenous microstructure and excellent optical properties, showing a transmittance of 79.3% at 2000 nm. The absorption and emission spectra of the Tm:YSAG ceramics are studied and compared with those of 4 at.% Tm:Y3Al5O12 ceramics. The introduction of Sc3+ greatly affects the energy levels of the Tm3+, causing the disappearance and degeneration of some absorption and emission peaks in the middle infrared region. The laser performance of the 4 at.% Tm:YSAG ceramics is also tested in the Quasi‐continuous‐wave (QCW) mode by pumping with a 790 nm laser diode (LD). A maximum laser output power of 0.54 W with a slope efficiency of 4.8% is achieved, which is the first laser output for Tm:YSAG ceramics.

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“…In the ceramic consisting of 0.95[(Yb 0.05 Lu 0.15 Y 0.80 ) 2 O 3 ] + 0.05ZrO 2 with a content of the sintering additive ZrO 2 reduced to 5 mol%, the "orange peel" is not clearly manifested. While investigating the generation properties [45], it was found that the laser generation band on this ceramic (Figure 12) practically coincides with the IR-luminescence band (Figure 11, right), its width reaches 97 nm at the base, which is currently a record value in the visible and near-IR wavelengths. On this entire band, quasi-continuous generation with a slope efficiency equal to 49.3% and 51.2% in the band maxima at the wavelengths of 1077 and 1032 nm, respectively, was obtained.…”

Section: Ceramics With Disordered Crystalline Structurementioning

confidence: 87%

From the Laser Plume to the Laser Ceramics

Осипов¹,

Платонов²,

Шитов³

et al. 2021

Advanced Ceramic Materials

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The main stages of preparation of ceramic active elements of solid-state lasers are considered. The physical principles of laser synthesis of nanopowders are described. The features and processes taking place during compaction and compacts sintering are specified. Also we report on the investigation of characteristics of highly transparent ceramics on the basis of nanopowders synthesized in laser plume. It is shown that this approach enables to increase the “orange peel” formation threshold in the ceramics with strongly disordered crystalline structure. It opens the road to relatively simple synthesis technology from oxide materials and application of this ceramics as the gain media with oscillation efficiency higher than 50% and also leads to simplification of the synthesis technology of magnetoactive ceramics and to production of highly transparent YAG samples without the use of sintering heterovalent additives.

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High efficiency emission of a laser based on Yb-doped (Lu,Y)2O3 ceramic

Cited by 28 publications

References 27 publications

Fabrication and laser operation of Yb:Lu₂O₃ transparent ceramics from co‐precipitated nano‐powders

Fabrication and laser operation of Yb:Lu₂O₃ transparent ceramics from co‐precipitated nano‐powders

Fabrication, microstructure, and optical properties of Tm:Y₃ScAl₄O₁₂ laser ceramics

From the Laser Plume to the Laser Ceramics

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High efficiency emission of a laser based on Yb-doped (Lu,Y)2O3 ceramic

Cited by 28 publications

References 27 publications

Fabrication and laser operation of Yb:Lu2O3 transparent ceramics from co‐precipitated nano‐powders

Fabrication and laser operation of Yb:Lu2O3 transparent ceramics from co‐precipitated nano‐powders

Fabrication, microstructure, and optical properties of Tm:Y3ScAl4O12 laser ceramics

From the Laser Plume to the Laser Ceramics

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Product

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Fabrication and laser operation of Yb:Lu₂O₃ transparent ceramics from co‐precipitated nano‐powders

Fabrication and laser operation of Yb:Lu₂O₃ transparent ceramics from co‐precipitated nano‐powders

Fabrication, microstructure, and optical properties of Tm:Y₃ScAl₄O₁₂ laser ceramics