AI Article Synopsis
- Microresonator solitons are essential for miniaturizing optical frequency combs, which have significant applications in spectroscopy, metrology, and timing.
- The reduction in resonator size allows for high repetition rates up to 1 THz, but detecting these rates is challenging due to limitations in current photodiode and electronic bandwidth.
- The introduction of a dual-comb Vernier frequency division method enables the reduction of the required bandwidth, making it easier to detect microcomb repetition rates and potentially enhancing technologies like optical clocks and microwave photonics.
Article Abstract
Microresonator solitons are critical to miniaturize optical frequency combs to chip scale and have the potential to revolutionize spectroscopy, metrology and timing. With the reduction of resonator diameter, high repetition rates up to 1 THz become possible, and they are advantageous to wavelength multiplexing, coherent sampling, and self-referencing. However, the detection of comb repetition rate, the precursor to all comb-based applications, becomes challenging at these repetition rates due to the limited bandwidth of photodiodes and electronics. Here, we report a dual-comb Vernier frequency division method to vastly reduce the required electrical bandwidth. Free-running 216 GHz "Vernier" solitons sample and divide the main soliton's repetition frequency from 197 GHz to 995 MHz through electrical processing of a pair of low frequency dual-comb beat notes. Our demonstration relaxes the instrumentation requirement for microcomb repetition rate detection, and could be applied for optical clocks, optical frequency division, and microwave photonics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7414884 | PMC |
| http://dx.doi.org/10.1038/s41467-020-17843-9 | DOI Listing |
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