서지주요정보
유도 Brillouin 산란 위상공액 거울을 이용한 4중 경로 증폭계의 특성에 관한 연구 = Characteristics of 4pass amplifier system with a stimulated Brillouin scattering phase conjugation mirror
서명 / 저자 유도 Brillouin 산란 위상공액 거울을 이용한 4중 경로 증폭계의 특성에 관한 연구 = Characteristics of 4pass amplifier system with a stimulated Brillouin scattering phase conjugation mirror / 박승현.
저자명 박승현 ; Park, Seung-Hyun
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012651

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 02011

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Investigation on the characteristics of degenerate 4-pass amplifier system with a stimulated Brillouin scattering phase conjugation mirrors(SBS PCM) was performed in this study. $Nd^{3+}$:YAG was used as gain medium for the double pass amplifier and FC-75 index matching oil was used as phase conjugation mirror medium. We have tested the 4 pass amplifier using SBS-PCM as a rear mirror. The input beam energy is less than 1mJ. In the case using SBS-PCM as a rear mirror the output energy is 108mJ and in the case using mirror the output energy is 135mJ at the 35J electrical pumping energy. It's reason that reflectivity of SBS-PCM is lower than that of mirror in the lower input energy. In the 4 pass amplifier system, the distorted beam profile and its imperfect polarization states are originated from the thermally induced distortion effect. In the case of using a conventional mirror as a rear mirror, its beam profile is distorted very much and its polarization does not rotate 45° exactly by the Faraday rotator due to the thermally induced birefringence effect. In order to compensate this effect, we employ SBS-Phase conjugation mirror as a rear mirror. In the case of using a SBS-PCM, the beam profile shows that the distortions are compensated and its profile is much better than the former case of using a conventional mirror. And polarization distortion by thermal birefringence was measured in the case of four pass amplifier with SBS-PCM using Faraday Rotator and Quarter Wave Plate. Using a Faraday rotator between amplifier and mirror, the polarization was considerably compensated. On the contrary, using Quarter Wave Plate, the polarization distortion was not compensated. It is verified experimentally that the depolarization of a laser pulse in the four-pass amplifier with a Faraday rotator was only 1/10 of that with a quarter-wave plate. To summarise, using SBS-PCM as a rear mirror in the four pass amplifier we can improve beam quality and compensate thermal distortion in the four pass amplifier.

서지기타정보

서지기타정보
청구기호 {MPH 02011
형태사항 iv, 59 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Seung-Hyun Park
지도교수의 한글표기 : 공홍진
지도교수의 영문표기 : Hong-Jin Kong
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 56-59
주제 유도브릴루앙산란
SBS
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