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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 저널정보
- 한국생산제조학회 한국생산제조학회 학술발표대회 논문집 Proceedings of the International Conference of Manufacturing Technology Engineers (ICMTE) 2012
- 발행연도
- 2012.10
- 수록면
- 37 - 41 (5page)
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초록· 키워드
오류제보하기
We demonstrate the laser processing for fabrication of advanced photonic devices including fiber gratings and high transmittance biomimetic windows. The fiber gratings, including fiber Bragg gratings (FBGs) and long period fiber gratings (LPFGs), are fabricated in non-sensitized standard telecom single-mode fiber by femtosecond (fs) laser, making them hightemperature (1000 ℃) stable. The FBG written by fs laser combined with phase mask method is used for monitoring the thermal effect in fs laser interaction with silica glass. The peak temperature of the thermal impulse is estimated about 4800 ℃, which decays to around 500 ℃ in the pulse interval for irradiation of 1.1 mJ at repetition rate of 1 kHz. When the pulse energy and repetition rate increase in the fabrication process of FBGs, the fs-laser-induced grating regions extend from the fiber core to the cladding?air boundary due to the laser self-focusing. With the help of selective chemical etching of the laser modified grating regions, a microhole array structured FBG is formed, which is demonstrated in the application of simultaneous sensing for refractive index (RI) and temperature. For the fs laser direct writing of LPFGs, the period is 100 μm, making the total length of the LPFG only 5 mm. The LPFGs can couple the guided mode to high-order cladding modes of second-order diffraction, resulting in a high RI sensitivity of 5265 nm/RI unit in the RI range of 1.433 ∼ 1.443 and a low-temperature sensitivity of ?15.52 pm/℃ from 20 ℃ to 500 ℃. In addition, the high transmittance biomimetic windows are produced by direct laser
interference ablation. The interfered laser beams are introduced into the surface of a bare optical substrate, where structured surfaces consisting of a micropillar array are produced by the multiple exposure of the two-beam interference ablation. As an example of the application, zinc sulfide substrates are processed with this technology.
interference ablation. The interfered laser beams are introduced into the surface of a bare optical substrate, where structured surfaces consisting of a micropillar array are produced by the multiple exposure of the two-beam interference ablation. As an example of the application, zinc sulfide substrates are processed with this technology.
목차
1. Introduction
2. Fabrication and Sensing Applications of Fs-written Fiber Gratings
3. High Transmittance Biomimetic Windows
4. Conclusions
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2014-552-001136407