采用LD抽运腔内倍频532 nm Nd∶YAG激光器作抽运源, 通过合理的谐振腔膜系设计, 只使用一个输出镜就实现了可调谐钛宝石固体激光器(DPL)697～942 nm的可调谐激光输出。在18 W的抽运功率下, 其输出功率为3.5 W, 重复频率为3.9 kHz; 通过采用I类相位匹配的LBO晶体(LiB3O5, Θ=90°,Φ=33.2°, 3 mm×6 mm×20 mm)进行腔外倍频后实现了波长350～465 nm平均功率达540 mW(400 nm)连续可调的蓝紫激光输出; 通过激光聚焦导光系统、扫描控制系统软硬件的设计开发, 使该系统实现了计算机控制的程序曝光。该系统主要用于计算机直接制版技术(CTP)版材的研制开发。

An all-solid-state quasi-continuous-wave (QCW) tunable Ti∶sapphire laser system from 697 nm to 942 nm by using single output mirror is reported, which was pumped by an intra-cavity frequency doubling Nd∶YAG laser at 532 nm. Under the pump power of 18W at 532 nm with the repetition rate of 3.9 kHz, the average output power of 3.5 W at 795 nm with an optical conversion efficiency of 20% was yielded. Through extra-cavity frequency doubling with the nonlinear crystal LBO (LiB3O5, 3 mm×6 mm×20 mm), cut for critical type I phase matching (Θ=90°,Φ=33.2°) at room temperature, tunable second-harmonic generation (SHG) from 350 nm to 465 nm was achieved. The average output power at 400 nm was 540 mW. Through the design of laser focus system , the scan and control system, the whole laser can be used to expose the CTP material. In this way, the capability of the CTP material can be valued.