Diode-pumped Er:CaF_2 ceramic 27 μm tunable laser

Šulc, Jan; Němec, Michal; Švejkar, Richard; Jelı́nková, Helena; Doroshenko, Maxim E.; Федоров, П. П.; Осико, В. В.

doi:10.1364/ol.38.003406

Cited by 57 publications

(17 citation statements)

References 17 publications

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“…The laser performance of the as-synthesized laser ceramics is similar to single crystal with the same component while the fracture toughness is 1.75 times higher than that of single crystal [16]. Thereafter, Yb 3+ : CaF2 ceramics [17], Nd 3+ : SrF2 [18], Tm: CaF2 [19], and Er 3+ : CaF2 [20] hot-formed transparent ceramics were also prepared by deforming single crystal. However, there have not been any studies into fabrication nor investigation of the optical and mechanical properties of the hot-formed laser ceramics with different deformation rate, hot-pressed laser ceramics prepared by nano-powder, and single crystal with the same component.…”

Section: Methodsmentioning

confidence: 99%

Study in Optical and Mechanical Properties of Nd3+, Y3+: SrF2 Transparent Ceramics Prepared by Hot-Pressing and Hot-Forming Techniques

et al. 2019

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Nd3+, Y3+: SrF2 transparent ceramics were successfully synthesized by two methods: hot-forming and hot-pressing techniques. The mechanical properties and optical properties of the hot-formed Nd3+, Y3+: SrF2 transparent ceramics were much better than that of single crystal. On the other hand, the transmittance of the hot-formed transparent ceramics with different deformation rate reached up to 90% at 1054 nm, which is superior to the hot-pressed ceramics. Furthermore, the fracture toughness of hot-formed Nd3+, Y3+: SrF2 transparent ceramics with the deformation rate of 51% reached up to 0.70 MPa m1/2, which is nearly 1.5 times higher than that of as-grown single crystal. The full width at half maximum (FWHM) of the hot-formed ceramic is larger than that of the single crystal at 1053 nm under continuous-wave (CW) laser operation. The thermal conductivity of Nd3+, Y3+: SrF2 single crystal and hot-formed ceramics were also discussed.

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Section: Methodsmentioning

confidence: 99%

Study in Optical and Mechanical Properties of Nd3+, Y3+: SrF2 Transparent Ceramics Prepared by Hot-Pressing and Hot-Forming Techniques

et al. 2019

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“…Moreover, when trivalent erbium ions are incorporated in CaF 2 matrix lattice, its relatively low phonon frequency (~322 cm −1 ) reduces the nonradiative relaxation process between adjacent energy levels, and thus a high‐efficiency upconversion and infrared emission can be obtained. Many studies on Er‐doped CaF 2 materials, such as nanopowders, single crystals, and glass‐ceramics have been reported, and Er:CaF 2 transparent ceramics were also fabricated by hot‐pressing (HP) single crystals. The purpose of this work was to demonstrate the feasibility of using nanoparticles as starting material through a hot‐pressing process to make transparent Er:CaF 2 ceramics.…”

Section: Introductionmentioning

confidence: 99%

Optical Characterizations of Hot‐Pressed Erbium‐Doped Calcium Fluoride Transparent Ceramic

et al. 2014

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Nanoparticles of erbium-doped calcium fluoride were synthesised by the coprecipitation method. Micromorphology of the obtained nanoparticles was observed by transmission electron microscopy. The nanoparticles were hot-pressed in a vacuum environment to achieve Er:CaF 2 transparent ceramic. X-ray diffraction analysis confirmed the crystallization of a single fluorite phase after sintered. Transmittance spectrum of Er: CaF 2 ceramic sample was measured, and the transmittance at 1200 nm reached about 87%. Microstructures were characterized using field-emission scanning electron microscopy. The luminescence spectrum of Er:CaF 2 transparent ceramics under 488-and 978-nm excitation was measured and discussed. It was evidenced that strong cross-relaxation processes between Er 3+ ions occur at high dopant concentration, and favoring the red emission at the expense of the green one.

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“…Mid-infrared lasers, operating roughly within the 2.5–3 μm spectral range, are a research focus in the solid-state laser field because of their potential applications in medicine, biological processing, remote sensing, and pollution monitoring [1,2,3,4]. The thermal effect [5], especially the thermal lens effect of laser gain medium materials [6], seriously deteriorates the output power and beam quality of mid-infrared solid-state lasers in operation.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Sintering Behavior of Er:SrF2 Transparent Ceramics using Chemically Derived Powder

Liu

Wang

et al. 2018

Materials

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In this paper, we report the fabrication of high-quality 5 at. % Er3+ ions doped SrF2 transparent ceramics, the potential candidate materials for a mid-infrared laser-gain medium by hot-pressing at 700 °C for 40 h using a chemically-derived powder. The phase structure, densification, and microstructure evolution of the Er:SrF2 ceramics were systematically investigated. In addition, the grain growth kinetic mechanism of Er:SrF2 was clarified. The results showed lattice diffusion to be the grain growth mechanism in the Er:SrF2 transparent ceramic of which highest in-line transmittance reached 92% at 2000 nm, i.e., very close to the theoretical transmittance value of SrF2 single crystal. Furthermore, the emission spectra showed that the strongest emission band was located at 2735 nm. This means that it is possible to achieve a laser output of approximately 2.7 μm in the 5 at. % Er3+ ions doped SrF2 transparent ceramics.

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Diode-pumped Er:CaF_2 ceramic 27 μm tunable laser

Cited by 57 publications

References 17 publications

Study in Optical and Mechanical Properties of Nd3+, Y3+: SrF2 Transparent Ceramics Prepared by Hot-Pressing and Hot-Forming Techniques

Study in Optical and Mechanical Properties of Nd3+, Y3+: SrF2 Transparent Ceramics Prepared by Hot-Pressing and Hot-Forming Techniques

Optical Characterizations of Hot‐Pressed Erbium‐Doped Calcium Fluoride Transparent Ceramic

Fabrication and Sintering Behavior of Er:SrF2 Transparent Ceramics using Chemically Derived Powder

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