Highly accurate pulse-per-second timing distribution over optical fibre network using VCSEL side-mode injection

2017 ◽  
Author(s):  
Shukree Wassin ◽  
George M. Isoe ◽  
Romeo R. G. Gamatham ◽  
Andrew W. R. Leitch ◽  
Tim B. Gibbon
Keyword(s):  
Optical Fibre ◽  
Fibre Network ◽  
Side Mode

Polarization effects in KAT-7 telescope optical fibre network: Towards the distribution of frequency and timing references in the MeerKAT telescope

Optik ◽  
2017 ◽  
Vol 138 ◽  
pp. 50-54 ◽  
Author(s):  
E.K. Rotich Kipnoo ◽  
R.R.G. Gamatham ◽  
A.W.R. Leitch ◽  
T.B. Gibbon ◽  
R. Julie ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Polarization Effects ◽  
Fibre Network

Telerobotic surgery project for laparoscopy

Robotica ◽  
1995 ◽  
Vol 13 (4) ◽  
pp. 397-400 ◽  
Author(s):  
Alberto Rovetta ◽  
Remo Sala ◽  
Xia Wen ◽  
Francesca Cosmi ◽  
Arianna Togno ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Invasive Surgery ◽  
Fibre Network ◽  
Telerobotic Surgery

SummaryThis paper deals with the first transatlantic experiment of robotic telesurgery. A robot in Milan (Italy) performed an operation on a model of a pig, and the surgeon controller was in JPL, Pasadena (USA). By means of two communication satellites and of an optical fibre network, the robot performed a biopsy and a preliminary cut for a laparoscopic mini-invasive surgery operation.

scholarly journals Quantum key distribution over a 48 km optical fibre network

2000 ◽  
Vol 47 (2-3) ◽  
pp. 533-547 ◽  
Author(s):  
Richard J. Hughes ◽  
George L. Morgan ◽  
C. Glen Peterson
Keyword(s):  
Optical Fibre ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Fibre Network

scholarly journals Ultrahigh bandwidth data transmission at 44Tb/s over single fibre with a soliton crystal microcomb

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
Optical Fibre ◽  
Data Transmission ◽  
Mode Locking ◽  
Single Fibre ◽  
Full Potential ◽  
Frequency Synthesis ◽  
Communications Networks ◽  
Frequency Combs ◽  
Modulation Format ◽  
Fibre Network

Micro-combs [1-4] - optical frequency combs generated by integrated micro-cavity resonators – offer the full potential of their bulk counterparts [5,6], but in an integrated footprint. The discovery of temporal soliton states (DKS – dissipative Kerr solitons) [4,7-11] as a means of mode-locking micro-combs has enabled breakthroughs in many fields including spectroscopy [12,13], microwave photonics [14], frequency synthesis [15], optical ranging [16,17], quantum sources [18,19], metrology [20,21] and more. One of their most promising applications has been optical fibre communications where they have enabled massively parallel ultrahigh capacity multiplexed data transmission [22,23]. Here, by using a new and powerful class of micro-comb called “soliton crystals” [11], we achieve unprecedented data transmission over standard optical fibre using a single integrated chip source. We demonstrate a line rate of 44.2 Terabits per second (Tb/s) using the telecommunications C-band at 1550nm with a spectral efficiency – a critically important performance metric - of 10.4 bits/s/Hz. Soliton crystals exhibit robust and stable generation and operation as well as a high intrinsic efficiency that, together with a low soliton micro-comb spacing of 48.9 GHz enable the use of a very high coherent data modulation format of 64 QAM (quadrature amplitude modulated). We demonstrate error free transmission over 75 km of standard optical fibre in the laboratory as well as in a field trial over an installed metropolitan optical fibre network. These experiments were greatly aided by the ability of the soliton crystals to operate without stabilization or feedback control. This work demonstrates the capability of optical soliton crystal micro-combs to perform in demanding and practical optical communications networks.

scholarly journals Optical data transmission at 44Tb/s and 10 bits/s/Hz spectral density over standard fibre with a single micro-comb source chip

2020 ◽  
Author(s):  
David Moss ◽  
Roberto Morandotti ◽  
Arnan Mitchell ◽  
xingyuan xu ◽  
Jiayang Wu ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Data Transmission ◽  
Mode Locking ◽  
Optical Data ◽  
Full Potential ◽  
Frequency Synthesis ◽  
Communications Networks ◽  
Frequency Combs ◽  
Modulation Format ◽  
Fibre Network

<p><b>Micro-combs - optical frequency combs generated by integrated micro-cavity resonators – offer the full potential of their bulk counterparts, but in an integrated footprint. The discovery of temporal soliton states (DKS – dissipative Kerr solitons) as a means of mode-locking micro-combs has enabled breakthroughs in many fields including spectroscopy, microwave photonics, frequency synthesis, optical ranging, quantum sources, metrology and more. One of their most promising applications has been optical fibre communications where they have enabled massively parallel ultrahigh capacity multiplexed data transmission. Here,</b><b> by using a new and powerful class of micro-comb called “soliton crystals”, we achieve unprecedented data transmission over standard optical fibre using a single integrated chip source. We demonstrate a line rate of 44.2 Terabits per second (Tb/s) using the telecommunications C-band at 1550nm with a spectral efficiency – a critically important performance metric - of 10.4 bits/s/Hz. Soliton crystals exhibit robust and stable generation and operation as well as a high intrinsic efficiency that, together with a low soliton micro-comb spacing of 48.9 GHz enable the use of a very high coherent data modulation format of 64 QAM (quadrature amplitude modulated). We demonstrate error free transmission over 75 km of standard optical fibre in the laboratory as well as in a field trial over an installed metropolitan optical fibre network. These experiments were greatly aided by the ability of the soliton crystals to operate without stabilization or feedback control. This work demonstrates the capability of optical soliton crystal micro-combs to perform in demanding and practical optical communications networks.</b><br></p>

Spread-spectrum optical fibre network based on pulsed coherent correlation

1990 ◽  
Vol 26 (19) ◽  
pp. 1550 ◽  
Author(s):  
D.D. Sampson ◽  
D.A. Jackson
Keyword(s):  
Optical Fibre ◽  
Spread Spectrum ◽  
Fibre Network

scholarly journals Comparing ultrastable lasers at 7 × 10−17 fractional frequency instability through a 2220 km optical fibre network

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
M. Schioppo ◽  
J. Kronjäger ◽  
A. Silva ◽  
R. Ilieva ◽  
J. W. Paterson ◽  
...  
Keyword(s):  
Optical Fibre ◽  
State Of The Art ◽  
Frequency Instability ◽  
Short Term ◽  
Fundamental Physics ◽  
Fractional Frequency ◽  
Fibre Network ◽  
Optical Frequency Metrology ◽  
Suitable System ◽  
Frequency Metrology

AbstractUltrastable lasers are essential tools in optical frequency metrology enabling unprecedented measurement precision that impacts on fields such as atomic timekeeping, tests of fundamental physics, and geodesy. To characterise an ultrastable laser it needs to be compared with a laser of similar performance, but a suitable system may not be available locally. Here, we report a comparison of two geographically separated lasers, over the longest ever reported metrological optical fibre link network, measuring 2220 km in length, at a state-of-the-art fractional-frequency instability of 7 × 10−17 for averaging times between 30 s and 200 s. The measurements also allow the short-term instability of the complete optical fibre link network to be directly observed without using a loop-back fibre. Based on the characterisation of the noise in the lasers and optical fibre link network over different timescales, we investigate the potential for disseminating ultrastable light to improve the performance of remote optical clocks.

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