| 1. |
- Puttnam, Benjamin, et al.
(författare)
-
High Capacity Transmission Systems Using Homogeneous Multi-Core Fibers [Invited]
- 2017
-
Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 35:6, s. 1157-1167
-
Tidskriftsartikel (refereegranskat)abstract
- We discuss optical transmission using homogeneous, single-mode, multicore fibers. We first describe the key fiber properties that can affect transmission, such as intercore crosstalk and the variation of propagation delay between cores, and the consequences of these properties on spatial super-channel transmission. We then describe a series of experiments and demonstrations of system features including self-homodyne detection and joint spatial superchannel modulation before discussing their suitability to high-capacity transmission.
|
|
| 2. |
- Agrell, Erik, 1965, et al.
(författare)
-
Modulation and detection for multicore superchannels with correlated phase noise [Invited]
- 2018
-
Ingår i: 2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings. ; Part F94-CLEO_SI 2018
-
Konferensbidrag (refereegranskat)abstract
- SDM fibers offer new opportunities and challenges for joint transmitter and receiver processing. We review multidimensional modulation and detection theory, describe algorithms for phase tracking and detection over spatial superchannels, and present some experimental results.
|
|
| 3. |
|
|
| 4. |
- Eriksson, Tobias A., et al.
(författare)
-
Digital self-coherent continuous variable quantum key distribution system
- 2020
-
Ingår i: Optics InfoBase Conference Papers. - : Optica Publishing Group.
-
Konferensbidrag (refereegranskat)abstract
- We investigate a continuous variable quantum key distribution system with digital tracking of both polarization and phase. Stable operation over 25km for 36 hours with secret key rates between 1.9 and 2.8 Mbit/s is demonstrated.
|
|
| 5. |
- Luis, R. S., et al.
(författare)
-
Demonstration of a 1 Pb/s spatial channel network node
- 2019
-
Ingår i: IET Conference Publications. - : Institution of Engineering and Technology.
-
Konferensbidrag (refereegranskat)abstract
- We experimentally demonstrate a petabit-class hierarchical SDM switching node with granularity from 10 Tb/s to 1 Pb/s. We address spatial bypassing network scenarios, optical channel grooming, spatial multiplex section protection switching, and optical channels using coupled and uncoupled spatial channels.
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
- Luis, R. S., et al.
(författare)
-
Spectral efficiency limits in crosstalk-impaired multi-core fiber links
- 2018
-
Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. ; 10551
-
Konferensbidrag (refereegranskat)abstract
- Downloading of the abstract is permitted for personal use only. We review the latest advances on ultra-high throughput transmission using crosstalk-limited single-mode multicore fibers and compare these with the theoretical spectral efficiency of such systems. We relate the crosstalkimposed spectral efficiency limits with fiber parameters, such as core diameter, core pitch, and trench design. Furthermore, we investigate the potential of techniques such as direction interleaving and high-order MIMO to improve the throughput or reach of these systems when using various modulation formats.
|
|
| 9. |
- Puttnam, Benjamin, et al.
(författare)
-
High-capacity MCF transmission with wideband comb
- 2017
-
Ingår i: Optics InfoBase Conference Papers. - 2162-2701. ; Part F40-OFC 2017, s. M2J.4-
-
Konferensbidrag (refereegranskat)abstract
- We describe experiments combining high core-count, homogeneous single-mode multicore fibers with a wideband comb for high-capacity transmission without high-order MIMO reception and demonstrate wideband transmission with coded modulation up to 12,300 km.
|
|
| 10. |
|
|
| 11. |
- Puttnam, B. J., et al.
(författare)
-
0.715 Pb/s transmission over 2,009.6 km in 19-core cladding pumped EDFA amplified MCF link
- 2019
-
Ingår i: Optics InfoBase Conference Papers. - : OSA - The Optical Society. - 9781943580538
-
Konferensbidrag (refereegranskat)abstract
- We demonstrate 0.715 Pb/s recirculating transmission through 19 cores of 31.4 km MCF amplified with C+L-band, cladding-pumped, multi-core EDFAs; transmitting 345×24.5 GBd PDM-16QAM signals over 2009.6 km for 1.44 Exb/s×km throughput-distance product.
|
|
| 12. |
- Puttnam, B J, et al.
(författare)
-
8007 km C + L band transmission over MCF with 19-core cladding-pumped EDFA
- 2019
-
Ingår i: 45th European Conference on Optical Communication, ECOC 2019. - : Institution of Engineering and Technology (IET).
-
Konferensbidrag (refereegranskat)abstract
- We investigate an MCF link using a C+L-band, 19-core, cladding-pumped EDFA over trans-oceanic distances measuring a fully decoded throughput of 18.6 Tb/s and 14.5 Tb/s at a distance of 8007 km for an inner and outer-ring cores respectively.
|
|
| 13. |
- Puttnam, Benjamin J., et al.
(författare)
-
Characteristics of homogeneous multi-core fibers for SDM transmission
- 2019
-
Ingår i: APL Photonics. - : AIP Publishing. - 2378-0967. ; 4:2
-
Tidskriftsartikel (refereegranskat)abstract
- We describe optical data transmission systems using homogeneous, single-mode, multi-core fibers (MCFs). We first briefly discuss space-division multiplexing (SDM) fibers, observing that no individual SDM fiber offers overwhelming advantages over bundles of single-mode fiber (SMF) across all transmission regimes. We note that for early adoption of SDM fibers, uncoupled or weakly coupled fibers which are compatible with existing SDM infrastructure have a practical advantage. Yet, to be more attractive than parallel SMF, it is also necessary to demonstrate benefits beyond improved spatial spectral efficiency. It is hoped that the lower spread of propagation delays (skew) between spatial channels in some fibers can be exploited for improved performance and greater efficiency from hardware sharing and joint processing. However, whether these benefits can be practically harnessed and outweigh impairments or effort to mitigate cross talk between spatial channels is not yet clear. Hence, focusing on homogeneous MCFs, we first describe measurements and simulations on the impact of inter-core cross talk in such fibers before reporting experimental investigation into the spatial channel skew variation with a series of the experimental results including a comparison with SMF in varying environmental conditions. Finally, we present some system and transmission experiments using parallel recirculating loops that enable demonstration of both multi-dimensional modulation and joint digital processing techniques across three MCF cores. Both techniques lead to increased transmission reach but highlight the need for further experimental analysis to properly characterize the potential benefits of correlated propagation delays in such fibers.
|
|
| 14. |
- Puttnam, B. J., et al.
(författare)
-
High Data-Rate and Long Distance MCF Transmission with 19-Core C+L band Cladding-Pumped EDFA
- 2020
-
Ingår i: Journal of Lightwave Technology. - : Institute of Electrical and Electronics Engineers Inc.. - 0733-8724 .- 1558-2213. ; 38:1, s. 123-130
-
Tidskriftsartikel (refereegranskat)abstract
- We describe a series of optical transmission experiments based around single-mode, multi-core fiber (MCF) amplified with 19-core, C+L band erbium-doped fiber amplifier (EDFA). The cladding-pumped amplifier uses two multi-mode pumps in each of C and L band to provide gain bandwidth over more than 75 nm. For recirculating transmission of PDM-16QAM signals on 345 wavelength carriers between 1530.52 nm and 1605.52 nm, we measure 0.715 Pb/s transmission over a distance of 2009 km (64 recirculations), equivalent to a throughput-distance product of 1.44 exabit/s x km. Next, using PDM-QPSK modulation, we investigate trans-oceanic transmission distances, measuring throughputs of 18.6 Tb/s and 14.5 Tb/s in 2 cores after 255 recirculations, a distance of 8007 km. Further, we evaluate the combined EDFA and fiber crosstalk penalties showing a core and wavelength dependence in agreement with previous MCF crosstalk measurements. These results demonstrate the potential of high core-count EDFAs to combine both high capacity transmission over transoceanic distances with benefits of SDM integration.
|
|
| 15. |
- Puttnam, B. J., et al.
(författare)
-
Transmission and Crosstalk Measurements in MC-EDFA amplified 19-core link
- 2019
-
Ingår i: OECC/PSC 2019 - 24th OptoElectronics and Communications Conference/International Conference Photonics in Switching and Computing 2019. - : Institute of Electrical and Electronics Engineers (IEEE).
-
Konferensbidrag (refereegranskat)abstract
- We investigate long-haul, wideband transmission of PDM-QPSK and PDM 16-QAM in an MCF link amplified in a C+L-band,19-core cladding pumped EDFA and measure a combined fiber/EDFA crosstalk penalty of 14% for lone-wavelenetli L-band channel.
|
|
| 16. |
- Rademacher, G., et al.
(författare)
-
10.66 Peta-Bit/s Transmission over a 38-Core-Three-Mode Fiber
- 2020
-
Ingår i: 2020 Optical Fiber Communications Conference and Exhibition, OFC 2020 - Proceedings. - : Institute of Electrical and Electronics Engineers Inc..
-
Konferensbidrag (refereegranskat)abstract
- We demonstrate transmission of 368-WDM-38-core-3-mode × 24.5-GBaud 64- and 256-QAM signals over 13 km. Record data-rate and spectral-efficiency of 1158.7 b/s/Hz were enabled by a low DMD 38-core-3-mode fiber with high uniformity amongst cores.
|
|
| 17. |
- Rademacher, G., et al.
(författare)
-
Experimental investigation of a 16-dimensional modulation format for long-haul multi-core fiber transmission
- 2015
-
Ingår i: 41st European Conference on Optical Communication, ECOC 2015, Valencia, Spain, 27 September - 1 October 2015. - 9788460817413
-
Konferensbidrag (refereegranskat)abstract
- We experimentally investigate a 16-dimensional modulation format applicable to multi-core fiber transmission, and demonstrate over 14,000 km transmission for a BER of 1E-3, a 55 % improvement in reach compared to DP-BPSK for the same spectral efficiency.
|
|
| 18. |
- Rademacher, G., et al.
(författare)
-
High capacity transmission with few-mode fibers
- 2019
-
Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 37:2, s. 425-432
-
Tidskriftsartikel (refereegranskat)abstract
- We experimentally investigate high-capacity few-mode fiber transmission for short and medium-haul optical links. In separate experiments, we demonstrate C + L band transmission of 283 Tbit/s over a single 30 km span and recirculating loop transmission of 159 Tbit/s over 1045 km graded-index three mode fiber. The first experiment reached a data-rate per fiber mode within 90% of the record data-rates reported in the same transmission bands for single-mode fibers. The second experiment demonstrated the feasibility of reaching high data-rates over long distance few-mode fiber transmission, despite strong impairments due to mode-dependent loss and differential mode delay.
|
|
| 19. |
|
|
