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5 results on '"Na Na Wang"'

1. 23.9 W, 985 fs Chirped Pulse Amplification System Based on Yb:YAG Rod Amplifier

Author

Na Na Wang, Xiang Lin Wang, Ting Zhang, Wei Zhang, Xiao Hong Hu, Hao Yuan, Feng Li, Yi Shan Wang, and Wei Zhao

Subjects
Yb:YAG rod, chirped pluse amplification, ultrafast pulse, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467
Abstract

A stable and simple Yb:YAG rod amplifier based on chirped pulse amplification in a water cooling system has been demonstrated. The output power of 38 W at a 250 kHz repetition rate with a spectrum width of 4 nm centered at 1030 nm, which support Fourier-transform limited pulse duration of 389 fs has been generated. The compressed power of 23.9 W with pulse duration of 985 fs has been obtained with a chirped volume Bragg grating compressor. The power stability is measured to be 1.414% when the output power is 35 W. The system is worthwhile to popularize for its good performance and inexpensive cost.

Published
2019
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4. Research on the “Naturalness” Deprivation of Waterfront Landscapes in Urban Basins and Its Measures

Author

Hui Men, Na-Na Wang, and Zhou Jiang

Subjects
Sustainable development, Naturalness, Geography, Construction industry, Plan (drawing), Urban landscape, Environmental planning
Abstract

At the angle of the ldquonaturalnessrdquo deprivation of urban waterfront landscapes in urban basins, and based on the material of the earth in waterfronts in urban basins, shape of the bank, the choose of plants in the bank and the choose of the hydrophilic elements, this paper analyzed and researched the current destruction of the ldquonaturalnessrdquo because of constructed areas of the waterfront landscapes, proposed four suggestions: insisted sustainable development, strengthened the plan, conjectured and evaluated the construction, improved the legislative system and reinforce the supervise, to provide the extended practice theoretic basis.

Published
2008
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