Note: Optical fiber two-way time transfer based on single photon counting approach
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00322704" target="_blank" >RIV/68407700:21340/18:00322704 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.5041887" target="_blank" >http://dx.doi.org/10.1063/1.5041887</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5041887" target="_blank" >10.1063/1.5041887</a>
Alternative languages
Result language
angličtina
Original language name
Note: Optical fiber two-way time transfer based on single photon counting approach
Original language description
We are reporting on time transfer parameters of a newly presented method of the Two-Way Time Transfer (TWTT) using the single photon counting approach. The method utilizes two Single Photon Avalanche Diode (SPAD) detectors located on both ends of the optical channel. Each of the SPAD detectors measures the common signal taken from both communication directions on its location. The mixed signal is then mathematically decomposed back to the original, separated signals, whose time shifts are then measured, and the absolute time shift of the two distant time scales is calculated. The photon counting approach was utilized due to its great beneficence for the TWTT as most of the systematic errors can be eliminated, and, additionally, an optical power of only about -100 dBm is necessary for the measurement. It makes the method usable in optical fiber channels with the lengths of more than 500 km without any amplification. The presented TWTT method can be performed for any communication wavelength when proper SPAD detectors are used. In our free-air experiment, we utilized two commonly used multimode small form factor pluggable laser modules and the SPAD detector developed by our group. The long-term timing stability of the SPAD detectors and the timing system used is better than 100 fs. The ultimate precision of the time transfer of less than 1 ps for averaging times of hours was achieved, and the reliability of the new TWTT method was proven.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/8H17019" target="_blank" >8H17019: Research of laser time transfer and SLR technology with picoseconds accuracy and stability</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Review of Scientific Instruments
ISSN
0034-6748
e-ISSN
1089-7623
Volume of the periodical
89
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
3
Pages from-to
—
UT code for WoS article
000443720400099
EID of the result in the Scopus database
2-s2.0-85051540725