| 1. |
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| 2. |
- Liu, Keren, et al.
(author)
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FPGA-based Optical Kerr Effect Emulator
- 2022
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In: Optics InfoBase Conference Papers.
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Conference paper (peer-reviewed)abstract
- We propose a digital emulator of the optical Kerr effect, suitable for FPGA implementation. In addition, we study a combined PMD and Kerr emulator implementation with respect to DSP hardware aspects such as fixed-point performance.
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| 3. |
- Mazur, Mikael, 1990, et al.
(author)
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Continuous Fiber Sensing over Field-Deployed Metro Link using Real-Time Coherent Transceiver and DAS
- 2022
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In: 2022 European Conference on Optical Communication, ECOC 2022. - 9781957171159
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Conference paper (peer-reviewed)abstract
- We use an FPGA-based real-time coherent transceiver prototype with continuous μs-level state-of-polarization readouts and a commercial DAS system to perform fiber sensing. Link monitoring and active detection of link tampering is demonstrated using both systems, showing how SOP-based sensing complements DAS in metro environments.
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| 4. |
- Mazur, Mikael, 1990, et al.
(author)
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Real-Time MIMO Transmission over Field-Deployed Coupled-Core Multi-Core Fibers
- 2022
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In: 2022 Optical Fiber Communications Conference and Exhibition, OFC 2022 - Proceedings. - 9781943580071
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Conference paper (peer-reviewed)abstract
- We perform parallel continuous measurements of deployed SDM fibers using real-time coherent receivers implemented on FPGAs. Fast readouts enabling real-time tracking of the DSP implementation, showing that coupled-core fibers are compatible with real-time DSP implementations.
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| 5. |
- Mazur, Mikael, et al.
(author)
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Real-Time Transmission over 2x55 km All 7-Core Coupled-Core Multi-Core Fiber Link
- 2022
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In: Optical Fiber Communication Conference, OFC 2022. - 9781557524669 - 9781557528209
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Conference paper (peer-reviewed)abstract
- We demonstrate the first transmission experiment using 7-core coupled-core fiber with in-line coupled-core multi-core amplifiers and real-time DSP. The real-time DSP is implemented using a single FPGA that performs MIMO processing across all 7 cores.
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| 6. |
- Mazur, Mikael, 1990, et al.
(author)
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Transoceanic Phase and Polarization Fiber Sensing Using Real-Time Coherent Transceiver
- 2022
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In: Optical Fiber Communication Conference, OFC 2022. - 9781557524669 - 9781557528209
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Conference paper (peer-reviewed)abstract
- We implement a real-time coherent transceiver with fast streaming outputs for environmental sensing. Continuous sensing using phase and equalizer outputs over 12800 km of submarine cable enabled time resolved interferometry in broad spectral range of 10 mHz-1 kHz.
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| 7. |
- Romon Sagredo, Rafael, et al.
(author)
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Waveform Memory for Real-Time FPGA Test of Fiber-Optic Receiver DSPs
- 2022
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In: 2022 IEEE Nordic Circuits and Systems Conference, NORCAS 2022 - Proceedings.
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Conference paper (peer-reviewed)abstract
- Verification of advanced circuit implementations poses many challenges. For complex digital signal processing (DSP) circuits, logic simulations may be prohibitively slow when non-stationary scenarios are considered. A real-time emulation technique like the Fiber-on-Chip (FoC) approach can significantly speed up DSP logic verification. However, a potential weakness with this type of emulation is that it does not use data obtained from experiments, but synthetically creates test data. We introduce a waveform memory, which can be integrated with FoC systems and similar emulators, and which allows measured waveforms to be stored and fed to DSP circuits under test. We perform real-time FPGA experiments where we evaluate a carrier-phase recovery (CPR) module that is tested using either waveform data or synthetic data. Our results for the two different data sets show that the CPR module behaves similarly, both qualitatively and quantitatively, which indicates that the synthetic phase-noise model is a valid replacement of measured data.
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