서지주요정보
펄스형 Nd:YAG 레이저의 결합형 모드록킹에서 포화흡수체의 위치에 따른 Picosecond 펄스 출력의 안정화 = Effect of saturable absorber position on the stability of picosecond pulse output for an active-passive mode-locked Nd:YAG laser
서명 / 저자 펄스형 Nd:YAG 레이저의 결합형 모드록킹에서 포화흡수체의 위치에 따른 Picosecond 펄스 출력의 안정화 = Effect of saturable absorber position on the stability of picosecond pulse output for an active-passive mode-locked Nd:YAG laser / 이정환.
저자명 이정환 ; Lee, Jung-Hwan
발행사항 [대전 : 한국과학기술원, 1991].
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소장정보

등록번호

8002262

소장위치/청구기호

학술문화관(문화관) 보존서고

DAP 9119

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Active-passive mode-licking of a pulsed Nd:YAG laser, which was designed and constructed in the laboratory, has been achieved by using an acousto-optic modulator and saturable absorbers such as BDN/iodoethane, Kodak dyes #26 and #9860/1, 2-dichloroethane solutions to improve the shot-to-shot stability and reproducibility of the mode-locked pulses. The active-passive mode-locked laser was found to display a sharp lasing threshold and a high success rate of mode-locking(1 or 2 miss during 200 laser shots) and the shot-to-shot stability considerably improved compared to purely passive mode-locking, where the cavity length should be adjusted within ±0.1mm to obtain best results. The effect of the saturable absorber position has been investigated for active- passive mode-locking in a Fabry-Perot cavity configuration. The saturable absorber placed at the center of the laser cavity was found to produce more stable mode-locked pulses without satellite pulses, which were very frequently observed when attempting purely passive mode-locking, than a contacted dye cell configuration. This improvement was concluded to be attributed to the complete suppression of the satellite pulses by the maximum loss of the acousto-optic modulator. The mode-locked pulse width was measured by an autocorrelator using a well-known second harmonic generation (SHG) method, where a collinear type I $KH_2PO_4$ crystal was utilized for SHG, and found to be 23ps. The shot-to shot energy stabilities of the mode-locked pulse and its frequency-doubled output was within ±1.9% and ±2.7%, respectively. Also, the displacement of the saturable absorber position from the exact center of the laser cavity was found not to be critical. When the saturable absorber was moved ±3cm from the center of the cavity, the pulse widths remained unchanged within the standard deviation of the second harmonic signals, which was in the range of ±3~4%.

서지기타정보

서지기타정보
청구기호 {DAP 9119
형태사항 iv, 89 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jung-Hwan Lee
지도교수의 한글표기 : 공홍진
지도교수의 영문표기 : Hong-Jin Kong
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 85-89
주제 Mode-locked lasers
Stability
Pulse generators
YAG 레이저 --과학기술용어시소러스
모드 동기 --과학기술용어시소러스
안정성 --과학기술용어시소러스
흡수체 --과학기술용어시소러스
Nd-YAG lasers
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