Explanipedia

Watt-level polarization-maintaining Er3+: ZBLAN fiber laser tunable from 3.4 µm to 3.7 µm Open

Ammar Hideur, Tristan Guezennec, Kirill Eremeev, Pierre-Henry Hanzard, Thomas Godin , et al. · 2025

We demonstrate a linearly polarized Er3+: ZBLAN fiber laser in the dual wavelength pumping scheme for laser emission in the 3.4-3.7 µm spectral band. The laser is based on a polarization-maintaining heavily erbium-doped ZBLAN fiber dually …

Periodically extended architecture for power scaling of diode-pumped solid-state lasers: proof of concept with Pr:LiYF 4 Open

Rémi Soulard, Jean‐Louis Doualan, Amandine Baillard, Pavel Loiko, Patrice Camy · 2025

We report on a power-scaling concept for blue diode-pumped visible lasers based on a periodically extended multi-crystal cavity architecture. This design is validated using a continuous-wave praseodymium laser employing three 0.5 at.% Pr:L…

Advanced solid state lasers: feature issue introduction Open

Weidong Chen, Zsuzsanna Heiner, Pavel Loiko, Pavel Loiko, Xavier Mateos , et al. · 2025

This joint issue of Optics Express and the Journal of the Optica Society of America B (JOSA B) features 61 peer-reviewed articles, many of which are contributed by authors who participated in the International Conference of Advanced Solid …

Diode-pumped mode-locked Yb:Ca3La2(BO3)4 laser generating 35 fs pulses Open

Huang-Jun Zeng, Zhang-Lang Lin, Ge Zhang, Zhongben Pan, Pavel Loiko , et al. · 2025

We present a comprehensive study of both continuous-wave and first mode-locked operation of a diode-pumped Yb:Ca 3 La 2 (BO 3 ) 4 laser in the soliton regime. Using a 976-nm single-spatial-mode, fiber-coupled InGaAs diode laser as pump sou…

Prospects of low-phonon energy Ho:MF2 (M?=?Ca, Sr, Ba) crystals for 2-3?µm lasers Open

Ngoc B. Nguyen, Pavel Loiko, Abdelmjid Benayad, Е. Б. Дунина, Liudmila Fomicheva , et al. · 2025

We report on a comparative spectroscopic study of Ho 3+ -doped fluorite-type crystals MF 2 (where M stands for Ca, Sr, and Ba), regarding their applications in lasers emitting at 2 to 3 m. The transition intensities of Ho 3+ ions are deter…

Sub-40-fs diode-pumped ytterbium-doped mixed rare-earth calcium oxoborate laser Open

Huang-Jun Zeng, Zhang-Lang Lin, Haifeng Lin, Pavel Loiko, Lizhen Zhang , et al. · 2025

We present a detailed comparative investigation of the continuous-wave and mode-locked laser performance of a mixed rare-earth calcium oxoborate crystal, Yb:(Gd,Y)Ca 4 O(BO 3 ) 3 , abbreviated as Yb:(Gd,Y)COB, for all three principal optic…

Diode-pumped Tm:CALGO lasers operating on the 3H4 → 3H5 transition Open

Xiaoxu Yu, Zhongben Pan, Pavel Loiko, Kirill Eremeev, Hongwei Chu , et al. · 2025

The performance of the diode-pumped Tm:CALGO laser operating on the 3 H 4 → 3 H 5 Tm 3+ transition was studied in detail by employing the crystals with different Tm 3+ doping levels in the range of 1.5 at.% to 5 at.%, and Watt-level contin…

Spectroscopy and SESAM mode-locking of a disordered Yb:Gd2SrAl2O7 crystal Open

Huang-Jun Zeng, Zhang-Lang Lin, Pavel Loiko, Feifei Yuan, Ge Zhang , et al. · 2025

We report on the polarized spectroscopy, continuous-wave laser operation, and mode-locked laser performance of an ytterbium-doped disordered tetragonal rare-earth strontium aluminate crystal, Yb 3+ :Gd 2 SrAl 2 O 7 . In the continuous-wave…

Yellow stimulated emission from Dy3+-doped silica glass microspheres Open

Abhishek Sureshkumar, Jonathan Demaimay, Georges Perin, Salman Hameed, M. Guendouz , et al. · 2025

Dy 3+ -doped silica glass whispering gallery mode microspheres are fabricated by fiber fusion splicing. They present an almost ideal spherical morphology with a radius ranging from 60 to 67 µm, as determined by confocal laser microscopy. T…

Effect of doping concentration on the performance of 2.8 µm Er:CaF2 lasers Open

Venkatesan Jambunathan, Simone Normani, Pavel Loiko, Karel Veselský, liza Basyrova , et al. · 2025

The effect of rare-earth doping on the spectroscopy and mid-infrared laser performance of Er 3+ :CaF 2 crystals was investigated. An optimum doping level of 3–5 at.% was identified owing to ion clustering. Pumped by a high-brightness Yb-fi…

Kerr-lens mode-locked, diode-pumped Yb,Gd:YAP laser generating 23 fs pulses Open

Haiyu Nie, Peixiong Zhang, Pavel Loiko, Zhang-Lang Lin, Huang-Jun Zeng , et al. · 2025

We report on the generation of sub-30 fs pulses from a diode-pumped Yb,Gd:YAP laser. Using soft-aperture Kerr-lens mode-locking, soliton pulses as short as 23 fs were achieved at 1082.3 nm, with an average output power of 45 mW at a repeti…

Growth, spectroscopy and laser operation of disordered Tm,Ho:NaGd(MoO4)2 crystal Open

Ghassen Zin Elabedine, Zhongben Pan, Pavel Loiko, Hongwei Chu, Dechun Li , et al. · 2025

Quantitative analysis of cooperative upconversion in Al2O3:Yb3+ Open

Pavel Loiko, L. Agazzi, Cristine Calil Kores, Meindert Dijkstra, Dimitri Geskus , et al. · 2025

35-fs diode-pumped mode-locked ytterbium-doped multi-component alkaline-earth fluoride laser Open

Zhen Zhang, Zhiqiang Li, Pavel Loiko, Huang-Jun Zeng, Ge Zhang , et al. · 2025

We demonstrate direct generation of sub-40 fs pulses from a diode-pumped mode-locked laser using an ytterbium–yttrium codoped multi-component alkaline-earth fluoride crystal and a semiconductor saturable absorber mirror. The Yb,Y:(Ca,Sr)F …

Off-resonance intracavity up-conversion pumping architecture enabling multi-watt operation of a 2.3-µm Tm:YLF laser Open

Matthieu Glasset, Hippolyte Dupont, Lauren Guillemot, Pavel Loiko, Patrice Camy , et al. · 2025

We present an intra-cavity upconversion pumping scheme for Thulium lasers operating on the 3 H 4 → 3 H 5 transition. It is based on detuning the pump wavelength from the resonance of excited-state absorption, 3 F 4 → 3 F 2,3 , around 1 µm.…

Diode-pumped orange Sm:LiYF4 lasers emitting at 605 nm Open

Jonathan Demaimay, Pavel Loiko, Esrom Kifle, Florence Pau, Gilles Recoque , et al. · 2025

We report on the first visible orange samarium laser directly pumped by a blue 465-nm GaN semiconductor laser diode. The diode-pumped continuous-wave Sm:LiYF 4 laser delivers 23.9 mW at 605 nm ( 4 G 5/2 → 6 H 7/2 transition) with a slope e…

Swift heavy ion irradiation puts InGaN/GaN multi-quantum wells on the track for efficient green light emission Open

M. Sall, G. Sow, Amandine Baillard, Alexis Dujarrier, Lindsay Goodwin , et al. · 2025

International audience

Yellow stimulated emission from Dy$^{3+}$-doped silica glass microspheres Open

Abhishek Sureshkumar, Jonathan Demaimay, Georges Perin, Salman Hameed, M. Guendouz , et al. · 2025

Dy$^{3+}$-doped silica glass whispering gallery mode microspheres are fabricated by fiber fusion splicing. They present an almost ideal spherical morphology with a radius ranging from 60 to 67 $μ$m as determined by confocal laser microscop…

Diode-pumped Kerr-lens mode-locked Yb:MgWO4 laser Open

Haiyu Nie, Zhang-Lang Lin, Pavel Loiko, Huang-Jun Zeng, Lizhen Zhang , et al. · 2025

We present the first Kerr-lens mode-locked solid-state laser based on ytterbium-doped monoclinic magnesium monotungstate as an active medium. The diode-pumped Yb:MgWO 4 laser delivers soliton pulses as short as 32 fs at 1079 nm with a puls…

Multi-watt output power in-band-pumped Ho:KLu(WO4)2 laser Open

Sami Slimi, Xavier Mateos, Rosa Maria Solé, Magdalena Aguilo, Francesc Dı́az , et al. · 2025

Multi-watt continuous-wave operation is reported for what is believed to be the first time for an in-band-pumped Ho:KLu(WO 4 ) 2 laser emitting at 2078 nm in N m polarization. The slope efficiency reached 33.5% with respect to the incident…

Spectroscopy of Yb3+-doped multicomponent alkaline earth metal fluorides for ultrafast lasers Open

Simone Normani, Pavel Loiko, Zhen Zhang, Fengkai Ma, Dapeng Jiang , et al. · 2025

The optical spectroscopy of an ytterbium-doped multicomponent alkaline earth metal fluoride crystal Yb 3+ ,Y 3+ :(Ca,Sr)F2 was studied with the goal of developing novel gain media for ultrafast mode-locked oscillators. The contribution of …

Terbium-doped gadolinium garnet thin films grown by liquid phase epitaxy for scintillation detectors Open

Amandine Baillard, Paul-Antoine Douissard, Pavel Loiko, Thierry Martin, Eric Mathieu , et al. · 2025

Gd 3 Ga 5 O 12 :Tb single-crystalline films grown by liquid phase epitaxy represent a viable solution for scintillators providing high efficiency and sub-μm spatial resolution for X-ray imaging.

Mid-infrared emissions of Dy3+ ions in CaF2 Open

Ngoc Nguyen, Pavel Loiko, Abdelmjid Benayad, Aleksei Kornienko, Е. Б. Дунина , et al. · 2025

We report on a comprehensive spectroscopic study of singly Dy 3+ doped and Er 3+ ,Dy 3+ codoped calcium fluoride (CaF2) crystals for mid- infrared laser applications. The f-f transition probabilities of Dy 3+ were determined by the Judd-Of…

Spectroscopy of low-phonon-energy Er:La2O2S oxysulfide Open

Marine Poitou, Simone Normani, Pavel Loiko, Alain Braud, Patrice Camy , et al. · 2025

Lanthanum oxysulfide powders doped with Erbium ions were fabricated by the combustion method followed by sulfurization at 1000 °C under H 2 S + N2 atmosphere. X-ray diffraction confirms their single-phase nature (sp. gr. P-3m1 ). Raman spe…

Spectroscopy of Ho:Y2O3 transparent ceramics: Effect of YF3 addition Open

Florian Delaunay, Ngoc Nguyen, Nathan Kerkad, Rémy Boulesteix, Pavel Loiko , et al. · 2025

Transparent ceramics of Holmium-doped yttria (Ho:Y 2 O 3 ) were fabricated by Hot Isostatic Pressing at 1720 °C / 190 MPa in argon, and the effect of YF 3 addition on their microstructure, optical, vibronic and infrared emission properties…

Effect of Fluorine Addition on the Microstructure and Emission Properties of Ho:Y2o3 Transparent Ceramics Open

Florian Delaunay, Ngoc Nguyen, Nathan Kerkad, Rémy Boulesteix, Pavel Loiko , et al. · 2025

Growth, structure, spectroscopic, and laser properties of Ho-doped yttrium gallium garnet crystal Open

Sami Slimi, Haohai Yu, Huaijin Zhang, Christian Kränkel, Pavel Loiko , et al. · 2024

We report on the growth of a 2.86 at.% Ho:YGG crystal using the optical floating zone technique in an oxygen-rich environment, followed by the study of its structure, optical spectroscopy and first demonstration of continuous-wave laser op…

Fabrication and luminescent properties of erbium‐doped Y 2 O 3 –MgO and Gd 2 O 3 –MgO nanocomposite ceramics Open

Stanislav Balabanov, Д. А. Пермин, Simone Normani, Alexander Belyaev, В. А. Кошкин , et al. · 2024

We report on the fabrication and optical properties of erbium‐doped Y 2 O 3 –MgO and Gd 2 O 3 –MgO nanocomposite ceramics, with a particular focus on their mid‐infrared emission. The ceramics were fabricated by a self‐propagating high‐temp…

10-watt diode-pumped red Pr:ZBLAN double-clad fiber laser Open

Esrom Kifle, Amandine Baillard, Pavel Loiko, Thibaud Berthelot, Franck Joulain , et al. · 2024

We report on a continuous-wave (CW) praseodymium fluoride fiber laser delivering 10-watt level output power in the red spectral range. It employs a double-clad 0.8 mol% PrF 3 -doped ZBLAN fiber as a gain medium and a high-power fiber-coupl…

Deep-red planar waveguide laser operation of Eu3+:KY(WO4)2 layers Open

Amandine Baillard, Jı Eun Bae, Mailyn Ceballos, Pavel Loiko, Rosa Maria Solé , et al. · 2024

We report on the first deep-red europium planar waveguide laser. It employs 30-µm thick heavily-doped 11.5 at.% Eu:KY(WO 4 ) 2 layers grown by liquid phase epitaxy on undoped substrates using K 2 W 2 O 7 as a solvent. When pumped with a gr…

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