상세정보
학술지
Optimizations of the Thickness and the Operating Temperature of LiB3O5, BaB2O4, and KTiOPO4 Crystals for Second Harmonic Generation
- 저자
- 박두재, 주홍, 조원배, 최수봉
- 발행일
- 201512
- 출처
- 새물리, v.65 no.12, pp.1234-1240
- ISSN
- 0374-4914
- 출판사
- 한국물리학회 (KPS)
- 협약과제
- 15ZC1800, 고에너지 즉발 감마선 측정 기반 입자빔 비정 결정 기술 개발, 김승환
- 초록
- We demonstrate a theoretical study for determining the optimal crystal thickness and operating temperature when generating a second harmonic of a pulse laser with pulsewidths ranging from a few tens of femtosecond to a few nanosecond by using commonly-used nonlinear crystals of lithium barium borate, beta barium borate, and potassium titanyl phosphate. The optimal thicknesses of those crystals to avoid any pump pulse depletion for a fundamental-mode laser pulse having a high intensity and a long pulsewidth was calculated as a function of the intensity and the pulsewidth of the fundamental mode. Also, for short-pulse operation, thickness limits are calculated for conditions under which no pulse dispersion due to group velocity mismatch is observed. Finally, the fluctuation of second-harmonic yield due to temperature variations which introduce a refractive-index change is calculated, and the effective temperature ranges are demonstrated for room-temperature operation.
- KSP 제안 키워드
- Crystal thickness, Effective temperature, Group velocity mismatch, Laser pulse, Nonlinear crystals, Pulse laser, Refractive index change, Room-temperature operation, Second Harmonic Generation, Short-pulse, Temperature variations