Ultrastable microwave and soliton-pulse generation from fibre-photonic-stabilized microcombs.
Ultrastable microwave and soliton-pulse generation from fibre-photonic-stabilized microcombs.
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DOI：
10.1038/s41467-022-27992-8
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发表时间：
2022-01-19
影响因子：
16.6
通讯作者：
Kim J
中科院分区：
文献类型：
--
作者：
Kwon D;Jeong D;Jeon I;Lee H;Kim J
产生低噪声微波的能力极大地推动了高速、高精度科学和工程领域的发展。微梳具有很高的潜力，可以从芯片级的设备中产生如此低噪音的微波。为了在更宽的傅里叶频率范围和更长的时间范围内实现超低噪声性能，这是许多高精度应用所需的，自由运行的微梳必须锁定到更稳定的参考源。然而，超稳定参考源，特别是基于光学腔的方法，通常体积大、对准敏感且价格昂贵，因此失去了使用芯片级微梳的好处。这里，我们通过将硅微梳(直径几毫米)与基于光纤的定时基准(直径几厘米)相结合来实现紧凑和低相位噪声的微波和孤子脉冲的产生。在1-S范围内，产生了一个超稳定的22 GHz微波，其相位噪声为−110dBc/Hz(−88dBc/Hz)，傅立叶频率为1 kHz(100 Hz)，频率不稳定性为10−13能级。这项工作展示了全封装、手掌大小或更小的系统在产生超稳定孤子脉冲串和微波方面的潜力，从而促进了涉及超高稳定性微梳的广泛领域应用。一种紧凑但高性能的稳定方法一直是微型梳子所缺少的成分。在这里，光纤被用来稳定微梳，使得能够从手掌大小的平台产生超稳定的孤子脉冲和微波
The ability to generate lower-noise microwaves has greatly advanced high-speed, high-precision scientific and engineering fields. Microcombs have high potential for generating such low-noise microwaves from chip-scale devices. To realize an ultralow-noise performance over a wider Fourier frequency range and longer time scale, which is required for many high-precision applications, free-running microcombs must be locked to more stable reference sources. However, ultrastable reference sources, particularly optical cavity-based methods, are generally bulky, alignment-sensitive and expensive, and therefore forfeit the benefits of using chip-scale microcombs. Here, we realize compact and low-phase-noise microwave and soliton pulse generation by combining a silica-microcomb (with few-mm diameter) with a fibre-photonic-based timing reference (with few-cm diameter). An ultrastable 22-GHz microwave is generated with −110 dBc/Hz (−88 dBc/Hz) phase noise at 1-kHz (100-Hz) Fourier frequency and 10−13-level frequency instability within 1-s. This work shows the potential of fully packaged, palm-sized or smaller systems for generating both ultrastable soliton pulse trains and microwaves, thereby facilitating a wide range of field applications involving ultrahigh-stability microcombs. A compact yet high-performance stabilization method has been the missing ingredient for microcombs. Here, optical fibre is used for stabilizing microcombs, enabling the generation of ultrastable soliton pulses and microwaves from palm-sized platforms
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影响因子：
3.6
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