Marco Eppenberger
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View article: Ring-assisted, racetrack, and Mach-Zehnder modulator: which one offers the lowest voltages and chirp-free operation?
Ring-assisted, racetrack, and Mach-Zehnder modulator: which one offers the lowest voltages and chirp-free operation? Open
This study presents a comparison between resonant and non-resonant electro-optical modulator configurations. The focus lies on finding the configuration with the highest modulation amplitude at the lowest drive voltage while achieving a la…
View article: Pockels Coefficients in Thin-Film Barium Titanate and Lithium Niobate up to 300 GHz
Pockels Coefficients in Thin-Film Barium Titanate and Lithium Niobate up to 300 GHz Open
The Pockels coefficients in thin-film barium titanate (BTO) and lithium niobate (LN) have been measured for modulating frequencies up to 300 GHz. BTO’s effective nonlinearity is ~10 times larger than LN’s with a small frequency dependence.
View article: Reducing Training Time of Deep Learning Based Digital Backpropagation by Stacking
Reducing Training Time of Deep Learning Based Digital Backpropagation by Stacking Open
A method for reducing the training time of a deep learning based digital backpropagation (DL-DBP) is presented. The method is based on dividing a link into smaller sections. A smaller section is then compensated by the DL-DBP algorithm and…
View article: Plasmonic devices for transparent radio-over-fiber networks
Plasmonic devices for transparent radio-over-fiber networks Open
ISSN:0277-786X
View article: Transparent Optical-THz-Optical Link at 240/192 Gbit/s Over 5/115 m Enabled by Plasmonics
Transparent Optical-THz-Optical Link at 240/192 Gbit/s Over 5/115 m Enabled by Plasmonics Open
A transparent Optical-subTHz-Optical link providing record-high single line rates of 240 Gbit/s and 192 Gbit/s on a single optical carrier over distances from 5 to 115 m is demonstrated. Besides a direct mapping of the optical to a 230 GHz…
View article: Efficient Polarization-Insensitive O-Band Grating Couplers for Silicon Nitride
Efficient Polarization-Insensitive O-Band Grating Couplers for Silicon Nitride Open
We introduce efficient polarization-insensitive SiN O-band grating coupler relying on a simple fabrication procedure. It's an essential but missing building block in photonics and needed, for example, to realize detectors for light with un…
View article: Enhanced Stability of Resonant Racetrack Plasmonic-Organic-Hybrid Modulators
Enhanced Stability of Resonant Racetrack Plasmonic-Organic-Hybrid Modulators Open
A high-speed and compact plasmonic organic racetrack modulator is shown to be orders of magnitude more robust against operating condition changes compared to resonant modulators based on the plasma dispersion effect while maintaining therm…
View article: Plasmonic Racetrack Modulator Transmitting 220 Gbit/s OOK and 408 Gbit/s 8PAM
Plasmonic Racetrack Modulator Transmitting 220 Gbit/s OOK and 408 Gbit/s 8PAM Open
OOK line rates of 220 Gbit/s and 408 Gbit/s 8PAM and transmission over 100 m are demonstrated with a resonant plasmonic racetrack modulator. The device requires low 0.6 Vp driver voltages, offers a bandwidth >110 GHz and on-chip losses of …
View article: Compact Optical TX and RX Macros for Computercom Monolithically Integrated in 45 nm CMOS
Compact Optical TX and RX Macros for Computercom Monolithically Integrated in 45 nm CMOS Open
As the reach of optical communications continues to shrink, photonics is moving from rack-to-rack datacom links to centimeter-scale in-computer applications (computercom) where different architectures are needed. Integrated optical microri…
View article: 10Gb/s Intra-Chip Compact Electro-Optical Interconnect
10Gb/s Intra-Chip Compact Electro-Optical Interconnect Open
We demonstrate a digital-to-optical-to-digital link operating at 10 Gb/s with 2.4 pJ/b below 10-9 BER enabled by zero-change CMOS macros. All necessary electronic-photonic circuits are contained within 0.015 mm2 of silicon area.
View article: Broadband Metallic Fiber-to-Chip Couplers and a Low-Complexity Integrated Plasmonic Platform
Broadband Metallic Fiber-to-Chip Couplers and a Low-Complexity Integrated Plasmonic Platform Open
We present a plasmonic platform featuring efficient, broadband metallic fiber-to-chip couplers that directly interface plasmonic slot waveguides, such as compact and high-speed electro-optic modulators. The metallic gratings exhibit an exp…
View article: 100 Gbit/s NRZ Data Modulation in Plasmonic Racetrack Modulators on the Silicon Photonic Platform
100 Gbit/s NRZ Data Modulation in Plasmonic Racetrack Modulators on the Silicon Photonic Platform Open
Low power broadband plasmonic silicon-photonic racetrack modulators are introduced. 100 Gbit/s NRZ-OOK and 100 Gbit/s 4-PAM direct detection is demonstrated. The devices feature a bandwidth of 50 GHz, operate with 1.3 V p and are of intere…
View article: Deep learning based digital backpropagation demonstrating SNR gain at low complexity in a 1200 km transmission link
Deep learning based digital backpropagation demonstrating SNR gain at low complexity in a 1200 km transmission link Open
A deep learning (DL) based digital backpropagation (DBP) method with a 1 dB SNR gain over a conventional 1 step per span DBP is demonstrated in a 32 GBd 16QAM transmission across 1200 km. The new DL-DPB is shown to require 6 times less com…
View article: Low-Complexity Real-Time Receiver for Coherent Nyquist-FDM Signals
Low-Complexity Real-Time Receiver for Coherent Nyquist-FDM Signals Open
We propose and demonstrate a new low-complexity hardware architecture and digital signal processing (DSP) implementation for coherent reception of Nyquist frequency division multiplexed (Nyquist-FDM, digital subcarrier multiplexing) signal…
View article: 16 Gb/s microring-to-microring photonic link in 45 nm monolithic zero-change CMOS
16 Gb/s microring-to-microring photonic link in 45 nm monolithic zero-change CMOS Open
We show a two-fold data-rate improvement for chip-to-chip links in the 45nm node. Both modulator and photodiode consist of microring resonators (MRRs). At the relevant working point, the MRR photodiode shows a ten-fold bandwidth increase.
View article: Multi-format carrier recovery for coherent real-time reception with processing in polar coordinates
Multi-format carrier recovery for coherent real-time reception with processing in polar coordinates Open
A blind frequency and phase search algorithm for joint frequency and phase recovery is introduced. The algorithm achieves low complexity due to processing in polar coordinates, which reduces the amount of multiplications. We show an implem…