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Chen Y.,Laboratory of Nanophotonic Functional Materials and Devices | Zhou G.-Y.,Laboratory of Nanophotonic Functional Materials and Devices | Xia C.-M.,Laboratory of Nanophotonic Functional Materials and Devices | Hou Z.-Y.,Laboratory of Nanophotonic Functional Materials and Devices | And 2 more authors.
Wuli Xuebao/Acta Physica Sinica | Year: 2014

A novel dual-mode large-mode-area micro-structured fiber is proposed. The characteristics of mode field distribution, effective area of fundamental mode, and bending loss based on FEM (finite element method) are analyzed. And the effects of all structured parameters on the confinement loss and effective area are discussed. Results show that this structure makes the first HOM (LP11) and the second mode(EH11) cut off, and it achieves dual-mode transmission in the fiber by adjusting the structural parameters. The effective area of a fundamental mode is approximately 700 μm2. The dual-mode large-mode-area micro-structured fiber can be used in large-capacity fiber transmission. © 2014 Chinese Physical Society. Source


Zhang J.,Laboratory of Nanophotonic Functional Materials and Devices | Guo L.,Laboratory of Nanophotonic Functional Materials and Devices | Guo L.,South China University of Technology | Zhang Q.,Laboratory of Nanophotonic Functional Materials and Devices | Li F.,Laboratory of Nanophotonic Functional Materials and Devices
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2012

Using a resonant two-stage amplified system structure and the laser unit block design methods, high-power pulsed solid-state lasers for industrial are developed. The average output power of 957 W runs continuously for 2 h. The technical parameters such as power instability of 2.5%, photoelectric conversion efficiency of 3%, beam quality of 22 mm·mrad are achieved, and the laser is coupled into the φ0.6 mm fiber. In the amplification stage behind the highest output power is up to 1125 W. Source


Zhang W.,Laboratory of Nanophotonic Functional Materials and Devices | Zhang Q.,Laboratory of Nanophotonic Functional Materials and Devices | Guo L.,Laboratory of Nanophotonic Functional Materials and Devices | Zhang J.,Laboratory of Nanophotonic Functional Materials and Devices
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2012

A 10 W diode pumped solid state (DPSS) laser is employed for through-transmission welding of polycarbonate to study the properties of weld joint. Optical microscope (OM), scanning electron microscope (SEM) and tensile machine are employed for analyzing the morphology of the welded joint, fracture and tensile-shear stress. The results show that under the condition of 8 W laser power, 50 kHz laser frequency, 350 mm/s scanning velocity and 0.1 mm scanning interval, the tensile-shear stresses of the samples are 44 MPa, which research 68% of the basic materials. Layering and pores in the welded joint are the main factors of low mechanical properties and different fracture mechanisms and with this approach we can get weld joint with good mechanical properties. Source

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