• Title/Summary/Keyword: diode laser

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Parasitic Effects due to Current Blocking Structure (전류차단층의 기생효과 해석)

  • 김동철;심종인;어영선;박문규;강중구;계용찬;장동훈
    • Proceedings of the Optical Society of Korea Conference
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    • 2003.02a
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    • pp.148-149
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    • 2003

  • The parasitic effects due to the current blocking layer limit the bandwidth of the semiconductor laser diode. Thus, the parasitic response of various blocking layers was analyzed. The inin type was the best choice for the leakage current reduction and the bandwidth expansion.

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A Study on Joining of 3D Thermoset and Biodegradable Polymers (열경화성 3D 프린트 몰드와 생분해성 소재 접합에 관한 연구)

  • Yoon, Sung Chul;Ma, Jae Kwon;Bang, Dae Wook;Choi, Hae Woon
    • Journal of Welding and Joining
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    • v.32 no.4
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    • pp.20-25
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    • 2014

  • Laser heat source was applied on 3D poly urethane model built by 3D printer and cellulous acetate for joining. A diode laser with 808nm wavelength was transmitted through the 3D model and applied on the boundary of ABS/Acetate and 3D poly urethane model. Based on the experimental result, the ABS and 3D built poly-urethane polymers was successfully joined, but the mechanical strength was not enough at the joining boundaries in the range of 6watt to 8watt of laser heat source. However, biodegradable acetate was successfully joined without damaging the 3D built model and mechanical strength was properly achieved. The optimum laser power was found between 5watt and 8watt with scanning speed of 500mm/min, 700mm/min and 1,000mm/min. Based on the SEM analysis the filling mechanism was that the applied pressure on 3D built model squeezed the fluidic thermoplastics, ABS and acetate, into the structure of 3D model. Therefore soundness of joining was strongly depending on the viscosity of thermoplastics in polymers. The developed laser process is expected to increase productivity and minimize the cost for the final products.

  • https://doi.org/10.5781/JWJ.2014.32.4.20 인용 PDF KSCI