서지주요정보
원통형 PZT로 구성한 광섬유 편광스크램블러에 관한 연구 = Fiber-optic polarization scrambler based on cylindrical PZT modulators
서명 / 저자 원통형 PZT로 구성한 광섬유 편광스크램블러에 관한 연구 = Fiber-optic polarization scrambler based on cylindrical PZT modulators / 여영배.
저자명 여영배 ; Yeo, Yeong-Bae
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8006682

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 96018

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

All fiber-optic polarization scrambler based on cylindrical PZT modulators was demonstrated. The device was designed to depolarize, on the time average basis, coherent light for an arbitrary input state of polarization. Two independent polarization modulators were cascaded to form a polarization scrambler. Each polarization modulator was fabricated by wrapping a few tens of turns of single-mode fiber around a cylindrical PZT transducer. This polarizaton modulator is driven at a few hundred kilohertz, where relatively large birefringence modulation takes place due to acoustic pressure generated by the vibration of the PZT wall. Relatively low birefringence(less than 200˚/m) fiber was selected after measuring and comparing the intrinsic birefringence levels of several fibers. To reduce undesirable effects of the intrinsic birefringence on the performance of polarization modulators, PZT cylinders with small diameter were used and the fibers were coiled with high tension. The polarization modulation depth of each polarization modulator was measured by analyzing the Fourier spectrum of the polarization modulated signal and adjusted to be 2.4 radian. Two cascaded polarization modulators were deriven at different modulation frequencies. By adjusting the relative angle of the cylinder axis between the two PZT cylinders, polarization independent fiber-optic polarization scrambler was realized. In the experiments with a 1.3㎛ laser source, a reduction in the degree of polarization, P, to 0.01 was achived for arbitrary input state of polarization. The performance degradation from P=0.01 to P=0.05 was observed by increasing temperature by 20℃.

서지기타정보

서지기타정보
청구기호 {MPH 96018
형태사항 iii, 49 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Yeong-Bae Yeo
지도교수의 한글표기 : 김병윤
지도교수의 영문표기 : Byoung-Yoon Kim
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 46-49
주제 편광 스크램블러
편광도
편광소멸기
편광변조
Polarization Scrambler
PZT transducer
Degree of polarization
Depolarizer
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