蓝光抽运掺镨氟化钇锂橙光激光器

Blue Laser Pumped Pr： YLF Orange Laser

报道了蓝光半导体激光抽运的掺镨氟化钇锂（Pr：YLF）橙光607nm固体激光器。光抽运半导体激光器（OPSL）与激光二极管（LD）相比具有光束质量好、输出功率高、吸收效率高等优点，因此采用OPSL作为抽运源有助于提高Pr：YLF激光器性能。分别测量了Pr：YLF在橙光波段内常温（300K）和低温（12K）时的偏振发射光谱，表明该晶体的橙光3P0→3H6跃迁主要包含6条发射谱线。采用最高输出功率为1．9W，中心波长为479．2nm的OPSL作为抽运源，以及长度为5mrn、掺杂原子数分数为0．5％的Pr：YLF晶体作为增益介质，在平凹腔结构下获得的橙光607nm最大输连续输出功率为524mW，对应斜率效率为39．1％。

Blue semiconductor laser pumped Pr：YLF orange laser at 607 nm is reported. Compared to laser diodes （LDs）, the optically pumped semiconductor lasers （OPSLs） have better beam quality, higher output power and higher absorption efficiency. So pumping with OPSLs can help to improve the laser performance. The polarized emission spectra of Pr： YLF in the orange band at 12 K and 300 K are measured, showing that the orange transition 3 Po→3 H6 consists of 6 emission lines. An OPSL providing output power of up to 1.9 W and centered at 479.2 nm is used as the pump source. With a 5 mm-long Pr： YLF crystal with a doping concentration of 0.5 % and a piano-concave cavity, orange laser emission at 607 nm with an output power of 524 mW is obtained, corresponding to a slope efficiency of 39.1%.