서지주요정보
이중모드 광섬유를 이용한 간섭계형 센서에 관한 연구 = Interferometric sensors using two mode optical fibers
서명 / 저자 이중모드 광섬유를 이용한 간섭계형 센서에 관한 연구 = Interferometric sensors using two mode optical fibers / 김봉규.
저자명 김봉규 ; Kim, Bong-Kyu
발행사항 [대전 : 한국과학기술원, 1992].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8002560

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 92004

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

A two mode-fiber interferometer which makes use of two lowest order spatial modes was investigated for sensor application. The use of two-mode fibers allows the development of several very usefull sensors that are difficult to realize using conventional single-mode fibers optic technology. First, we examined the polarization and modal characteristics of a two-mode fiber with an elliptical core. Propagation constants of the two spatial modes in the fiber was measured by prism output coupling technique. We obtained the modal beat-length($L_B$) of 160 ㎛. The two-mode fiber we used had a cutoff frequency close to but grater than 632.8 nm. Next we made a modal interferometer with the two-mode fiber and measured differential phase shift between the two-modes induced by strain and temperature change. We investigated two different kinds of interference signals which are interference between the two spatial modes and between two polarization modes. Experimental results showed that the two spatial modes experienced 2χ differential phase shift for the elongation of 770 ㎛ and 1500 ~ 3500 ㎛ for the two polarization states, and the two polarization modes ($LP_01$) have beatlength of 65 ㎛. Differential phase shift per unit length between the two modes induced by temperature change were 1.674 rad/m℃ and 1.848 rad/m℃ for the two polarization states, and 5.15 rad/m℃ between the two polarization modes ($LP_01$).

서지기타정보

서지기타정보
청구기호 {MAP 92004
형태사항 50 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Bong-Kyu Kim
지도교수의 한글표기 : 김병윤
지도교수의 영문표기 : Byoung-Yoon Kim
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 48-50
주제 Interferometers.
Electromagnetic waves --Polarization.
광섬유 센서. --과학기술용어시소러스
간섭계. --과학기술용어시소러스
멀티모드 파이버. --과학기술용어시소러스
Optical fiber detectors.
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