서지주요정보
표면 플라즈몬 광섬유 편광기와 열확장코어 광섬유의 제작 및 특성조사 = Fabrication and characterization of surface plasmon fiber-optic polarizers and thermally expanded core fibers
서명 / 저자 표면 플라즈몬 광섬유 편광기와 열확장코어 광섬유의 제작 및 특성조사 = Fabrication and characterization of surface plasmon fiber-optic polarizers and thermally expanded core fibers / 김진하.
저자명 김진하 ; Kim, Jin-Ha
발행사항 [대전 : 한국과학기술원, 1994].
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등록번호

8004353

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 94009

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초록정보

This thesis consists of two parts. One is concerned with all fiber-optic polarizers utilizing surface plasmon resonance and the other deals with TEC (thermally expanded core) fibers. Surface plasmon is an electromagnetic surface wave propagating along the boundary between two dielectric media, one of which has negative real dielectric constant. In the geometry of a thin metal film coated on the polished side of a fiber, the surface plasmon supported by the film can be excited by the evanescent field of light propagating along the fiber. Since the surface plasmon has TM-polarization characteristics, only TM-polarized light can be coupled to the surface plasmon and lose its optical energy performing as a polarizer. For experimental demonstrations, Al thin films with various thicknesses were coated by sputtering method onto the 633 nm, 830 nm, and 1.3 $\mu$m single mode fibers. For a given film thickness, the extinction ratio was a senstive function of the overlay oil index as expected. The maximum extinction ratios were higher than 30 dB for almost all samples and the best result was 42 dB at $90\mbox{\AA}$ film thickness, with the 1.3 $\mu$m single mode fiber. The insertion losses measured by the cut-back method ranged from 0.2 dB to 1.5 dB. The use of the TEC fibers in hybrid fiber-optic components has an advantage of eliminating lenses for collimation and focusing. In between the two ends of the TEC fibers, thin micro-optic devices such as a modulator, an isolator as well as a polarizer whose thicknesses are less than a few hundred microns can be inserted without serious loss due to diffraction. An electric furnace was fabricated to heat the fibers locally up to $1300\,^\circ\!C$. Many difficulties arose in heating the fibers at such a high temperature where they react chemically with the surrounding contaminants. The fibers became brittle and often stuck to the surrounding wall. Nevertheless 1.3 $\mu$m single mode TEC fiber was obtained by maintaining it at $1250\,^\circ\!C$ for 10 hours. The MDF(mode field diameter) of the fiber was measured to be enlarged by 27\%. By improving the heat treatment techniques, the MDF's of the fibers could be enlarged up to 2 or 3 times the original sizes.

서지기타정보

서지기타정보
청구기호 {MPH 94009
형태사항 iv, 73 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jin-Ha Kim
지도교수의 한글표기 : 김병윤
지도교수의 영문표기 : Byoung-Yoon Kim
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 69-73
주제 Plasmons (Physics)
Polarizers (Light)
광학 섬유. --과학기술용어시소러스
플라스몬. --과학기술용어시소러스
편광기. --과학기술용어시소러스
Optical fibers.
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