Ytterbium calcium fluoride waveguide laser

Loiko, Pavel; Soulard, Rémi; Kifle, Esrom; Guillemot, Lauren; Brasse, Gurvan; Benayad, Abdelmjid; Braud, Alain; Aguiló, Magdalena; Díaz, Francesc; Mateos, Xavier; Camy, Patrice

doi:10.1364/oe.27.012647

Cited by 18 publications

(9 citation statements)

References 42 publications

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“…Oxygen-assisted sites. In our previous study of 1.4 at.% Yb:CaF2 epitaxial layers grown using another solvent (CaCl2), it was evidenced that a significant fraction of Yb 3+ ions is located in isolated sites [22]. The assemblage of Yb 3+ species was as following: isolated sites (C3v(T2) -predominantly, Ohwell-detected and C4vminor fraction) and clusters.…”

Section: Isolated Ions: Discussionmentioning

confidence: 89%

“…However, the grown layers had a thickness of only few μm. The LPE growth of Yb 3+ -and Tm 3+ -doped CaF2 layers was first reported in [30,31] and first laser operation was achieved in Yb:CaF2 thin-films in the planar waveguide geometry [22].…”

Section: Introductionmentioning

confidence: 99%

“…Its growth process by the Czochralski method is well-developed [20] and undoped oriented substrates are well available at reasonable costs (note that CaF2 is a widely-used material for optical components). CaF2 can be doped with rare-earth ions (RE 3+ ) up to relatively high concentrations which is accompanied by an increase of the refractive index [21], so that RE 3+ :CaF2 / CaF2 homoepitaxies show light guiding [22]. The isotropic and attractive thermal properties of CaF2 alleviate the thermal effects.…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

Loiko

Brasse

Basyrova

et al. 2021

Journal of Luminescence

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Thulium-doped calcium fluoride (Tm:CaF2) single-crystalline films are grown on (100)-oriented undoped bulk CaF2 substrates by Liquid Phase Epitaxy (LPE) using LiF as a solvent. Their spectroscopic properties are studied in details. For ~2 at.% Tm-doped films, the active ions are predominantly isolated and are located in oxygen-assisted trigonal sites, C3v(T2). With increasing the Tm doping level, ion clustering is promoted but it is slowed down as compared to bulk crystals. For ~6 at.% Tm-doped films, the majority of active ions form clusters resulting in a "glassy-like" spectroscopic behavior (smooth and broad spectral bands). For such layers, the maximum stimulated-emission cross-section for the 3 F4 → 3 H6 transition is 0.14×10 -20 cm 2 at 1856 nm, the luminescence lifetime of the 3 F4 state is 21.70 ms and the emission bandwidth exceeds 180 nm. The transition probabilities of Tm 3+ ions are determined using the Judd-Ofelt theory. The waveguiding properties of the Tm:CaF2 films are confirmed. Highly-doped Tm:CaF2 epitaxial films are promising for waveguide lasers at ~2 μm.

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Section: Isolated Ions: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

Loiko

Brasse

Basyrova

et al. 2021

Journal of Luminescence

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“…Ren et al fabricated buried channel WGs in bulk Yb 3+ ,Na + :CaF 2 by ultrafast laser inscription (ULI) and achieved 174 mW at ~1.01 μm with an optical-to-optical efficiency of 45.3% [25]. Molecular beam epitaxy (MBE) [26] and LPE [27] growth of Yb 3+ -doped CaF 2 films was reported and laser operation in planar waveguide geometry was achieved: Loiko et al obtained 114 mW at 1.04 nm with a slope efficiency of 12.9% [28]. However, these studies have not fully exploited the power scaling capabilities of calcium fluoride and intrinsically high slope efficiencies of Yb 3+ laser scheme based on resonant pumping.…”

Section: Introductionmentioning

confidence: 99%

Efficient wavelength-tunable deep-diced ridge waveguide lasers in bulk Yb3+:CaF2 crystal

et al. 2021

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Channel (ridge) waveguides are produced in bulk 4.5 at.% Yb 3+ :CaF 2 crystals by "deep" diamond saw dicing. They possess a rectangular profile with high aspect ratio (a width of 10-50 μm and a depth of 200 μm) and good verticality. The r.m.s. surface roughness of the diced side walls is only 0.5 nm. The waveguide propagation losses are as low as 0.13 ± 0.05 dB/cm at ~1 μm (for the 40 μm wide waveguide and TM-polarization) and they slightly increase for narrower structures. A continuous-wave Yb 3+ :CaF 2 waveguide laser generated a maximum output power of 723 mW at 1029-1051 nm with a slope efficiency η of 76.0% (vs. the absorbed pump power), a laser threshold of 165 mW, and slightly multimode laser output (M 2 x = 1.05, M 2 y = 1.3). The waveguides exhibited lower propagation losses and better laser performance for TM polarized pump (as compared to TE polarized one). The laser emission was partially polarized. The waveguide laser allowed for continuous wavelength tuning between 1009 and 1072 nm (tuning range: 63 nm). The developed waveguides are promising for compact and integrated mode-locked sources at ~1 μm.

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“…At the same time, waveguide‐based pulsed lasing has attracted more and more attention in recent years. [ 27–33 ] Femtosecond laser writing has emerged as a powerful tool to fabricate 3D microstructures inside the transparent functional materials. [ 34–38 ] With the light confinement within the microstructures, the intracavity light intensity can be greatly enhanced with lower lasing thresholds and enhanced slope efficiencies compared with bulk systems.…”

Section: Introductionmentioning

confidence: 99%

Near‐Infrared All‐Optical Switching Based on Nano/Micro Optical Structures in YVO₄ Matrix: Embedded Plasmonic Nanoparticles and Laser‐Written Waveguides

Pang

et al. 2020

Advanced Photonics Research

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Nonlinear interactions between light and matter give rise to a wide range of applications for both fundamental and applied research. Herein, near‐infrared switching of the optical response based on embedded Ag nanoparticles and laser‐written optical waveguides within yttrium vanadate (YVO4) crystal matrix is demonstrated. Using broadband transient absorption spectroscopy with a combination of femtosecond Z‐scan spectroscopy, the plasmon‐enhanced features of the third‐order optical nonlinearity in Ag:YVO4 nanocomposite at the near‐infrared band are elucidated. Meanwhile, an optical‐lattice‐like microscale waveguide is fabricated with well‐preserved photoluminescence properties by femtosecond laser writing. Taking advantage of the ultrafast on–off switching behavior of Ag:YVO4 saturable absorber, a Q‐switched pulsed laser operation in the waveguide platform, delivering 1 μm light pulses with high peak power of 298 mW, is demonstrated. This work indicates a possible path for the development of chip‐scale ultrafast photonic devices.

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Ytterbium calcium fluoride waveguide laser

Cited by 18 publications

References 42 publications

Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

Efficient wavelength-tunable deep-diced ridge waveguide lasers in bulk Yb3+:CaF2 crystal

Near‐Infrared All‐Optical Switching Based on Nano/Micro Optical Structures in YVO₄ Matrix: Embedded Plasmonic Nanoparticles and Laser‐Written Waveguides

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Ytterbium calcium fluoride waveguide laser

Cited by 18 publications

References 42 publications

Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

Efficient wavelength-tunable deep-diced ridge waveguide lasers in bulk Yb3+:CaF2 crystal

Near‐Infrared All‐Optical Switching Based on Nano/Micro Optical Structures in YVO4 Matrix: Embedded Plasmonic Nanoparticles and Laser‐Written Waveguides

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Product

Resources

About

Near‐Infrared All‐Optical Switching Based on Nano/Micro Optical Structures in YVO₄ Matrix: Embedded Plasmonic Nanoparticles and Laser‐Written Waveguides