Towards high-power, high-coherence, integrated photonic mmWave platform with microcavity solitons
arXiv:2009.11918 · doi:10.1038/s41377-020-00445-x
Abstract
Millimeter-wave (mmWave) technology continues to draw large interest due to its broad applications in wireless communications, radar, and spectroscopy. Compared to pure electronic solutions, photonic-based mmWave generation provides wide bandwidth, low power dissipation, and remoting through low-loss fiber. However, at high frequencies, two major challenges exist for the photonic system: the power roll-off of the photodiode, and the large signal linewidth derived directly from the lasers. Here, we demonstrate a new photonic mmWave platform by combining integrated microresonator solitons and high-speed photodiodes to address the challenges in both power and coherence. The solitons, being inherently mode-locked, are measured to provide 5.8 dB additional gain through constructive interference among mmWave beatnotes, and the absolute mmWave power approaches the theoretical limit of conventional heterodyne detection at 100 GHz. In our free-running system, the soliton is capable of reducing the mmWave linewidth by two orders of magnitude from that of the pump laser. Our work leverages microresonator solitons and high-speed modified uni-traveling carrier photodiodes to provide a viable path to chip-scale high-power, low-noise, high-frequency sources for mmWave applications.
arXiv comment9 pages, 5 figures
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- Contrasting the relative performance of RF photonic transversal signal processors based on microcombs using discrete components versus integrated devices
- Effects of a quiet point on a Kerr microresonator frequency comb
- Universal Kerr-thermal dynamics of self-injection-locked microresonator dark pulses
- Structured Light Modal Interface via Liquid-Crystal Planar Optics