Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Dependence of CW Mode Locking on Resonator Mode Size in a Yb:YAG Laser Mode-Locked by a Semiconductor Saturable Absorber Mirror

반도체 포화 흡수체 반사경에 의해 모드 잠금된 Yb:YAG 레이저 출력의 공진기 모드 크기에 대한 의존성 연구

  • Kim, Hyun Chul (Department of Photonic Engineering, Chosun University) ;
  • Lim, Han Bum (Department of Photonic Engineering, Chosun University) ;
  • Chae, Dong Won (Department of Photonic Engineering, Chosun University) ;
  • Kim, Hyun Su (Department of Photonic Engineering, Chosun University)
  • 김현철 (조선대학교 광기술공학과) ;
  • 임한범 (조선대학교 광기술공학과) ;
  • 채동원 (조선대학교 광기술공학과) ;
  • 김현수 (조선대학교 광기술공학과)
  • Received : 2015.07.03
  • Accepted : 2015.11.09
  • Published : 2015.12.25
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Abstract

We investigate the effect of laser-resonator mode size on the output of a Yb:YAG laser that is mode-locked by a semiconductor saturable absorber mirror (SESAM). We demonstrate that the smaller the product of the mode sizes at a SESAM and at a Yb:YAG crystal, the more stable the mode-locked output is. Also, we found numerically that there is a resonator length at which the mode-locked output occurs, regardless of the thermal lens effect of a Yb:YAG.

레이저 공진기 모드 크기가 반도체 포화 흡수체 거울(SESAM)을 이용하여 모드 잠금된 Yb:YAG 레이저의 출력에 주는 영향을 조사하였다. SESAM과 Yb:YAG 매질 위치에서 공진 모드들 크기를 곱한 값이 작을수록 모드 잠금이 안정적으로 발생함을 실험적으로 보였다. 수치적으로 레이저 매질의 열 렌즈 효과와 무관하게 모드 잠금이 이루어지는 공진기 길이 조건이 있음을 확인하였다.

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References

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