40J class laser oscillation of Nd-doped silica glass with high thermal shock parameter

2007 ◽  
Vol 90 (22) ◽  
pp. 221108 ◽  
Author(s):  
Takahiro Sato ◽  
Yasushi Fujimoto ◽  
Hajime Okada ◽  
Hidetsugu Yoshida ◽  
Masahiro Nakatsuka ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Silica Glass ◽  
Laser Oscillation ◽  
Shock Parameter

Laser Oscillation of Nd-Doped Silica Glass with High Thermal Shock Parameter

2006 ◽  
Vol 45 (9A) ◽  
pp. 6936-6939 ◽  
Author(s):  
Takahiro Sato ◽  
Yasushi Fujimoto ◽  
Tetsuji Ueda ◽  
Akira Fujinoki ◽  
Hajime Okada ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Silica Glass ◽  
Laser Oscillation ◽  
Shock Parameter

scholarly journals Experimental Investigations on Wavefront Distortion of LD-Pumped Neodymium-Doped Silica-Glass Rod with High Thermal Shock Parameter

2020 ◽  
Vol 10 (15) ◽  
pp. 5023
Author(s):  
Long Pan ◽  
Wenfa Huang ◽  
Shikai Wang ◽  
Shengzhe Ji ◽  
Xinghua Lu ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Silica Glass ◽  
High Energy ◽  
Experimental Investigations ◽  
Small Signal ◽  
High Repetition ◽  
Wavefront Distortion ◽  
Shock Parameter ◽  
Material Uniformity

The characterization of a laser diode (LD)-pumped neodymium-doped silica glass (NDSG) laser is here described. The gain performance and wavefront distortion were measured, and the thermal toughness and uniformity distribution of the material were experimentally observed. At a pumping frequency of 1 Hz and energy 7.79 J, a small-signal gain of 1.16 was measured, and the wavefront distortion reached 2.67 λ (wavelength λ = 1053 nm). At a pumping frequency of 25 Hz with 194 W power, the NDSG was still not cracked, which is consistent with its high thermal shock parameter. However, the material uniformity was relatively poor. These results indicate good prospects for the application of NDSG lasers at high energy and high repetition frequency, but the gain performance, uniformity, and other aspects affected by the manufacturing process need to be improved.

Development of Nd-doped Optical Gain Material Based on Silica Glass with High Thermal Shock Parameter for High-Average-Power Laser

2005 ◽  
Vol 44 (4A) ◽  
pp. 1764-1770 ◽  
Author(s):  
Yasushi Fujimoto ◽  
Hidetsugu Yoshida ◽  
Masahiro Nakatsuka ◽  
Tetsuji Ueda ◽  
Akira Fujinoki
Keyword(s):  
Thermal Shock ◽  
Silica Glass ◽  
Average Power ◽  
Optical Gain ◽  
High Average Power ◽  
Power Laser ◽  
Shock Parameter ◽  
Gain Material

Thermal Shock Resistance of the RE-Oxide and Oxynitride Glasses

2005 ◽  
Vol 290 ◽  
pp. 296-299
Author(s):  
František Lofaj ◽  
Františka Dorčáková
Keyword(s):  
Thermal Shock ◽  
Material Properties ◽  
Thermal Shock Resistance ◽  
Glass Composition ◽  
Content Increase ◽  
Common Trend ◽  
Shock Parameter ◽  
Shock Resistance ◽  
Initial Cracks ◽  
Quench Method

Thermal shock resistance of the RE-Si-Mg-O-N glasses (RE = La, Nd, Yb, Lu) with 0 and 20 eq.% of nitrogen was investigated by the indentation-quench method based on propagation of Vickers cracks. Crack growth was measured on the same sample for a test series of different quenching temperatures. Thermal shock resistance of the studied materials was determined as a temperature difference resulting in 10 % growth of the initial cracks (∆T10) and by the thermal shock parameter R calculated from the material properties. Although the comparison of ∆T10 and R values as a function of glass composition revealed some differences between these two approaches, also a common trend was observed. Thermal shock resistance increased with the fractional glass compactness resulting from RE type and N content increase.

The Development of Glass Transparencies for Modern Aircraft

1964 ◽  
Vol 36 (12) ◽  
pp. 403-405 ◽  
Author(s):  
A.J. Holland
Keyword(s):  
Physical Properties ◽  
Thermal Shock ◽  
Silica Glass ◽  
High Speed ◽  
Prolonged Exposure ◽  
Soda Lime ◽  
Polyvinyl Butyral ◽  
Optical Performance ◽  
Soda Lime Silica Glass

The construction of windscreen panels for modern aircraft is described and the role of each component in meeting the requirements for pressure strength, bird resistance and optical performance is discussed. The influence of the physical properties of the windscreen components on the performance of complete laminated windscreens is discussed and the limitations imposed by these properties indicated. Silicone inter‐layers are beginning to replace polyvinyl butyral inter‐layers in high‐speed aircraft laminated transparencies when the temperatures reached are above the working limit of the conventional interlayers. New types of glass capable of withstanding prolonged exposure to higher temperatures than soda lime silica glass without loss of toughening stress, and also capable of withstanding more severe thermal shock without fracture, have been developed.

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