• Title/Summary/Keyword: $CO_2$레이저

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Fabrication and improvement of diffraction grating with femtosecond and $CO_2$ laser (레이저를 이용한 회절격자 제작 및 효율 향상 연구)

  • Choi, Hun-Kook;Sohn, Ik-Bu;Noh, Young-Chul;Kim, Jin-Tae
    • Laser Solutions
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    • v.15 no.2
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    • pp.6-10
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    • 2012

  • We fabricated the diffraction grating on the surface of fused silica glass using a femtosecond laser. The grooves of diffraction grating has a lot of micro crack and debris result in reduced diffraction efficiency. So, we polished the diffraction grating with $CO_2$ laser beam. With different scan number of $CO_2$ laser beam, we observed the image of diffraction grating and measured the diffraction efficiency.

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The radio frequency excited slab waveguide CO2 laser (고주파 여기식 슬랩형 도파관 CO2 레이저)

  • 김규식;이영우;우삼용;최종운
    • Korean Journal of Optics and Photonics
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    • v.14 no.4
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    • pp.406-412
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    • 2003

  • We have developed a radio frequency excited slab waveguide $CO_2$ laser. The dimension of active volume is 2${\times}$40${\times}$400 mm. One concave and one convex mirror are used to make the unstable resonator of the positive branch. The radio frequency is 123 MHz and RF input power is varied from 100 to 900 W. The laser gas is set to a pressure of 10∼60 torr and the mixing ratio is $CO_2$:$N_2$:He=1:1:3. The laser output power of 70.7 W was obtained which corresponds to laser power to RF power conversion efficiency of 9.2%.

  • https://doi.org/10.3807/KJOP.2003.14.4.406 인용 PDF KSCI

Treatment of Gingival Irritation Fibroma Using $CO_2$ Laser (이산화탄소 레이저($CO_2$ laser)를 이용한 치은에 발생한 자극성 섬유종의 치료)

  • Choi, Young-Chan;Park, Ju-Hyun;Ahn, Hyung-Joon
    • Journal of Oral Medicine and Pain
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    • v.35 no.2
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    • pp.119-122
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    • 2010

  • Carbondioxide($CO_2$) laser is one of the most widely employed lasers in oral soft tissue surgery because of its excellent affinity for water based soft tissues. It has some inherent advantages such as hemostasis, less postoperative swelling, reduction of bacterial population at surgical site, less need for suturing, less scarring, and less postoperative pain compared to conventional surgical therapies including the use of scalpel, diathermy, cryotherapy and electrosurgery. A 30-years-old male was presented with gingival swelling. Clinical examination revealed a well?defined pedunculated fibrotic mass on the buccal gingiva near right maxillary 1st molar. In radiographic examination, no remarkable abnormality was seen. Excisional biopsy was performed with $CO_2$ laser (continuous wave mode, 4.0W). Histological diagnosis was "Irritation fibroma". $CO_2$ laser has advantages those are suitable for surgical treatment of intraoral lesion. If appropriate training and experience are provided, the dentist would be able to manage intraoral lesions more efficiently and successfully with the use of the $CO_2$ laser.

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