서지주요정보
유도 브릴루앙 산란의 위상공액 특성을 이용한 광선 재결합 레이저의 발진 특성 = Beam combination characteristics of $Nd^{3+}$:YAG array laser using stimulated brillouin scattering
서명 / 저자 유도 브릴루앙 산란의 위상공액 특성을 이용한 광선 재결합 레이저의 발진 특성 = Beam combination characteristics of $Nd^{3+}$:YAG array laser using stimulated brillouin scattering / 박희수.
저자명 박희수 ; Park, Hee-Su
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8007299

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 97009

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Stimulated Brillouin scattering(SBS) phase conjugate mirrors are used for coupling of parallel gain media(beam combination) in a repetition-type Nd:YAG laser system. The characteristics of SBS reflection and the beam combination were investigated with experiments and simulations. The beam combination means the coupling of parallel amplifiers to form a single coherent output beam. The technique can be used for achieving high power and high repetition solid state laser beyond traditional limits imposed by the maximum available volume of a single active medium. These limits mainly arise from crystal growth technology and thermal effects. In this experiment, the wave front of the input beam was divided using square type wedges. Then each divided beam was amplified separately, reflected by SBS mirrors and recombined. The stimulated Brillouin scattering results from parametric coupling between light and acoustic waves. The SBS process has properties of phase conjugation, pulse compression, beam smoothing, and so on. Phase conjugation of backward scattered beam by these SBS mirrors compensated aberrations in the laser gain media. The laser system used in the experiments had MOPA(master oscillator and power amplifier) configuration. A SBS mirror($CCl_4$) was inserted in the middle of the amplifier chain. The reflectivity of the mirror depended on the input energy, and had maximum 35% in the experiment. This reflectivity characteristic was used for optical isolation, that is, blocking of the back-reflected beam from the next SBS mirrors. Simulations for the beam combination showed how the output beam characteristics change with different phase distribution between the separated beams. The changes of the spatial beam profiles observed in the beam combination procedure were similar to the simulation results. The aberration compensation effect was confirmed, but the gap between squares appeared in the combined pattern. This gap is thought to be due to the relative phase difference between them.

서지기타정보

서지기타정보
청구기호 {MPH 97009
형태사항 iv, 83 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hee-Su Park
지도교수의 한글표기 : 공홍진
지도교수의 영문표기 : Hong-Jin Kong
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 81-83
주제 유도 브릴루앙 산란
위상공액
광선 재결합
SBS
Stimulated brillouin scattering
Phase conjugation
Beam combination
Array laser
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