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首页> 外文期刊>Optics Letters >466 mW green light generation using annealed proton-exchanged periodically poled MgO: LiNbO_(3) ridge waveguides
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466 mW green light generation using annealed proton-exchanged periodically poled MgO: LiNbO_(3) ridge waveguides

机译：使用退火的质子交换的周期性极化MgO：LiNbO_（3）脊形波导产生466 mW绿光

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摘要

We report high-power efficient green light generation by frequency doubling from a periodically poled MgO doped LiNbO_(3) ridge waveguide. The ridge waveguide is fabricated by the annealed proton-exchanging and precise diamond blade dicing techniques. The ridge structure exhibits a surface roughness of only 3.7 nm, and near-90 deg vertical sidewall. The total insertion loss of an 8.5 (mu)m wide and 1.4 cm long uncoated waveguide is 3.0 dB under direct fiber coupling. 466 mW of continuous-wave green light with an optical-to-optical conversion efficiency of 69.7percent is obtained. To the best of our knowledge, this is the highest green light output power reached to date using a ridge-type LiNbO_(3) waveguide device. Phase-matching temperature shift, tuning curve distortion, and waveguide loss increase are observed under high power operation. Our analysis shows that the photorefractive effect and the green induced infrared absorption are responsible for the observed phenomena, which becomes prominent under several megawatt per square centimeter power density.
机译：我们报告了通过周期性极化MgO掺杂的LiNbO_（3）脊形波导倍频来产生高功率的高效绿光。脊形波导是通过退火的质子交换和精确的金刚石刀片切割技术制成的。脊结构的表面粗糙度仅为3.7 nm，垂直侧壁接近90度。在直接光纤耦合下，宽8.5μm，长1.4 cm的未镀膜波导的总插入损耗为3.0 dB。获得了466 mW的连续波绿光，其光-光转换效率为69.7％。据我们所知，这是迄今为止使用脊型LiNbO_（3）波导器件达到的最高绿光输出功率。在高功率操作下，观察到相位匹配温度偏移，调谐曲线失真和波导损耗增加。我们的分析表明，光折射效应和绿色诱导的红外吸收是观察到的现象的原因，在几兆瓦每平方厘米的功率密度下，这种现象尤为突出。

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