Characterization of thermo-optical and mechanical properties of calcium aluminosilicate glasses

Steimacher, A.; Astrath, N. G. C.; Novatski, Andressa; Pedrochi, F.; Bento, A. C.; Baesso, Mauro Luciano; Medina, A. N.

doi:10.1016/j.jnoncrysol.2006.03.091

Cited by 51 publications

(43 citation statements)

References 23 publications

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“…Moreover, as an athermal glass, Q98 presents negative ∂n∕∂T that cancels the . These values are within the expected values for these materials [14,15]. Figure 4 shows the amplitude (steady-state signal) of the TL signals normalized by the product P e l 0 as a function of l 0 for BK7 samples with thicknesses varying from 1.1 to 30 mm.…”

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confidence: 75%

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Discriminating the role of sample length in thermal lensing of solids

et al. 2014

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Thermal lens (TL) is a key effect in laser engineering and photothermal spectroscopy. The amplitude of the TL signal or its dioptric power is proportional to the optical path difference (OPD) between the center and border of the beam, which is proportional to the heat power (Ph). Due to thermally induced mechanical stress and bulging of end faces of the sample, OPD depends critically on the geometry of the sample. In this investigation, TL measurements were performed as a function of the sample length keeping the same Ph. It is experimentally demonstrated that for materials with positive ∂n∕∂T OPD increases typically 30 to 50% with the decrease of sample length (from long rod to thin-disk geometry). For materials with negative ∂n∕∂T, this variation is much larger due to the cancelation of the different contributions to OPD with opposite signs. Furthermore, the experimental investigation presented here validates a recently proposed unified theoretical description of the TL effect.

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supporting

confidence: 75%

“…These materials were selected for their thermo-optical properties (Table 1). CAS is typical oxide glass with positive ∂n∕∂T and positive linear thermal expansion coefficient [14,15]. Q98 is a Nd 3 doped phosphate glass with negative ∂n∕∂T, which was designed to be an athermal optical material.…”

mentioning

confidence: 99%

Discriminating the role of sample length in thermal lensing of solids

et al. 2014

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“…This glass exhibits phonon energy of approximately 800 cm −1 , lower than those of silicate glasses [14]. When co-doped with Er 3+ /Yb 3+ , it presents high emission rates in the mid infrared, near 2.8 m [15].…”

Section: Introductionmentioning

confidence: 91%

“…The glass melting under vacuum conditions around 1600 • C using different Al 2 O 3 , CaO and SiO 2 contents has been described elsewhere [14]. Fig.…”

Section: Similarity Of Lscas Glass Structure With a Disordered Garnetmentioning

confidence: 99%

“…This procedure has been used in many works as a routine tool to characterize garnet structures. For glass materials, Raman spectroscopy is also an important tool that yields information on the number of bridging oxygen's per cation tetrahedron in the glass and on the non-bridging oxygen (NBO) content [14]. Fig.…”

Section: Similarity Of Lscas Glass Structure With a Disordered Garnetmentioning

confidence: 99%

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