Saturable and excited state absorption measurements in Cr4+:LuAG single crystals

Moncorgé, R.; Manaa, H.; Deghoul, F.; Guyot, Y.; Kalisky, Y.; Pollack, S. A.; Zharikov, E. V.; Kokta, Milan R.

doi:10.1016/0030-4018(96)00349-5

Cited by 17 publications

(4 citation statements)

References 7 publications

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“…This is particularly good because Cr 3+ :YAG has high transparency at wavelengths >1200 nm. 38 As a result the single, passive laser measurement head can act as the driver for the plasma and the optical collection system for LIBS and Raman signals originating from the spark source. This kind of laser measurement head could be coupled to an optical distributor to allow many such devices to be operated from a single location.…”

Section: Future Directionsmentioning

confidence: 99%

Development of laser-induced breakdown spectroscopy sensor to assess groundwater quality impacts resulting from geologic carbon sequestration

et al. 2015

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The injection of CO 2 into deep aquifers can potentially affect the quality of groundwater supplies were leakage to occur from the injection formation or fluids. Therefore, the detection of CO 2 and/or entrained contaminants that migrate into shallow groundwater aquifers is important both to assess storage permanence and to evaluate impacts on water resources. Naturally occurring elements (i.e., Li, Sr) in conjunction with isotope ratios can be used to detect such leakage. We propose the use of laser induced breakdown spectroscopy (LIBS) as an analytical technique to detect a suite of elements in water samples. LIBS has real time monitoring capabilities and can be applied for elemental and isotopic analysis of solid, liquid, and gas samples. The flexibility of probe design and use of fiber optics make it a suitable technique for real time measurements in harsh conditions and in hard to reach places. The laboratory scale experiments to measure Li, K, Ca, and Sr composition of water samples indicate that the technique produces rapid and reliable data. Since CO 2 leakage from saline aquifers may accompany a brine solution, we studied the effect of sodium salts on the accuracy of LIBS analysis. This work specifically also details the fabrication and application of a miniature ruggedized remotely operated diode pumped solid state passively Q-switched laser system for use as the plasma excitation source for a real time LIBS analysis. This work also proposes the optical distribution of many laser spark sources across a wide area for widespread leak detection and basin monitoring.

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Section: Future Directionsmentioning

confidence: 99%

Development of laser-induced breakdown spectroscopy sensor to assess groundwater quality impacts resulting from geologic carbon sequestration

et al. 2015

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“…Yttrium aluminium garnet [Y 3 Al 5 O 12 (YAG)] is widely used as a solid state laser host medium. Crystals doped with Cr 4+ are laser active and can be used as saturable absorbers for the 1.064 lm radiation of flashpumped Nd:YAG lasers [2][3][4]. Mn 4+ (isoelectronic with Cr 3+ ) can possibly be another active lasing centre or a luminescence co-activator for rare earth ions [5].…”

Section: Introductionmentioning

confidence: 99%

Attribution of the absorption bands of ruthenium-doped yttrium gallium garnet crystals to Ru3+, Ru4+, and Ru5+ 4d-ions by MCD

et al. 2005

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“…Currently, the most widely used Cr 4+ -doped media are Y 3 Al 5 O 12 (garnet) [1] and Mg 2 SiO 4 (forsterite) [2]. In addition, according to reports, other hosts also have laser effects, including Cr 4+ -Y 2 SiO 5 [14], Cr 4+ -Ca 2 M 2 SiO 7 (M = Al, Ga) [15], Cr 4+ -CaSnOSiO 4 [16], Cr 4+ -LiMO 2 (M = Al, Ga) [17], Cr 4+ -GSGG [18], Cr 4+ -Y 3 Sc 0.5 Al 4.5 O 12 [19], Cr 4+ -Ca 2 GeO 4 [20], and Cr 4+ -LuAG [21]. However, these media have several disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Structural and Luminescent Properties and the Chromium Ion Valence of Li2CaGeO4 Crystals Doped with Cr4+ Ions

et al. 2020

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Herein, we report on the growth of Cr4+–Li2CaGeO4 crystals by the flux growth method from the flux of LiCl, as well as on the effect of doping Li2CaGeO4 with Cr4+ ions on the NIR region spectral properties and crystal structure. The results quantified the occupancy of Cr4+ in Ge4+ sites. The emission spectrum presented broad bands in the NIR region, i.e., 1000–1500 nm excited by 980 nm, with maximum peaks at 1200 nm at room temperature caused by the transition of 3T2→3A2 in Cr4+ ions. The lifetime decreased with the Cr4+ ion doping concentration, specifically from 14.038 to 12.224 ms. The chemical composition and the valence state of chromium in Li2CaGeO4 were analyzed using X-ray photoelectron spectroscopy, which showed that the chromium in Li2CaGeO4 was tetravalent and no trivalent chromium was found. Therefore, the Cr4+–Li2CaGeO4 crystal has a great potential and future in optical applications.

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Saturable and excited state absorption measurements in Cr4+:LuAG single crystals

Cited by 17 publications

References 7 publications

Development of laser-induced breakdown spectroscopy sensor to assess groundwater quality impacts resulting from geologic carbon sequestration

Development of laser-induced breakdown spectroscopy sensor to assess groundwater quality impacts resulting from geologic carbon sequestration

Attribution of the absorption bands of ruthenium-doped yttrium gallium garnet crystals to Ru3+, Ru4+, and Ru5+ 4d-ions by MCD

Investigation of the Structural and Luminescent Properties and the Chromium Ion Valence of Li2CaGeO4 Crystals Doped with Cr4+ Ions

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