서지주요정보
재생 조화 모드록킹 GHz Nd:YLF 레이저에 관한 연구 = Regenerative harmonic mode-locking of a GHz Nd:YLF laser
서명 / 저자 재생 조화 모드록킹 GHz Nd:YLF 레이저에 관한 연구 = Regenerative harmonic mode-locking of a GHz Nd:YLF laser / 유태준.
저자명 유태준 ; Yu, Tae-Jun
발행사항 [대전 : 한국과학기술원, 2002].
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소장정보

등록번호

8013248

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 02011

SMS전송

도서상태

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반납예정일

초록정보

An actively mode-locked laser with a high average power at a high repetition rate was designed and constructed. A harmonic mode locking technique and a regenerative feedback loop method were applied to realize an actively mode-locked Nd:YLF laser. A Numerical simulation was performed to obtain a stably operative condition of the laser. In this thesis, we present the design and construction of a regeneratively third harmonic mode-locked 1 GHz Nd:YLF lasers operating with a long term stability. A Nd:YLF laser has been actively mode-locked at the third-order harmonic cavity frequency using a phase modulator. This laser cavity consisted of an active medium with a diode pumping, a MgO:$LiNbO_3$ phase modulator, an etalon, and a folded laser cavity including a folding mirror and an output coupler. The regenerative feedback loop consisted of a high-speed photo-diode on a linear translator as a phase shifter, a high gain radio frequency (RF) amplifier, and a phase modulator. A 1 GHz RF signal to drive the phase modulator was obtained from a 1 GHz pulse train, without using a RF synthesizer as a driver of an active mode locker, which solved the synchronization problem in the phase modulator by automatically tracking any change in the cavity length. The numerical simulation on the regeneratively harmonic mode-locked laser showed that an insertion of an etalon could provide a stable laser operation by avoiding a mode competition problem. We achieved a stable 1 GHz pulse train with a pulse duration of 6.3 ps, and an average output power of 250 mW at 1053 nm. This laser has a good potential for many applications, such as a photocathode laser to generate high current photoelectrons useful for high power free electron lasers or particle accelerators.

서지기타정보

서지기타정보
청구기호 {DPH 02011
형태사항 [ii], 111 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Tae-Jun Yu
지도교수의 한글표기 : 남창희
지도교수의 영문표기 : Chang-Hee Nam
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 107-111
주제 모드록킹 레이저
조화 모드록킹
재생 모드록킹
Mode-locking
Harmonic mode-locking
Regenerative mode-locking
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