用于大口径钛宝石放大器的四路钕玻璃抽运源

Four-Outputs Nd∶glass Pump Source for Large Aperture Ti∶Sapphire Amplifier

研制了一套能量输出稳定、光斑分布均匀、时域近方波形的四路钕玻璃抽运源系统。系统能够输出4×180J的基频能量(波长为1053nm),4×80J的倍频能量(波长为526.5nm)。主要结构包括四部分:前端种子源、再生放大器、钕玻璃棒放链和KDP倍频晶体。利用偏振片实现了垂直偏振的两路基频光合束,经过第二类相位匹配KDP晶体倍频,获得了共线且同偏振的526.5nm倍频光,实现了用于150mm口径钛宝石放大器的结构紧凑的双脉冲抽运源。

We built a set of four-outputs Nd∶glass pump source system with stable energy output,uniform spot and time-domain approximate square waveform.The system can achieve output of 4×180 Jat 1053 nm in fundamental frequency and 4×80 Jat 526.5 nm in double frequency.The main structure consists of 4 parts,which are the front-end seed source,the regenerative amplifier,Nd∶glass rod amplifier chain and the KDP frequency doubling crystal.Those two fundamental frequency beams with vertical polarization are combined by the polarizer.The 526.5 nm double frequency laser pulse with the same directivity and polarization is obtained after Type-Ⅱ phase matching frequency-doubling KDP crystal.As a result,the compact dual pulse pump source for the Ti∶sapphire amplifier is realized.