Search Results - Shumin Zhang
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Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers
Published 2020-01-01Get full textWe have experimentally demonstrated tunable multi-wavelength bright-dark and dark-bright pulse pairs in an all normal dispersion Yb-doped fiber laser (YDFL) with a long cavity configuration. By carefully adjusting the pump power and the polarization state, bright-dark pulse pairs could be converted...
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Unified solution of earth pressure at the end of shallow buried shield at different driving angles
Published 2025-06-01Get full textAbstract This study develops a three-dimensional sliding block model for estimating average face pressure in shield tunneling, considering three distinct driving directions based on limit equilibrium theory. The sliding surfaces initiate from the horizontal planes at both tunnel sides. The geometric...
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