Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Swann, William C."'
Autor:
Caldwell, Emily D., Deschenes, Jean-Daniel, Ellis, Jennifer, Swann, William C., Stuhl, Benjamin K., Bergeron, Hugo, Newbury, Nathan R., Sinclair, Laura C.
The combination of optical time transfer and optical clocks opens up the possibility of large-scale free-space networks that connect both ground-based optical clocks and future space-based optical clocks. Such networks promise better tests of general
Externí odkaz:
http://arxiv.org/abs/2212.12541
Autor:
Bodine, Martha I., Deschênes, Jean-Daniel, Khader, Isaac H., Swann, William C., Leopardi, Holly, Beloy, Kyle, Bothwell, Tobias, Brewer, Samuel M., Bromley, Sarah L., Chen, Jwo-Sy, Diddams, Scott A., Fasano, Robert J., Fortier, Tara M., Hassan, Youssef S., Hume, David B., Kedar, Dhruv, Kennedy, Colin J., Koepke, Amanda, Leibrandt, David R., Ludlow, Andrew D., McGrew, William F., Milner, William R., Nicolodi, Daniele, Oelker, Eric, Parker, Thomas E., Robinson, John M., Romish, Stefania, Schäffer, Stefan A., Sherman, Jeffrey A., Sonderhouse, Lindsay, Yao, Jian, Ye, Jun, Zhang, Xiaogang, Newbury, Nathan R., Sinclair, Laura C.
Publikováno v:
Phys. Rev. Research 2, 033395 (2020)
We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5 km open-air link. Our free-space measurement is
Externí odkaz:
http://arxiv.org/abs/2006.01306
Autor:
Network, Boulder Atomic Clock Optical, Collaboration, Beloy, Kyle, Bodine, Martha I., Bothwell, Tobias, Brewer, Samuel M., Bromley, Sarah L., Chen, Jwo-Sy, Deschênes, Jean-Daniel, Diddams, Scott A., Fasano, Robert J., Fortier, Tara M., Hassan, Youssef S., Hume, David B., Kedar, Dhruv, Kennedy, Colin J., Khader, Isaac, Koepke, Amanda, Leibrandt, David R., Leopardi, Holly, Ludlow, Andrew D., McGrew, William F., Milner, William R., Newbury, Nathan R., Nicolodi, Daniele, Oelker, Eric, Parker, Thomas E., Robinson, John M., Romisch, Stefania, Schäffer, Stefan A., Sherman, Jeffrey A., Sinclair, Laura C., Sonderhouse, Lindsay, Swann, William C., Yao, Jian, Ye, Jun, Zhang, Xiaogang
Atomic clocks occupy a unique position in measurement science, exhibiting higher accuracy than any other measurement standard and underpinning six out of seven base units in the SI system. By exploiting higher resonance frequencies, optical atomic cl
Externí odkaz:
http://arxiv.org/abs/2005.14694
Autor:
Bergeron, Hugo, Sinclair, Laura C., Swann, William C., Khader, Isaac, Cossel, Kevin C., Cermak, Michael, Deschênes, Jean-Daniel, Newbury, Nathan R.
Future optical clock networks will require free-space optical time-frequency transfer between flying clocks. However, simple one-way or standard two-way time transfer between flying clocks will completely break down because of the time-of-flight vari
Externí odkaz:
http://arxiv.org/abs/1808.07870
Autor:
Sinclair, Laura C., Bergeron, Hugo, Swann, William C., Khader, Isaac, Cossel, Kevin C., Cermak, Michael, Newbury, Nathan R., Deschênes, Jean-Daniel
Publikováno v:
Phys. Rev. A 99, 023844 (2019)
Platform motion poses significant challenges to high-precision optical time and frequency transfer. We give a detailed description of these challenges and their solutions in comb-based optical two-way time and frequency transfer (O-TWTFT). Specifical
Externí odkaz:
http://arxiv.org/abs/1808.07040
Autor:
Khader, Isaac, Bergeron, Hugo, Sinclair, Laura C., Swann, William C., Newbury, Nathan R., Deschênes, Jean-Daniel
Free space optical (FSO) communication channels are typically used to transmit high-speed data between sites over the air. Here we repurpose an FSO digital communication system and use it directly for two-way time transfer. We demonstrate real-time s
Externí odkaz:
http://arxiv.org/abs/1808.06710
Autor:
Sinclair, Laura C., Bergeron, Hugo, Swann, William C., Baumann, Esther, Deschênes, Jean-Daniel, Newbury, Nathan R.
Publikováno v:
Phys. Rev. Lett. 120, 050801 (2018)
We demonstrate carrier-phase optical two-way time-frequency transfer (carrier-phase OTWTFT) through the two-way exchange of frequency comb pulses. Carrier-phase OTWTFT achieves frequency comparisons with a residual instability of 1.2x10$^{-17}$ at 1
Externí odkaz:
http://arxiv.org/abs/1710.04063
Autor:
Truong, Gar-Wing, Waxman, Eleanor M., Cossel, Kevin C., Baumann, Esther, Klose, Andrew, Giorgetta, Fabrizio R., Swann, William C., Newbury, Nathan R., Coddington, Ian
A fieldable dual-comb spectrometer is described based on a "bootstrapped" frequency referencing scheme in which short-term optical phase coherence between combs is attained by referencing each to a free-running diode laser, whilst high frequency reso
Externí odkaz:
http://arxiv.org/abs/1612.00055
Autor:
Deschenes, Jean-Daniel, Sinclair, Laura C., Giorgetta, Fabrizio R., Swann, William C., Baumann, Esther, Bergeron, Hugo, Cermak, Michael, Coddington, Ian, Newbury, Nathan R.
Publikováno v:
Phys. Rev. X 6, 021016 (2016)
The use of optical clocks/oscillators in future ultra-precise navigation, gravitational sensing, coherent arrays, and relativity experiments will require time comparison and synchronization over terrestrial or satellite free-space links. Here we demo
Externí odkaz:
http://arxiv.org/abs/1509.07888
Autor:
Rieker, Gregory B., Giorgetta, Fabrizio R., Swann, William C., Kofler, Jon, Zolot, Alex M., Sinclair, Laura C., Baumann, Esther, Cromer, Christopher, Petron, Gabrielle, Sweeney, Colm, Tans, Pieter P., Coddington, Ian, Newbury, Nathan R.
We demonstrate coherent dual frequency-comb spectroscopy for detecting variations in greenhouse gases. High signal-to-noise spectra are acquired spanning 5990 to 6260 cm^-1 (1600 to 1670 nm) covering ~700 absorption features from CO2, CH4, H2O, HDO,
Externí odkaz:
http://arxiv.org/abs/1406.3326