Thermal effects in solid-state laser materials

Weber, Rudolf; Neuenschwander, Beat; Weber, H.P.

doi:10.1016/s0925-3467(98)00047-0

Cited by 87 publications

(32 citation statements)

References 8 publications

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“…The linear increase of dS / dT with the temperature was observed at all investigated wavelengths. This observation is, for instance, very important for the development of laser devices, in which the active medium can reach temperatures of the order of 150°C, 21,22 thus causing an increase of dS / dT, and, ultimately, degradation of the beam quality. It should also be noted that the slope exhibits a strong dependence on the photon energy.…”

Section: Resultsmentioning

confidence: 99%

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Silva

Sakai

Steimacher

et al. 2007

Journal of Applied Physics

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The refractive index and the temperature coefficient of the optical path length change of tellurite ͑80TeO 2 : 20Li 2 O͒ and chalcogenide glasses ͑72.5Ga 2 S 3 : 27.5La 2 O 3 ͒ were determined as a function of temperature ͑up to 150°C͒ and wavelength ͑in the range between 454 and 632.8 nm͒. The tellurite glass exhibits the usual refractive index dispersion in the wavelength range analyzed, while anomalous refractive index dispersion was observed for the chalcogenide glass between 454 and 530 nm. The dispersion parameters were determined by means of the single-effective oscillator model. In addition, a strong dependence of the temperature coefficient of the optical path length on the photon energy and temperature was found for the chalcogenide glass. The latter was correlated to the shift of the optical band gap ͑or electronic edge͒ with temperature, which was interpreted by the electron-phonon interaction model.

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Section: Resultsmentioning

confidence: 99%

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Silva

Sakai

Steimacher

et al. 2007

Journal of Applied Physics

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“…4 and 5 dS/dT increases with the temperature for all studied samples. This fact is very important for the development of optical systems, such as solid state laser, where the local active medium temperature can reach temperature of the order of 150°C [17,18], increasing therefore the magnitude of dS/dT, and consequently resulting in a large distortion of the laser beam.…”

Section: Discussionmentioning

confidence: 99%

The temperature coefficient of the optical path length as a function of the temperature in different optical glasses

Steimacher

Medina

Bento

et al. 2004

Journal of Non-Crystalline Solids

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“…Because the convection heat transfer coefficient with air is much smaller than with heat sink [27], we can suppose that the crystals are approximately adiabatic with air at the end faces and have convection heat transfer coefficient H with heat sink at side faces. The boundary conditions are…”

Section: Thermal Analysismentioning

confidence: 99%

Four-Dimensional Thermal Analysis of 888 nm Pumped Nd:YVO4 Dual-Rod Acousto-Optic Q-Switched Laser

et al. 2017

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Abstract:A theoretical analysis upon the four-dimensional (4D) spatio-temporal temperature dependent dynamics of 888 nm pumped Nd:YVO 4 dual-rod laser is established, which is valid in both continuous-wave (CW) and acousto-optic (AO) Q-switched pulse lasers conditions. Our model can accurately solve the 4D thermal generation and temperature evolution not only in the steady Q-switched state, but also in the first few unstable giant or dwarf pulses region. Factors including ground state depletion (GSD), energy transfer upconversion (ETU), fluorescence branching ratios, temperature-dependent cross sections and nonradiative relaxations processes are comprehensively considered for precisely estimating thermal effects, valid in both the steady pulse region and the unstable region at the beginning. Moreover, temporal and spatial temperature profiles and their coupling effect on output properties at different repetition-rates are discussed. Experiments of high-power high-repetition-rate 888 nm end-pumped Nd:YVO 4 dual-rod CW and AO Q-switched lasers are also firstly presented and the experimental results enjoy good consistency with our theory.

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Thermal effects in solid-state laser materials

Cited by 87 publications

References 8 publications

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

The temperature coefficient of the optical path length as a function of the temperature in different optical glasses

Four-Dimensional Thermal Analysis of 888 nm Pumped Nd:YVO4 Dual-Rod Acousto-Optic Q-Switched Laser

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