Characteristics of multipass amplification of Ti:sapphire laser for DIAL

DIAL용 Ti:sapphire 레이저의 다중통과 증폭특성

  • Published : 1996.09.01

Abstract

Multipass Ti:sapphire amplifier for the light source of DIAL was developed with an angular-multi-plexing, and the characteristics of output energy and spectra were investigated. As the characteristics of two-stage multipass amplifier, the maximum output energy was 22 mJ and the amplification gain was 20 dB on the wavelength of 790 nm. At that condition, output efficiency of the pumping energy was 18 percent. We obtained $0.15cm^{-1}$ (9.4 pm) as a spectral linewidth in the tuning range of 705~845 nm.

DIAL의 레이저광원으로 사용하는 다중통과 Ti:sapphire의 증폭시스템을 각-다중방식으로 개발하고 출력에너지와 스펙트럼 특성을 조사하였다. 개발된 2단의 다중통과 증폭기의 특성은 790nm파장에서 최대 출력에너지는 22mJ, 증폭이득은 20dB, 펌핑에너지에 대한 출력효율은 18%이다. 또한 스펙트럼선폭은 파장가변 범위 705-845nm에서 0.15$cm^{-1}$ /(9.3pm)이다. 최대 출력에너지 때 레이저빔 발산각은 X, Y축에서 각각 1.1, 1.5mrad이며 레이저빔의 quality factir N$^{2}$은 2.6이다.

Keywords

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