100 W class average power coherent 2-beam combination laser system at 1 kHz repetition rate operation using self-phase-controlled stimulated Brillouin scattering phase conjugate mirrors with pre-pulse = 전단 펄스가 적용된 자체 위상 제어되는 유도 브릴루앙 산란 위상 공액 거울을 이용한 평균출력 100 W급, 1 kHz 반복률의 결맞는 2빔 결합 레이저 시스템

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Coherent beam combining is one of the most promising technique to develop a high power laser with high repetition rate and high energy. To combine beams coherently, the wavefronts of the beams should be same and the relative phase difference should be 0. A stimulated Brillouin scattering phase conjugate mirror (SBS-PCM) is proper to the coherent beam combining, because the double pass amplified beam can be same with the input beam by its phase conjugation property. Also, by self-phase-control method, the inherent initial phase can be fixed and is easy to control the relative phase difference by piezoelectric transducer. In this research, the SBS reflection properties are investigated for the main amplifier of the kHz class LD-pumped laser system, the Kumgang laser system. As a result, a steep edge at the pulse temporal waveform of the SBS reflected pulse is observed. To prevent damages in the optical components and the gain media during double pass amplification, the pre-pulse technique is applied and the double pass amplified beam properties are investigated. With these results, the coherent 2-beam combination of the Kumgang laser double pass amplified beam is performed.
Advisors
Kong, Hong Jinresearcher공홍진researcher
Description
한국과학기술원 :물리학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 물리학과, 2017.8,[vi, 105 p. :]

Keywords

high repetition rate▼ahigh power laser▼aphase conjugate mirror▼astimulated Brillouin scattering▼acoherent beam combining; 고반복율▼a고출력 레이저▼a위상 공액 거울▼a유도 브릴루앙 산란▼a결맞는 빔 결합

URI
http://hdl.handle.net/10203/241784
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=718813&flag=dissertation
Appears in Collection
PH-Theses_Ph.D.(박사논문)
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