Transparent glass-ceramics doped by chromium(III): Spectroscopic properties and characterization of crystalline phases

Reisfeld, R.; Kisilev, A.; Buch, A.; Ish-Shalom, M.

doi:10.1016/s0022-3093(87)80344-7

Cited by 37 publications

(16 citation statements)

References 19 publications

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“…4 A 2 (F), R-line) and another intense broad band from 14,500 to 11,100 cm À1 (700-850 nm) centered at 12,790 cm À1 (782 nm) ( 4 T 2 (F) ? 4 A 2 (F)), due to Cr 3+ electronic transitions which depend on the crystal field strength of the host lattice [18,19,37], but also strongly affected by energy transfer from single Cr 3+ ions to pairs [38] and the thermal population of the 4 T 2 (F) level [12,39].…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

“…4 A 2 (F), leading to an increased thermal population of the 4 T 2 (F) level responsible for the intense broadband spectra observed at room temperature [12,39]. Additionally the low intensity of the R-line can be related to energy transfer from single Cr 3+ ions to pairs leading to an increase of the 12,790 cm À1 (782 nm) emission for higher Cr 3+ concentrations [38]. For the sake of comparison with the results presented in this work, the same behavior was observed in emission spectra for other glassy and crystalline systems with Cr 3+ in high-field sites.…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

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EPR, optical absorption and luminescence studies of Cr3+-doped antimony phosphate glasses

et al. 2014

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Section: Photoluminescence Studiesmentioning

confidence: 99%

Section: Photoluminescence Studiesmentioning

confidence: 99%

EPR, optical absorption and luminescence studies of Cr3+-doped antimony phosphate glasses

et al. 2014

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“…In particular, optically transparent sitalls can be prepared with r < 30 nm and Δn < 0.3 [35]. It was shown in 1987 that sitalls can be doped with Cr 3+ ions and that such material is interesting as a luminescing convertor of solar radiation [36,37]. Later, optical properties of sitalls with Cr 4+ [38,39], Ni 2+ [38,40,41], Co 2+ [32,34,[42][43][44][45][46] ions and then with rare-earth ions [47][48][49][50] began to be investigated.…”

Section: Crystalline and Glassy-crystalline Matrices For Tc Transitiomentioning

confidence: 99%

Saturable absorbers based on tetrahedrally coordinated transition-metal ions in crystals (Review)

Malyarevich

Yumashev

2009

J Appl Spectrosc

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Published data on spectroscopic characteristics of saturable absorbers based on crystals doped with tetrahedrally coordinated transition-metal ions (Cr 2+ , Cr 4+ , Cr 5+ , V 3+ , Cr 2+ , Fe 2+ ) in addition to their use as passive Q-switches for solid-state lasers emitting in the visible and near-infrared regions are reviewed.Introduction. The use of saturable absorbers (SA) as passive Q-switches (PS) in solid-state lasers is an effective method for generating nanosecond and subnanosecond light pulses. This method differs favorably from active control of laser cavity gain by the lack of mechanical perturbations of the optical devices, additional sources of power supply, and external electrical control circuits. This simplifies the construction and operation of the laser and reduces its cost. Compact solid-state mini-lasers and ultra-small lasers (so-called microchip lasers) can be fabricated if PS are used.A SA is an optical material for which the transmission increases with increasing power density of the incident radiation. The SA should satisfy several requirements in order to be used as a PS. First of all this applies to SA characteristics at the laser operating wavelength such as absorption saturation energy density, coefficient of residual absorption in the fully bleached state, bleaching rise and fall time, and optical destruction threshold. The requirements for their absolute values depend on the spectroscopic properties of the lasing medium (LM) and the laser cavity parameters.In most instances with certain exceptions, SA based on tetrahedrally coordinated (TC) transition-metal ions of the iron group have bleaching relaxation times that are longer than the generation time of the laser pulses obtained using them. Such SA are usually called slowly relaxing. Relaxation processes leading to a restoration of their initial absorption can be ignored in analyzing their operation in a laser. In the simplest instance (if a four-level diagram is used for the spectroscopic model of the SA), the criterion for SA functioning as a PS is written [1-8]:

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“…4), defining a rapid and a slow component, as indication of a biexponential character. Consequently, and to analyse our results, we have used a mean lifetime defined by [8,9] …”

Section: Emission Studymentioning

confidence: 99%

Spectroscopic Properties of Cr3+-Doped Phosphate Glasses

Haouari

Ajroud

Ouada

et al. 1999

phys. stat. sol. (b)

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Emission spectroscopy of Cr3+‐doped phosphate glasses has been studied. Different site distributions of the chromium ions having an environment with nearly octahedral symmetry could be identified on the basis of the luminescence decay characteristics and the time‐resolved emission study. The low quantum yield in luminescence is attributed to an efficient multiphonon relaxation process deexciting rapidly ions submitted to the weaker crystal field.

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Transparent glass-ceramics doped by chromium(III): Spectroscopic properties and characterization of crystalline phases

Cited by 37 publications

References 19 publications

EPR, optical absorption and luminescence studies of Cr3+-doped antimony phosphate glasses

EPR, optical absorption and luminescence studies of Cr3+-doped antimony phosphate glasses

Saturable absorbers based on tetrahedrally coordinated transition-metal ions in crystals (Review)

Spectroscopic Properties of Cr3+-Doped Phosphate Glasses

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