• 제목/요약/키워드: diode laser

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

  • 김동철;심종인;어영선;박문규;강중구;계용찬;장동훈
    • 한국광학회:학술대회논문집
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    • 한국광학회 2003년도 제14회 정기총회 및 03년 동계학술발표회
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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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열경화성 3D 프린트 몰드와 생분해성 소재 접합에 관한 연구 (A Study on Joining of 3D Thermoset and Biodegradable Polymers)

  • 윤성철;마재권;방대욱;최해운
    • Journal of Welding and Joining
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    • 제32권4호
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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