서지주요정보
공간모드 결합을 이용한 광섬유 필터에 관한 연구 = Fiber-optic devices based on spatial-mode coupling
서명 / 저자 공간모드 결합을 이용한 광섬유 필터에 관한 연구 = Fiber-optic devices based on spatial-mode coupling / 황인각.
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8010384

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 99027

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

This dissertation describes various optical fiber filters based on spatial-mode coupling by periodic microbends. The filters are classified to three categories, which are long-period gratings, acousto-optic devices, and a nonreciprocal comb filter, having novel functions or better performances compared to the conventional devices. The principle, fabrication, and optical characteristics of the devices are described, and the discussion for further researches is also added. A new type of long-period fiber grating was demonstrated based on arc-induced periodic microbends. The fabrication method is simple and does not require special fibers. It provides the great flexibility in controlling the filter parameters of wavelength, rejection efficiency, bandwidth, and filter profile, which is difficult to obtain with conventional long-period gratings. The Gaussian and rectangular filter profiles were produced using simple apodization technique. The grating showed high stability against high temperature above 800℃. In all-fiber acousto-optic devices, the periodic microbends are produced by flexural acoustic wave. The various utilization of the acousto-optic device was proposed such as tunable filters, frequency shifters, and optical modulators. A new nonreciprocal device was demonstrated, where the nonreciprocity was induced by optical frequency shift, other than Faraday effect. It was composed of a two-mode fiber interferometer with acousto-optic frequency shifters. The transmission spectra for two opposite optical propagation directions are both periodic functions of optical wavelength, but different in transmission peak wavelengths. The spacing of the wavelength comb was controlled by using mode converters and the comb position was tuned or modulated by electrical signal. The unique functions of these devices can be used for WDM optical communication and sensor systems.

서지기타정보

서지기타정보
청구기호 {DPH 99027
형태사항 [iv], 103 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : In-Kag Hwang
지도교수의 한글표기 : 김병윤
지도교수의 영문표기 : Byoung-Yoon Kim
수록잡지명 : "All-fiber nonreciprocal comb filter with wavelength tunability". Optics Letters, vol. 10, no. 10, pp. 1437-1439 ()
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 98-103
주제 광섬유
모드 결합
파장필터
장주기 격자
음향광학 소자
Optical fiber
Mode coupling
Filter
Long period grating
Acousto-optic device
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