Diamond-blade diced trapezoidal ridge waveguides in YCOB crystal for second harmonic generation

Diamond-blade diced trapezoidal ridge waveguides in YCOB crystal for second harmonic generation
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用于产生二次谐波的 YCOB 晶体中金刚石刀片切割梯形脊波导

DOI:
10.1016/j.optlastec.2020.106128
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发表时间:
2020-06
影响因子:
5
通讯作者:
Shengqiang Zhou
Shengqiang Zhou
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chen Chen;Qingming Lu;Shavkat Akhmadaliev;Shengqiang Zhou

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采用碳离子辐照和金刚石刀片切割技术在YCOB非线性光学晶体中制备了梯形脊波导。具有光滑侧壁的切割脊允许近红外(1064 nm)光导,传播损耗约为1 dB/cm。用合理的方法重建了波导的折射率分布。利用I型双折射相位匹配在室温下产生了绿色二次谐波光。在连续和脉冲激光泵浦下,导波倍频的转换效率分别可以达到~ 1.10%W − 1和~ 6.22%。
Trapezoidal ridge waveguides have been fabricated in YCOB nonlinear optical crystals by carbon ion irradiation and precise diamond-blade dicing. The diced ridges with smooth side-walls allow for near-infrared (1064 nm) light guiding with propagation losses around 1 dB/cm. Refractive index profile of a waveguide has been reconstructed in a reasonable manner. Green second harmonic light have been generated at room temperature via type I birefringent phase matching. Under the pump of continuous and pulsed lasers, conversion efficiencies for guided-wave frequency doubling can be up to ~1.10% W−1and ~6.22%, respectively.
通过对 LiNbO3 晶体进行快速重离子照射来改善光引导的折射率工程
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