• Corpus ID: 253708197

Automated turnkey microcomb for low-noise microwave synthesis

@inproceedings{Jia2022AutomatedTM,
  title={Automated turnkey microcomb for low-noise microwave synthesis},
  author={Kunpeng Jia and Xinwei Yi and Xiaohan Wang and Yunfeng Liu and Shu-Wei Huang and Xiaoshun Jiang and Wei Liang and Zhenda Xie and Shiqing Zhu},
  year={2022}
}

• Kunpeng Jia, Xinwei Yi, +6 authors Shiqing Zhu
• Published 18 November 2022
• Physics

Microresonator-based optical frequency comb (microcomb) has the potential to revolutionize the accuracy of frequency synthesizer in radar and communication applications. However, fundamental limit exists for low noise microcomb generation, especially in low size, weight, power and cost (SWaP-C) package. Here we resolve such low noise challenge to operate a microcomb close to its low quantum noise limit, in a direct-diode-pump and thus low SWaP-C setup. Such result is triggered by using fiber Fabry-Perot resonators (FFPRs) with high quality factors up to 4.0×10 9 . Automated turnkey operation has been achieved within a compact setup size of 85 mm × 90 mm × 25 mm. Low phase noise of −80 and −105 dBc/Hz at 100 Hz, −106 and −125 dBc/Hz at 1 kHz, −133 and −148 dBc/Hz at 10 kHz is achieved at 10.1 GHz and 1.7 GHz repetition frequencies, respectively. Our result paves the way for the microcomb to be a low-noise frequency synthesizer with low SWaP-C and thus field deployability.