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159 results on '"Wu, Wuming"'

8. A Novel MZI Fiber Sensor with Enhanced Curvature and Strain Sensitivity Based on Four-Core Fiber.

Author

Zhu, Xiaojun, Chen, Feijie, Zhuang, Haoran, Qian, Jiayi, Liu, Hai, Cao, Juan, Shi, Yuechun, Wang, Xia, and Wu, Wuming

Subjects
OPTICAL fibers, CURVATURE, DETECTORS
Abstract

We present a high-sensitivity curvature and strain Mach–Zehnder interferometer (MZI) fiber sensor based on a configuration of no-core fiber (NCF) and four-core fiber (FCF). We used an optical fiber fusion splicer to directly splice a segment of FCF between two segments of NCF, with both the FCF and NCF made of SiO2, where the FCF exhibits multi-path interference characteristics that allow for higher sensitivity. The NCF, with its self-focusing property, excites higher-order modes, which split and transmit it into the four cores of the FCF. The experimental results show that within a curvature range of 0.0104 m−1–0.1515 m−1, the maximum sensitivity can reach −78.04 dB/m−1 with a high linear value of ~0.99. Additionally, the strain response is also experimentally studied. In the range of 0–600 με, the maximum strain sensitivity is −6.49 pm/με. The sensor demonstrates high curvature and strain sensitivity, indicating its potential applications in sensing measurements. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Beam shaping for uplink transmission of a relay mirror system

Author

Wu, Huiyun, Zhao, Haichuan, Xu, Xiaojun, Wu, Wuming, Chen, Jinbao, and Zhao, Yijun

Subjects
Algorithms -- Methods, Algorithms -- Usage, Optics -- Research, Optics -- Methods, Algorithm, Astronomy, Physics
Abstract

We establish the model of a two-Cassegrain-telescope system that is commonly used in a relay mirror system. With this model, uplink transmission of the relay mirror system is theoretically analyzed. We determined that uplink transmission with turbulence completely corrected is not an optimal mode. We improve power coupling efficiency of the two-Cassegrain-telescope system by optimizing the optical phase at the launching telescope by use of the stochastic parallel gradient descent algorithm. For a 10km vertical uplink transmission, power coupling efficiencies of the system are 63.10%, 87.82%, and 97.80% corresponding to an open-loop mode, a closed-loop mode, and a closed-loop with optimization mode, respectively. For a 30 km vertical uplink transmission, power coupling efficiencies of the system are 22.35%, 82.66%, and 91.91%, corresponding to an open-loop mode, a closed-loop mode, and a closed-loop with optimization mode, respectively. The results show that power coupling efficiency of the two-Cassegrain-telescope system is significantly improved. [c] 2010 Optical Society of America OCIS codes: 010.1300, 010.3310, 140.3300.

Published
2010

42. Analysis of atmosphere turbulence optical parameters

Author

吴慧云 Wu Huiyun, 习锋杰 Xi Fengjie, 吴毅 Wu Yi, 吴武明 Wu Wuming, 许晓军 Xu Xiaojun, and 舒柏宏 Shu Baihong

Subjects
Turbulent atmosphere, Environmental science, Electrical and Electronic Engineering, Atmospheric sciences, Atomic and Molecular Physics, and Optics
Published
2012
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43. Suppression of Stimulated Brillouin Scattering in Single-Frequency Raman Fiber Amplifiers

Author

许晓军 Xu Xiaojun, 冷进勇 Leng Jinyong, 赵伊君 Zhao Yijun, 吴武明 Wu Wuming, and 陈胜平 Chen Shengping

Subjects
symbols.namesake, Materials science, business.industry, Brillouin scattering, Fiber amplifier, symbols, Optoelectronics, Electrical and Electronic Engineering, business, Raman spectroscopy, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2010
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44. Simulation of 100 kW Solid-State Laser Relay Mirror System

Author

许晓军 Xu Xiaojun, 吴慧云 Wu Huiyun, 吴武明 Wu Wuming, and 陈金宝 Chen Jinbao

Subjects
Physics, Optics, business.industry, Solid-state laser, Relay, law, Electrical and Electronic Engineering, business, Atomic and Molecular Physics, and Optics, Mirror neuron, Electronic, Optical and Magnetic Materials, law.invention
Published
2009
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