| 1. |
- Mazur, Mikael, 1990, et al.
(författare)
-
Field Trial of FPGA-Based Real-Time Sensing Transceiver over 524km of Live Aerial Fiber
- 2023
-
Ingår i: Optical Fiber Communication Conference, OFC 2023. - 9781957171180
-
Konferensbidrag (refereegranskat)abstract
- We perform fiber sensing over a 524 km live network using a real-time coherent transceiver prototype. Polarization and length changes from the link consisting exclusively of aerial fiber wound around high-voltage power cables are continuously monitored.
|
|
| 2. |
- Mazur, Mikael, 1990, et al.
(författare)
-
Real-Time Monitoring of Cable Break in a Live Network using a Coherent Transceiver Prototype
- 2024
-
Ingår i: Optical Fiber Communication Conference, OFC 2024. - 9781957171326
-
Konferensbidrag (refereegranskat)abstract
- We monitor a 524-km live network link using an real-time FPGA-based sensing-capable transceiver prototype during a human-caused cable break. Polarization sensing data shows minute-level potential break warning precursors, offering outage mitigation prospects.
|
|
| 3. |
- Kolltveit, Erling, et al.
(författare)
-
Single-wavelength 40 Gbit/s soliton field transmission experiment over 400 km of installed fibre
- 1999
-
Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 1350-911X .- 0013-5194. ; 35:1, s. 75-76
-
Tidskriftsartikel (refereegranskat)abstract
- 40Gbit/s soliton transmission over 400km (57km amplifier spacing) of installed lines without in-line control has been achieved. The maximum transmission penalties for parallel polarised and polarisation division multiplexed soliton transmission were ∼4 and 1dB, respectively. The transmission distance is the longest ever reported for a field trial with a single wavelength bit rate > 20Gbit/s for any optical transmission format. The polarisation mode dispersion was numerically found to completely dominate the system performance.
|
|
| 4. |
- Alijagic, Andi, 1992-, et al.
(författare)
-
Particle Safety Assessment in Additive Manufacturing : From Exposure Risks to Advanced Toxicology Testing.
- 2022
-
Ingår i: Frontiers in Toxicology. - : Frontiers Media S.A.. - 2673-3080. ; 4
-
Forskningsöversikt (refereegranskat)abstract
- Additive manufacturing (AM) or industrial three-dimensional (3D) printing drives a new spectrum of design and production possibilities; pushing the boundaries both in the application by production of sophisticated products as well as the development of next-generation materials. AM technologies apply a diversity of feedstocks, including plastic, metallic, and ceramic particle powders with distinct size, shape, and surface chemistry. In addition, powders are often reused, which may change the particles' physicochemical properties and by that alter their toxic potential. The AM production technology commonly relies on a laser or electron beam to selectively melt or sinter particle powders. Large energy input on feedstock powders generates several byproducts, including varying amounts of virgin microparticles, nanoparticles, spatter, and volatile chemicals that are emitted in the working environment; throughout the production and processing phases. The micro and nanoscale size may enable particles to interact with and to cross biological barriers, which could, in turn, give rise to unexpected adverse outcomes, including inflammation, oxidative stress, activation of signaling pathways, genotoxicity, and carcinogenicity. Another important aspect of AM-associated risks is emission/leakage of mono- and oligomers due to polymer breakdown and high temperature transformation of chemicals from polymeric particles, both during production, use, and in vivo, including in target cells. These chemicals are potential inducers of direct toxicity, genotoxicity, and endocrine disruption. Nevertheless, understanding whether AM particle powders and their byproducts may exert adverse effects in humans is largely lacking and urges comprehensive safety assessment across the entire AM lifecycle-spanning from virgin and reused to airborne particles. Therefore, this review will detail: 1) brief overview of the AM feedstock powders, impact of reuse on particle physicochemical properties, main exposure pathways and protective measures in AM industry, 2) role of particle biological identity and key toxicological endpoints in the particle safety assessment, and 3) next-generation toxicology approaches in nanosafety for safety assessment in AM. Altogether, the proposed testing approach will enable a deeper understanding of existing and emerging particle and chemical safety challenges and provide a strategy for the development of cutting-edge methodologies for hazard identification and risk assessment in the AM industry.
|
|
| 5. |
- Brentel, Jonas, et al.
(författare)
-
Single-wavelength 40 Gb/s soliton field transmission experiments over 400 km fibre without in-line control
- 1999
-
Ingår i: OFC/IOOC 1999 - Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communication. - 155752582X ; 3, s. 121-124
-
Konferensbidrag (refereegranskat)abstract
- We report single-wavelength 40-Gbit/s soliton transmission over 400-km installed fiber lines in Sweden. Both polarization-division multiplexed and parallel solitons were transmitted. The system performance is dominated by the polarization-mode dispersion.
|
|
| 6. |
- Sheikh, Alireza, 1989, et al.
(författare)
-
Dispersion Compensation Filter Design Optimized for Robustness and Power Efficiency
- 2015
-
Ingår i: Signal Processing in Photonics Communications, SPPCom 2015; Boston, MA; United States; 27 June 2015 through 1 July 2015. - 9781557520005 ; , s. SpT3D.2-
-
Konferensbidrag (refereegranskat)abstract
- We present an optimized CD compensation filter with improved performance and increased resilience to quantization errors. The filter is given in closed form based on a constrained least-squares problem.
|
|
| 7. |
- Börjeson, Erik, 1984, et al.
(författare)
-
Circuit Implementation of Pilot-Based Dynamic MIMO Equalization for Coupled-Core Fibers
- 2024
-
Ingår i: Optical Fiber Communication Conference, OFC 2024. - 9781957171326
-
Konferensbidrag (refereegranskat)abstract
- We explore ASIC implementation for pilot-based MIMO equalizers for coupled-core transmission, considering chip area scaling trends and performance impact of time-dependent drift. For a system with 28-GBd subcarriers, an equalizer for 8 × 8 is 5.3 times larger than for 2 × 2.
|
|
| 8. |
- Fougstedt, Christoffer, 1990, et al.
(författare)
-
ASIC Implementation of Time-Domain Digital Back Propagation for Coherent Receivers
- 2018
-
Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 30:13, s. 1179-1182
-
Tidskriftsartikel (refereegranskat)abstract
- Digital back propagation (DBP) is often proposed and implemented offline for the mitigation of nonlinear impairments in long-haul fiber communications. However, complexity in terms of chip area and power consumption in a realistic application-specific integrated circuit implementation is yet to be determined. Here, we implement time-domain DBP (TD-DBP) in a 28-nm fully-depleted silicon-on-insulator process technology, considering digital implementation aspects such as limited-resolution arithmetic and finite-length filters. We choose as example a coherent optical transmission system, viz. a single-channel, single-polarization, and 20-GBd 16-QAM system, for which the DBP is known to perform well. For the considered system, we find that the TD-DBP can enable a reach increase from 3400 to 5300 km, at a power dissipation of <20 W (or, conversely, an energy dissipation of <230 pJ/bit), at a pre-FEC BER of 10-2.
|
|
| 9. |
- Lundberg, Lars, 1989, et al.
(författare)
-
Power Consumption of a Minimal-DSP Coherent Link with a Polarization Multiplexed Pilot-Tone
- 2016
-
Ingår i: 42nd European Conference and Exhibition on Optical Communications, September 18-22, 2016, Düsseldorf. - 9783800742745
-
Konferensbidrag (refereegranskat)abstract
- We experimentally study the trade-off between performance and DSP power consumption. While minimal DSP allows transmission of 16QAM at 5 GBaud, the symbol rate can be increased if anextra equalizer is added, leading to energy savings in optical components.
|
|
| 10. |
- Lundberg, Lars, 1989, et al.
(författare)
-
Power Consumption Savings Through Joint Carrier Recovery for Spectral and Spatial Superchannels
- 2018
-
Ingår i: European Conference on Optical Communication, ECOC. ; 2018-September
-
Konferensbidrag (refereegranskat)abstract
- The power consumption of a circuit implementation of a master-slave carrier recovery scheme is studied. Slave power consumption is 27% of master power for 16QAM and 13% for 64QAM, enabling power savings approaching 0.7W per channel through joint processing.
|
|
