• Current Optics and Photonics
• /
• 제3권3호
• /
• pp.236-242
• /
• 2019

An Nd:YAG slab structure was designed for a high-power zigzag slab laser amplifier based on computational simulation of the wavefront distortion. For the simulation, the temperature distribution in the slab was calculated at first by thermal analysis. Then, the optical path length (OPL) was obtained by a ray tracing method for the corresponding refractive index variation inside the slab. After that, the OPL distribution of the double-pass amplified beam was calculated by summing the results obtained for the first and second passes. The amount of wavefront distortion was finally obtained as the peak-to-valley value of the OPL distribution. As a result of this study, the length and position of the gain medium were optimized by minimizing the transverse wavefront distortion. Under the optimized conditions, the transverse wavefront distortion of the double-pass amplified beam was less than $0.2{\mu}m$ for pump power of 14 kW.

• 한국광학회지
• /
• 제4권3호
• /
• pp.354-358
• /
• 1993

지그재그 슬랩 레이저의 글라스 내부 온도분포를 마하-젠더 간섭계로 측정하였다. 슬랩 레이저글라스의 파괴 원인은 슬랩글라스의 표면과 중심부의 온도차로 이 온도차 ${\Delta}T_0$가 $110^{\circ}C$, $62^{\circ}C$에서 두 장의 레이저글라스가 파괴되었다. 고평균출력 글라스레이저를 설계하는데 있어서 안전 작동을 이하여 슬랩글라스 표면과 중심부의 온도차 ${\Delta}T_0$가 $50^{\circ}C$를 넘지 않도록 해야한다.