采用自制的全固态高功率532 nm单频绿光激光器端面抽运布氏角切割的钛宝石晶体, 设计了紧凑、稳定、像散自补偿的嵌入式六镜环形谐振腔结构。通过调节抽运光与振荡光之间的最佳模式匹配关系, 实现了高光束质量、高转换效率的900 nm波段全固态单频可调谐钛宝石激光器。当抽运功率为15 W、输出镜在922 nm处定点透射率为4.5%时, 获得了平均输出功率大于2 W、波长可调谐范围为852~934 nm的宽带可调谐单频红外激光器, 3 h内的功率稳定性优于±0.7%, 光束质量因子M2<1.04。

By pumping the Ti∶sapphire crystal cutted by the Brewster angle with a homemade all-solid-state high-power 532 nm single-frequency green laser, we design a compact, stable and self-compensating embedded six-mirror ring resonator structure. By adjusting the best mode matching relationship between pumping light and oscillating light, we establish an all-solid-state single-frequency tunable Ti∶sapphire laser with high beam quality and high conversion efficiency at 900 nm. With the pump power of 15 W and the output mirror fixed point transmission of 4.5% at 922 nm, the broadband tunable single-frequency infrared laser with average output power of more than 2 W and tunable wavelength range from 852 nm to 934 nm is obtained. The power stability is better than ±0.7% within 3 h and the beam quality factor M2 is less than 1.04.