Diode-pumped Yb:GGG laser: comparison with Yb:YAG

Chénais, Sébastien; Druon, Frédéric; Balembois, François; Georges, Patrick; Brenier, A.; Boulon, G.

doi:10.1016/s0925-3467(02)00353-1

Cited by 132 publications

(76 citation statements)

References 15 publications

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“…Actually, as the two levels 2 F 5/2 and 2 F 7/2 are split in manifolds by the Stark effect due to the electric crystalline field of the host matrix, the ion environment strongly models the spectrum. In a simple way, the spectral broadening can be directly related to the level of disorder of the matrix [37][38][39][40][41][42][43][44][45][46][47][48]. On the first hand, if the matrix is relatively simple and well-ordered, the spectra would reveal relatively narrow and intense lines (which are a strong disadvantage for short pulse generation).…”

Section: I2 Strategy On the Matrix Hostmentioning

confidence: 99%

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On thermal effects in solid-state lasers: The case of ytterbium-doped materials

Chénais

Druon²,

Forget³

et al. 2006

Progress in Quantum Electronics

328

271

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A review of theoretical and experimental studies of thermal effects in solid-state lasers is presented, with a special focus on diode-pumped ytterbium-doped materials. A large part of this review provides however general information applicable to any kind of solid-state laser. Our aim here is not to make a list of the techniques that have been used to minimize thermal effects, but instead to give an overview of the theoretical aspects underneath, and give a state-of-the-art of the tools at the disposal of the laser scientist to measure thermal effects. After a presentation of some general properties of Yb-doped materials, we address the issue of evaluating the temperature map in Yb-doped laser crystals, both theoretically and experimentally. This is the first step before studying the complex problem of thermal lensing (part III). We will focus on some newly discussed aspects, like the definition of the thermo-optic coefficient: we will highlight some misleading interpretations of thermal lensing experiments due to the use of the dn/dT parameter in a context where it is not relevant. Part IV will be devoted to a state-of-the-art of experimental techniques used to measure thermal lensing. Eventually, in part V, we will give some concrete examples in Yb-doped materials, where their peculiarities will be pointed out.

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Section: I2 Strategy On the Matrix Hostmentioning

confidence: 99%

“…In this case, only the elasto-optical coefficients p 11 , p 12 , p 44 are nonzero. These coefficients are given in the [100] system linked to the crystal.…”

Section: Vii1 Basic Equationsmentioning

confidence: 99%

On thermal effects in solid-state lasers: The case of ytterbium-doped materials

Chénais

Druon²,

Forget³

et al. 2006

Progress in Quantum Electronics

328

271

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“…The Pr:GGG and Yb:GGG targets were cut from single crystals grown by the Czochralski method [9] with mean Pr and Yb concentration 1 at.% and 5 at.%, respectively. An excimer KrF laser was focused on the rotating target on a rectangular spot of 2.5x4 mm 2 area.…”

Section: Methodsmentioning

confidence: 99%

Rare Earth Doped Gallium Gadolinium Orthogallate Films Prepared by Pulsed Laser Deposition

Lančok

Novotný

Garapon

et al. 2007

J. Phys.: Conf. Ser.

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Abstract. The decomposition of Gd 3 Ga 5 O 12 single crystal target induced by a KrF excimer laser pulse during the deposition process was observed. This phenomenon was studied ex situ by EDX analyse of ablated target and in situ by Optical Emission Spectroscopy of the laser plasma. The decomposition process depends mainly on the absorption coefficient of the target on the corresponding laser wavelength and oxygen partial pressure in the deposition chamber during laser ablation. Taking into account the differences between absorption coefficients of Pr:Gd 3 Ga 5 O 12 and Yb:Gd 3 Ga 5 O 12 targets the Pr:GdGaO 3 and Yb:GdGaO 3 thin films were successfully fabricated at different oxygen pressures of 1 Pa and 2.5 Pa, respectively. The structural properties of the fabricated films were studied by RBS and XRD.

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“…Up to now YAG and GGG series of crystals have received great attention due to their large size and reasonable thermal behavior. For example, Nd:YAG, Yb:YAG, Nd:GGG, and Yb:GGG crystals have been obtained by the Czochralski method [8] [9]. It has been previously reported that thermal conductivity (κ) observed for undoped YAG is 10.3 and for undoped GGG it is 8 W/m•K at 300 K [10] and the value of κ decreases depending upon the nature and quantity of dopants [9] [11].…”

Section: Introductionmentioning

confidence: 99%

Structural and Thermal Properties of Tb, Ce Doped Y2.97Gd0.03Al2Ga3O12 Single Crystals

Faheem¹,

Lynn²

2014

AJAC

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The structural and thermal properties of yttrium-aluminum-gadolinium-gallium (Y 2.97 Gd 0.03 Al 2 Ga 3 O 12 ) single crystals doped with terbium (0.1%), cerium (0.01%) and co-doped with both terbium and cerium ((0.1, 0.01)%) were investigated. All samples were heated (calcined) at 1400˚C for 15 hours before crystallization. X-ray powder diffraction (XRD) patterns of all calcined samples showed the presence of yttrium gallium aluminate (Y 3 Al 2 Ga 3 O 12 ) and gadolinium gallium oxide (Gd 3 GaO 6 ) while the grown crystals were single phase of Y 3 Al 2 Ga 3 O 12 . The lattice parameter of the crystals decreased with Ce doping. The thermal conductivity of each sample was determined from 25˚C to 300˚C and found to decrease exponentially with increasing temperature. All doped crystals have different thermal conductivity, which is attributed to the crucial influence of crystals structures. 0.01% Ce:YAGG was found to be a strong candidate for scintillators and other lasing materials because of its good thermal behavior (10.71 W/m•K).

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Diode-pumped Yb:GGG laser: comparison with Yb:YAG

Cited by 132 publications

References 15 publications

On thermal effects in solid-state lasers: The case of ytterbium-doped materials

On thermal effects in solid-state lasers: The case of ytterbium-doped materials

Rare Earth Doped Gallium Gadolinium Orthogallate Films Prepared by Pulsed Laser Deposition

Structural and Thermal Properties of Tb, Ce Doped Y<sub>2.97</sub>Gd<sub>0.03</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> Single Crystals

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Diode-pumped Yb:GGG laser: comparison with Yb:YAG

Cited by 132 publications

References 15 publications

On thermal effects in solid-state lasers: The case of ytterbium-doped materials

On thermal effects in solid-state lasers: The case of ytterbium-doped materials

Rare Earth Doped Gallium Gadolinium Orthogallate Films Prepared by Pulsed Laser Deposition

Structural and Thermal Properties of Tb, Ce Doped Y&lt;sub&gt;2.97&lt;/sub&gt;Gd&lt;sub&gt;0.03&lt;/sub&gt;Al&lt;sub&gt;2&lt;/sub&gt;Ga&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt; Single Crystals

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Structural and Thermal Properties of Tb, Ce Doped Y<sub>2.97</sub>Gd<sub>0.03</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> Single Crystals