Determination of the thermo-optic coefficient dn/dT of ytterbium doped ceramics (Sc2O3, Y2O3, Lu2O3, YAG), crystals (YAG, CaF2) and neodymium doped phosphate glass at cryogenic temperature

Cardinali, V.; Marmois, Emilie; Garrec, B. Le; Bourdet, Gilbert L.

doi:10.1016/j.optmat.2011.05.035

Cited by 36 publications

(25 citation statements)

References 17 publications

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“…Figure 26 shows thermal expansion data for the isotropic laser material CaF 2 , for undoped and 10 at. % Yb doped crystals [59], while in Figure 27 we include some thermal expansion data for some other common laser and optical materials, uniaxial Al 2 O 3 , isotropic MgO, and uniaxial ZnO [60]. expansion coefficients as a function of absolute temperature for the undoped isotropic sesquioxide laser materials Sc2O3 [30] and Y2O3 [59], and the Yb-doped laser materials Yb:Y2O3 [59], Yb:Sc2O3 [59], and Yb:Lu2O3 [59] are shown in Figure 25.…”

Section: Reported Thermal Expansion Coefficient Measurementsmentioning

confidence: 99%

“…% Yb-doped material Yb:Sc2O3 (pink) [59], and 1 at. % Yb-doped material Yb:Lu2O3 (black) [59]. Thermal expansion coefficient as a function of absolute temperature for the uniaxial laser materials YVO 4 [30] along the a (pink) and c (green) axes, and GdVO 4 along the a (red) and c (blue) axes [3].…”

Section: Figure 24mentioning

confidence: 99%

“…Thermal expansion coefficient as a function of absolute temperature for the undoped isotropic sesquioxide laser materials Sc2O3 (blue) [30] and Y2O3 (red) [59], and the 10 at. % Yb-doped laser material Yb:Y2O3 (green) [59], the 1 at. % Yb-doped material Yb:Sc2O3 (pink) [59], and 1 at.…”

Section: Figure 24mentioning

confidence: 99%

“…% Yb-doped laser material Yb:Y 2 O 3 (green) [59], the 1 at. % Yb-doped material Yb:Sc 2 O 3 (pink) [59], and 1 at. % Yb-doped material Yb:Lu 2 O 3 (black) [59].…”

Section: Figure 24mentioning

confidence: 99%

“…% Yb-doped material Yb:Sc 2 O 3 (pink) [59], and 1 at. % Yb-doped material Yb:Lu 2 O 3 (black) [59]. .…”

Section: Figure 24mentioning

confidence: 99%

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The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

Brown¹,

Tornegård²,

Kolis

et al. 2016

Applied Sciences

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Ultrafast laser physics continues to advance at a rapid pace, driven primarily by the development of more powerful and sophisticated diode-pumping sources, the development of new laser materials, and new laser and amplification approaches such as optical parametric chirped-pulse amplification. The rapid development of high average power cryogenic laser sources seems likely to play a crucial role in realizing the long-sought goal of powerful ultrafast sources that offer concomitant high peak and average powers. In this paper, we review the optical, thermal, thermo-optic and laser parameters important to cryogenic laser technology, recently achieved laser and laser materials progress, the progression of cryogenic laser technology, discuss the importance of cryogenic laser technology in ultrafast laser science, and what advances are likely to be achieved in the near-future.

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Section: Reported Thermal Expansion Coefficient Measurementsmentioning

confidence: 99%

Section: Figure 24mentioning

confidence: 99%

Section: Figure 24mentioning

confidence: 99%

“…% Yb-doped laser material Yb:Y 2 O 3 (green) [59], the 1 at. % Yb-doped material Yb:Sc 2 O 3 (pink) [59], and 1 at. % Yb-doped material Yb:Lu 2 O 3 (black) [59].…”

Section: Figure 24mentioning

confidence: 99%

“…% Yb-doped material Yb:Sc 2 O 3 (pink) [59], and 1 at. % Yb-doped material Yb:Lu 2 O 3 (black) [59]. .…”

Section: Figure 24mentioning

confidence: 99%

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The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

Brown¹,

Tornegård²,

Kolis

et al. 2016

Applied Sciences

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Thermo-optic properties of Yb:Lu2O3 single crystals

et al. 2015

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Lu 2 O 3 ). Initial growth attempts of sesquioxides utilized the Verneuil method [2,3] or the floating zone technique [4]. The resulting mm-size crystals of low quality were utilized for the initial determination of the optical and thermomechanical properties of these materials and even allowed for first flash-lamp-pumped laser experiments [5]. Afterward, different growth methods such as the laser-heated pedestal growth (LHPG) [6], the micro-pulling down technique [7] and the Czochralski technique [8] were applied, but still the crystals were limited in size and quality. It was not before 2008 that by the optimization of the heat exchanger method [9] the growth of cm-scale single-crystalline sesquioxides with excellent optical quality became possible [10]. In the following years, in particular cubic sesquioxide host material lutetia (Lu 2 O 3 ) has been shown to be an excellent host material for various rare earth ions [11]. Efficient and high-power laser operation has been demonstrated utilizing various laser ions such as Yb 3+ [12,13] at 1 µm, Tm 3+ [14] and Ho 3+ [15] at 2 µm as well as Er 3+ at 3 µm [16].These outstanding laser results obtained in the past motivate a reexamination of the thermo-optic properties of Lu 2 O 3 that affect the parameters of the thermal lens. The lens-like behavior is related with three main effects, namely temperature dependence of the refractive index (expressed by the thermo-optic coefficient, dn/dT), end-bulging related to the thermal expansion coefficient α, as well as photoelastic effect that is responsible for the lens astigmatism and birefringence losses. Under the plane stress approximation (that refers to the diode pumping case), first two terms are dominant [17]. Thus, the knowledge of dn/dT and α values as well as their combination, called thermal coefficient of the optical path (TCOP) [18], is crucial for the determination of the thermal lens parameters and, hence, the cavity design. Indeed, non-compensated thermal lens can lead to Abstract A detailed study of thermo-optic properties of 1.5 at.% Yb:Lu 2 O 3 single crystal is performed. Thermooptic dispersion formulas are derived for dn/dT coefficient and thermal coefficient of the optical path. At the wavelength of 1.03 μm, dn/dT = 5.8 × 10 −6 K −1 . High-precision temperature-dependent measurements of the thermal expansion coefficient α are performed. At the room temperature (RT), α = 5.880 ± 0.014 × 10 −6 K −1 . Temperature dependence of the bandgap is analyzed, yielding RT value of E g = 5.15 eV and dE g /dT = -3.7 × 10 −4 eV/K. Sensitivity factor of the thermal lens is calculated for a diodepumped Yb:Lu 2 O 3 crystal versus the pump spot radius and crystal temperature.

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Thermal and spectroscopic characterization and evaluation of thermal effects for cryogenic cooled Yb:LuAG

Zhu,

Song,

Zong

et al. 2023

Appl. Phys. B

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Determination of the thermo-optic coefficient dn/dT of ytterbium doped ceramics (Sc2O3, Y2O3, Lu2O3, YAG), crystals (YAG, CaF2) and neodymium doped phosphate glass at cryogenic temperature

Cited by 36 publications

References 17 publications

The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

Thermo-optic properties of Yb:Lu2O3 single crystals

Thermal and spectroscopic characterization and evaluation of thermal effects for cryogenic cooled Yb:LuAG

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