The Quasi-phase-matching periodically poled flux-grown KTP by high electrical field method is researched. A 8×5×1mm3,∧=9.0μm PPKTP wafer is successfully fabricated for the first order QPM SHG. The interact...The Quasi-phase-matching periodically poled flux-grown KTP by high electrical field method is researched. A 8×5×1mm3,∧=9.0μm PPKTP wafer is successfully fabricated for the first order QPM SHG. The interactive length of the sample is about 3mm. The SHG scheme of Nd: YAG at 1064nm tested that the output power of cw 532nm green light is 0.2mw at room temperature with fundamental power of 1.2w. The normalized conversion efficiency is about 0.09% (W·cm)-1.展开更多
目前经典的虚拟低音增强技术的时域算法存在比较明显的非线性失真。对基于非线性器件的虚拟低音增强算法进行了研究和改进,引入自适应格型陷波滤波器进行频率追踪,并改进了传统的谐波产生方法。Rnonlin客观模型与隐藏参考和基准的多刺激...目前经典的虚拟低音增强技术的时域算法存在比较明显的非线性失真。对基于非线性器件的虚拟低音增强算法进行了研究和改进,引入自适应格型陷波滤波器进行频率追踪,并改进了传统的谐波产生方法。Rnonlin客观模型与隐藏参考和基准的多刺激法(multistimuli with the hidden reference and anchor,MUSHRA)主观听音实验的结果表明,改进后的时域虚拟低音增强算法音质明显得到改善,低音感知效果得到一定的提高。展开更多
基金This work is supported by scientific research key project fund of Ministry of Education (02042)
文摘The Quasi-phase-matching periodically poled flux-grown KTP by high electrical field method is researched. A 8×5×1mm3,∧=9.0μm PPKTP wafer is successfully fabricated for the first order QPM SHG. The interactive length of the sample is about 3mm. The SHG scheme of Nd: YAG at 1064nm tested that the output power of cw 532nm green light is 0.2mw at room temperature with fundamental power of 1.2w. The normalized conversion efficiency is about 0.09% (W·cm)-1.
文摘目前经典的虚拟低音增强技术的时域算法存在比较明显的非线性失真。对基于非线性器件的虚拟低音增强算法进行了研究和改进,引入自适应格型陷波滤波器进行频率追踪,并改进了传统的谐波产生方法。Rnonlin客观模型与隐藏参考和基准的多刺激法(multistimuli with the hidden reference and anchor,MUSHRA)主观听音实验的结果表明,改进后的时域虚拟低音增强算法音质明显得到改善,低音感知效果得到一定的提高。
