Miniaturized Blue Laser using Second Harmonic Generation
Miniaturized Blue Laser using Second Harmonic Generation
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使用二次谐波产生的小型蓝色激光器
DOI：
10.1143/jjap.39.3416
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发表时间：
2000
影响因子：
1.5
通讯作者：
Kazuhisa Yamamoto
中科院分区：
文献类型：
--
作者：
Y. Kitaoka;T. Yokoyama;K. Mizuuchi;Kazuhisa Yamamoto
我们展示了一种利用二次谐波产生（SHG）的小型化蓝色激光器（5×12×1.5立方毫米），它由在x切向掺镁铌酸锂衬底上的准相位匹配（QPM）-SHG波导器件和一个可调谐分布式布拉格反射（DBR）激光二极管组成。通过在x切向衬底上使用QPM - SHG波导器件，无需半波片就实现了高效的光耦合，并且达到了75%的最大耦合效率。对于20毫瓦的基波耦合功率，产生了2毫瓦的蓝光功率，这与10%的转换效率相符。对平面型对接耦合SHG蓝色激光器的机械稳定性进行了检测，在模块温度变化以及10到60°C的温度循环测试下，耦合效率保持恒定。我们成功地将SHG蓝色激光器的尺寸缩小到0.1立方厘米，对于其在光盘系统中的应用来说，这个尺寸足够小。
We demonstrate a miniaturized blue laser (5×12×1.5 mm3) using second harmonic generation (SHG), which consists of a quasi-phase-matched (QPM)-SHG waveguide device on an x-cut Mg-doped LiNbO3 substrate and a tunable distributed-Bragg-reflector (DBR) laser diode. By using the QPM-SHG waveguide device on an x-cut substrate, efficient optical coupling was realized without a half-wave plate, and the maximum coupling efficiency of 75% was achieved. The blue light power of 2 mW was generated for the fundamental coupling power of 20 mW, which agreed with a conversion efficiency of 10%. The mechanical stability of the planar-type butt-coupled SHG blue laser was examined, where the coupling efficiency was maintained constantly under the change of module temperature and the temperature cycle test from 10 to 60°C. We succeeded in downsizing the SHG blue laser to 0.1 cm3, which is sufficiently small for its application to optical disk systems.