Absorbing coatings for large disk-shaped active elements made from KGSS-0180/35 neodymium phosphate glass for laser amplifiers

Arbuzov, V. I.; Vakhmyanin, K. P.; Volynkin, V. M.; Tsvetkov, A. D.; Charukhchev, A. V.; Shashkin, V. S.

doi:10.1364/jot.69.000013

Cited by 3 publications

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“…It can be seen from this dependence that, at a copper concentration of 1 ppm in the glass, the nonactive absorption coefficient is of the order of 0.0020 cm -1 , which corresponds to an absorptivity of 0.002 cm -1 /ppm. Seemingly, this result is in contradiction with the data obtained in [9]. In [9], the authors designed the composition of the cladding glass (absorbing coating in a laser active element) and obtained the dependence of the absorption coefficient on the copper concentration in the glass over a wide range of concentrations (2000-10000 ppm).…”

Section: Resultsmentioning

confidence: 80%

“…Seemingly, this result is in contradiction with the data obtained in [9]. In [9], the authors designed the composition of the cladding glass (absorbing coating in a laser active element) and obtained the dependence of the absorption coefficient on the copper concentration in the glass over a wide range of concentrations (2000-10000 ppm). In this case, the absorptivity turned out to be equal to 1.05 × 10 -3 cm -1 /ppm.…”

Section: Resultsmentioning

confidence: 80%

“…As was noted above, the contribution of Nd 3+ ions to the nonactive absorption coefficient of the KGSS 0180/35 glass is equal to 0.00017 cm -1 . With due regard for the absorptivities of cobalt, nickel, and vanadium [9,13] and their limiting concentrations in the glass (see table), their maximum contribution to the nonactive absorption coefficient can be as large as 0.000024, 0.00009, and 0.000042 cm -1 , respectively. Their total contribution is approximately equal to 0.00016 cm -1 .…”

Section: Resultsmentioning

confidence: 99%

“…Only insignificant part of copper is in the univalent form Cu 1+ , whose absorption maximum lies in the UV spectral range. The absorption maximum of bivalent copper in the matrix of the KGSS 0180/35 glass is observed at 925 nm [9]. Therefore, the presence of Cu 2+ ions in glasses leads to an increase in the absorption in the range of 1053 nm only due to the long-wavelength wing of the absorption band.…”

Section: Absorption By Transition Elements In the Near-ir Spectral Rangementioning

confidence: 95%

“…However, copper can drastically increase the absorption coefficient of the glass, because the absorption band has a very large width. In particular, according to the data of different authors [1,[9][10][11], the absorptivity of Cu 2+ ions in the range 1000-1100 nm for different phosphate glasses is larger than that of Fe 2+ ions by a factor of approximately 6-8.…”

Section: Absorption By Transition Elements In the Near-ir Spectral Rangementioning

confidence: 99%

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Effect of coloring impurities on the absorption in neodymium phosphate laser glass at a lasing wavelength

et al. 2006

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This paper reports on the results of the investigation of KGSS 0180/35 neodymium phosphate glasses produced on an industrial scale under oxidizing conditions and glasses prepared under experimental conditions in which iron and copper in small amounts rather than neodymium are introduced into the glass composition. The experimental glasses are synthesized by varying the redox conditions of melting. The oxidation states of transition metal impurities (Cu, Fe, V, Ni, Co) and the nonactive absorption coefficients of glasses at the lasing wavelength are determined. It is revealed that the main contribution to the nonactive absorption coefficient of the KGSS 0180/35 glass produced on an industrial scale is made by Cu 2+ ions at a concentration higher than 0.5 ppm. At a lower copper concentrations, the total contribution of Fe 2+ , V 4+ , Ni 2+ , and Co 2+ impurity ions to the nonactive absorption coefficient is comparable to that of Cu 2+ ions. It is demonstrated that a decrease in the concentration of coloring impurities in glasses and the optimization of redox conditions of melting make it possible to prepare phosphate laser glasses with a nonactive absorption coefficient of the order of 0.001 cm -1 . In terms of the nonactive absorption coefficient, these glasses are on a par with similar glasses of foreign manufacture and satisfy the requirements imposed on glasses by developers of high-power high-energy laser facilities.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Absorption By Transition Elements In the Near-ir Spectral Rangementioning

confidence: 95%

Section: Absorption By Transition Elements In the Near-ir Spectral Rangementioning

confidence: 99%

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