Optically referenced 300 GHz millimetre-wave oscillator
Optically referenced 300 GHz millimetre-wave oscillator
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DOI：
10.1038/s41566-021-00790-2
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发表时间：
2021-04
期刊：
影响因子：
35
通讯作者：
T. Tetsumoto;T. Nagatsuma;M. Fermann;G. Navickaite;M. Geiselmann;A. Rolland
中科院分区：
文献类型：
--
作者：
T. Tetsumoto;T. Nagatsuma;M. Fermann;G. Navickaite;M. Geiselmann;A. Rolland
通过光频梳（OFC）的光频分（OFD）实现了微波计量的飞跃，从而实现了以前从未探索过的噪声性能。将该方法扩展到毫米波（mmW）和太赫兹（THz）波域是非常感兴趣的。集成光子芯片中的耗散克尔孤子（DKS）提供了一种独特的功能，即提供具有10 GHz至1 THz重复频率的OFC，使其成为在毫米波和太赫兹波域中执行OFD的相关齿轮。我们实验证明OFD的光载3.6太赫兹参考下降到300 GHz通过DKS，光电探测与超快单行进载波光电二极管（UTC-PD）。一个新的测量系统，基于微波参考锁相到300 GHz的测试信号的特性，产生阿秒级的定时噪声灵敏度，利用传统的技术限制。这项工作使DKS成为毫米波和太赫兹波领域的领先技术，有望在基础和民用应用中取得突破。
Optical frequency division (OFD) via optical frequency combs (OFC) has enabled a leap in microwave metrology leading to noise performance never explored before. Extending the method to millimeter-wave (mmW) and terahertz (THz)-wave domain is of great interest. Dissipative Kerr solitons (DKSs) in integrated photonic chips offer a unique feature of delivering OFCs with ultrahigh repetition rates from 10 GHz to 1 THz making them relevant gears to perform OFD in the mmW and THz-wave domain. We experimentally demonstrate OFD of an optically-carried 3.6 THz reference down to 300 GHz through a DKS, photodetected with an ultrafast uni-traveling-carrier photodiode (UTC-PD). A new measurement system, based on the characterization of a microwave reference phase-locked to the 300 GHz signal under test, yields attosecond-level timing noise sensitivity, leveraging conventional technical limitations. This work places DKSs as a leading technology in the mmW and THz-wave field promising breakthroughs in fundamental and civilian applications.