Blue emission in Ti-sapphire laser crystals

AbstractExpanding the crystal field in terms of operators that transform as the irreducible representations of the Td group leads to an intuitive interpretation of the crystal-field parameters. We apply this method to the crystal field experienced by Nd3+ dopants in the laser crystals YLiF4, YVO4, and KLiYF5.

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Sapphire Laser Machining Modeling and Experimental Validation for High Temperature Pressure Transducer Development

56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference ◽

10.2514/6.2015-0131 ◽

2015 ◽

Author(s):

William S. Oates ◽

Peter Woerner

Keyword(s):

High Temperature ◽

Pressure Transducer ◽

Experimental Validation ◽

Sapphire Laser ◽

Laser Machining

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Development of a Tunable Mode-Locked Titanium Sapphire Laser.

10.21236/ada303043 ◽

1995 ◽

Author(s):

Odis P. McDuff

Keyword(s):

Sapphire Laser

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Blue Emitting BaAl2O4:Ce3+ Nanophosphors with High Color Purity and Brightness for White LEDs

Microscopy and Microanalysis ◽

10.1017/s1431927619014958 ◽

2019 ◽

Vol 25 (6) ◽

pp. 1466-1470 ◽

Cited By ~ 1

Author(s):

Rituparna Chatterjee ◽

Subhajit Saha ◽

Karamjyoti Panigrahi ◽

Uttam Kumar Ghorai ◽

Gopes Chandra Das ◽

...

Keyword(s):

Electron Microscopy ◽

Field Emission ◽

Sol Gel ◽

Blue Emission ◽

Diffraction Field ◽

White Leds ◽

Display Devices ◽

Transmission Electron ◽

Structure Morphology ◽

The Impact

AbstractIn this work, strongly blue emitting Ce3+-activated BaAl2O4 nanophosphors were successfully synthesized by a sol–gel technique. The crystal structure, morphology, and microstructure of the nanophosphors have been studied by X-ray powder diffraction, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. The photoluminescence spectra show the impact of concentration variation of Ce3+ on the photoluminescence emission of the phosphor. These nanophosphors display intense blue emission peaking at 422 nm generated by the Ce3+ 5d → 4f transition under 350 nm excitation. Our results reveal that this nanophosphor has the capability to take part in the emergent domain of solid-state lighting and field-emission display devices.

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Polymer Thermal Treatment Production of Cerium Doped Willemite Nanoparticles: An Analysis of Structure, Energy Band Gap and Luminescence Properties

Materials ◽

10.3390/ma14051118 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1118

Author(s):

Ibrahim Mustapha Alibe ◽

Khamirul Amin Matori ◽

Mohd Hafiz Mohd Zaid ◽

Salisu Nasir ◽

Ali Mustapha Alibe ◽

...

Keyword(s):

Solid State ◽

Thermal Treatment ◽

Band Gap ◽

Optical Band Gap ◽

Dopant Concentration ◽

Blue Emission ◽

Green Emission ◽

Band Gap Energy ◽

Solid State Lighting ◽

Gap Energy

The contemporary market needs for enhanced solid–state lighting devices has led to an increased demand for the production of willemite based phosphors using low-cost techniques. In this study, Ce3+ doped willemite nanoparticles were fabricated using polymer thermal treatment method. The special effects of the calcination temperatures and the dopant concentration on the structural and optical properties of the material were thoroughly studied. The XRD analysis of the samples treated at 900 °C revealed the development and or materialization of the willemite phase. The increase in the dopant concentration causes an expansion of the lattice owing to the replacement of larger Ce3+ ions for smaller Zn2+ ions. Based on the FESEM and TEM micrographs, the nanoparticles size increases with the increase in the cerium ions. The mean particles sizes were estimated to be 23.61 nm at 1 mol% to 34.02 nm at 5 mol% of the cerium dopant. The optical band gap energy of the doped samples formed at 900 °C decreased precisely by 0.21 eV (i.e., 5.21 to 5.00 eV). The PL analysis of the doped samples exhibits a strong emission at 400 nm which is ascribed to the transition of an electron from localized Ce2f state to the valence band of O2p. The energy level of the Ce3+ ions affects the willemite crystal lattice, thus causing a decrease in the intensity of the green emission at 530 nm and the blue emission at 485 nm. The wide optical band gap energy of the willemite produced is expected to pave the way for exciting innovations in solid–state lighting applications.

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Multifunctional Optical Crystals for All-Solid-State Raman Lasers

Crystals ◽

10.3390/cryst11020114 ◽

2021 ◽

Vol 11 (2) ◽

pp. 114

Author(s):

Hui Zhao ◽

Shibo Dai ◽

Siqi Zhu ◽

Hao Yin ◽

Zhen Li ◽

...

Keyword(s):

Solid State ◽

Continuous Wave ◽

Frequency Doubling ◽

Raman Laser ◽

Rare Earth Ions ◽

Excellent Performance ◽

The Past ◽

Raman Lasers ◽

Optical Crystals ◽

Laser Crystals

In the past few decades, the multifunctional optical crystals for all-solid-state Raman lasers have been widely studied by many scholars due to their compactness, convenience and excellent performance. In this review, we briefly show two kinds of multifunctional Raman crystals: self-Raman (laser and Raman effects) crystals and self-frequency-doubled Raman (frequency-doubling and Raman effects) crystals. We firstly introduce the properties of the self-Raman laser crystals, including vanadate, tungstate, molybdate and silicate doped with rare earth ions, as well as self-frequency-doubled Raman crystals, including KTiOAsO4 (KTA) and BaTeMo2O9 (BTM). Additionally, the domestic and international progress in research on multifunctional Raman crystals is summarized in the continuous wave, passively Q-switched, actively Q-switched and mode-locked regimes. Finally, we present the bottleneck in multifunctional Raman crystals and the outlook for future development. Through this review, we contribute to a general understanding of multifunctional Raman crystals.

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