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在薄膜酸盐上集成的femtosecond脉冲发生器
Mengjie Yu1,2, David Barton Iii1, Rebecca Cheng1
1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.
Nature
|November 17, 2022
概括
这项研究引入了一种新的芯片尺度的酸盐秒脉冲源,提供可调节,强大的,低成本的光源. 它克服了以前用于光学原子钟和量子计算的方法的局限性.
科学领域:
- 光子学和光学工程
- 集成光学
- 超快激光器
背景情况:
- 集成的秒脉冲和频率源对于光学原子钟,微波光子和光谱等应用至关重要.
- 现有的芯片脉冲生成方法,如微共振器模式锁定,在噪声性能,波长和重复率调整方面面临限制.
- 使用电光调制器的替代方法可以合成亚皮秒脉冲,但通常需要复杂的稳定.
研究的目的:
- 展示一个新的芯片尺度的秒脉冲源使用一个集成的酸盐光子平台.
- 克服现有的集成脉冲光源在调整性,强度和成本方面的局限性.
- 为先进的光学应用提供高效的连续波转换方法.
主要方法:
- 使用酸芯片上的级联低损耗电光振幅和相位调节器实现时间镜头系统.
- 集成与一个的布拉格格,用于脉冲塑造.
- 使用连续波分布式反激光和单个连续波微波源来驱动系统,从而消除了复杂稳定性的需要.
主要成果:
- 产生520 femt秒的脉冲列车和30 gigahertz的重复率.
- 用12.6纳米的10分贝光学带宽观察平面光学光谱.
- 单个线功率超过0.1毫瓦,脉冲能量为0.54皮克朱尔,转换效率明显高于以前的集成源.
结论:
- 展示的集成酸盐装置提供可调节,强大且低成本的五秒脉冲源.
- 与现有的集成源相比,这种技术在连续波转换成脉冲效率上提供了数量级的改进.
- 脉冲发生器非常适合用于超快的光学测量和分布式量子计算机网络.
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