Add to BibSonomy
Abstract
Frequency comb synthesized microwaves have been so far realized with tabletop systems, operated in well-controlled environments. Here, we demonstrate state-of-the-art ultrastable microwave synthesis with a compact rack-mountable apparatus. We present absolute phase noise characterization of a 12 GHz signal using an ultrastable laser at $\sim{194}\;{\rm THz}$ and an Er:fiber comb divider, obtaining $ - {83}\;{\rm dBc/Hz}$ at 1 Hz and $ \lt - {166}\;{\rm dBc/Hz}$ for offsets greater than 5 kHz. Employing semiconductor coating mirrors for the same type of transportable optical frequency reference, we show that $ - {105}\;{\rm dBc/Hz}$ at 1 Hz is supported by demonstrating a residual noise limit of division and detection process of $ - {115}\;{\rm dBc/Hz}$ at 1 Hz. This level of fidelity paves the way for the deployment of ultrastable photonic microwave oscillators and for operating transportable optical clocks.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Tomohiro Tetsumoto, Fumiya Ayano, Mark Yeo, Julian Webber, Tadao Nagatsuma, and Antoine Rolland
Opt. Lett. 45(16) 4377-4380 (2020)
Kemal Şafak, Erwin Cano Vargas, Anan Dai, Marvin Edelmann, Florian Emaury, Karolis Balskus, Benjamin Rudin, Philip Battle, Tony D. Roberts, Bradley Slezak, Todd Hawthorne, and Franz X. Kärtner
Opt. Lett. 49(4) 977-980 (2024)
Peng Li, Zheng Dai, Zhiqiang Fan, Lianshan Yan, and Jianping Yao
Opt. Lett. 45(11) 3139-3142 (2020)