Laurens Breyne

Nokia Bell Labs

The increasing demand for high data rates and low power consumption puts silicon photonics at the edge of its capabilities. The heterogeneous integration of optical ferro-electric materials on silicon enhances the functionality of the silicon on insulator (SOI) platform to meet these demands. Lead zirconate titanate (PZT) thin films with a large Po...

This paper demonstrates how the PIXAPP Photonics Packaging Pilot Line uses its extensive packaging capabilities across its European partner network to design and assemble a highly integrated silicon photonic-based optical transceiver. The processes used are based on PIXAPP's open access packaging design rules or Assembly Design Kit (ADK). The trans...

High-dynamic-range and fast-response burst-mode receivers have become a prerequisite for time-division multiplexed passive optical networks (TDM-PON). Recent progress in high-rate burst-mode receiving technologies optimized for linear operation enables upstream equalization or DSP for future PONs.

A novel method is presented to embed finite-impulse-response filters in slow-wave Mach-Zehnder modulators. This allows to adjust the electro-optic frequency response to the designer's needs. The filter is embedded by adding optical delay lines and optical crossings between phase shifter segments. The position of the delay lines and crossing in the...

Silicon photonics is a key-enabling technology lever-aging decades of effort and infrastructure of the microelectronics CMOS industry resulting in high yield, low cost and potential high volume manufacturing. Furthermore, due to the high index contrast of the platform, very compact, high-complexity photonic integrated circuits can be devised. To be...

We demonstrate an optical transmitter consisting of a limiting SiGe BiCMOS driver co-designed and co-packaged with a silicon photonic segmented traveling-wave Mach-Zehnder modulator (MZM). The MZM is split into two traveling-wave segments to increase the bandwidth and to allow a 2-bit DAC functionality. Two limiting driver channels are used to driv...

We propose a novel implementation of a complex analog equalization filter for the compensation of frequency-dependent variations in coherent optical links. The analog compensation filter can be used in coherent-lite optical communication links where digital signal processing (DSP) is removed to limit the complexity and power consumption. In these l...

The fifth generation (5G) cellular network is expected to include the millimeter wave spectrum, to increase base station density, and to employ higher-order multiple-antenna technologies. The centralized radio access network architectures combined with radio-over-fiber (RoF) links can be the key enabler to improve fronthaul networks. The sigma-delt...

In anticipation of emerging applications such as business services, 5G, and the Internet of Things, research and standardization are working together towards next-generation 25/50 Gbit/s passive optical network access networks. However, the increase in single-channel line rate is limited by the distortion introduced by the low-cost device’s bandwid...

We demonstrate a simple technique to shape the electro-optic frequency response of high-speed TW-MZMs. C-band transmission of 56Gb/s NRZ over 3km SSMF shows 5dB power-penalty improvement at KP4-FEC between a standard and shaped MZM design.

We present a low-power all-digital radio-over-fiber transmitter for beyond 28-GHz using sigma-delta modulation, a 140mW NRZ driver and parallel electro-absorption modulators. 5.25Gb/s (2.625Gb/s) 64-QAM is transported over 10-km SSMF at 1560nm with 7.6% (5.2%) EVM.

We demonstrate real-time C-band transmission of direct detected 28Gb/s NRZ/OOK over 80km SSMF using a Dual-Drive MZM and custom-designed SiGe BiCMOS 5-tap analog FIR filters to compensate chromatic dispersion without digital signal processing.

To achieve the massive device connectivity and high data rate demanded by 5G, wireless transmission with wider signal bandwidths and higher-order multiple-input multiple-output (MIMO) is inevitable. This work demonstrates a possible function split option for the next generation fronthaul interface (NGFI). The proof-of-concept downlink architecture...

We demonstrate (in real-time) electrical dispersion compensation in direct detection links using analog transmit side filtering techniques. By this means, we extend the fiber reach using a low complexity solution while avoiding digital preprocessing and digital-to-analog converters (DACs) which are commonly used nowadays. Modulation is done using a...

We will demonstrate a 2x2 distributed multi-user MIMO transmission using sigma-delta-over-fiber targeting 5G downlink. OFDM signals, sigma-delta modulated and digitally up-converted to 3.5GHz on FPGA, are transmitted over 100-m multi-mode fibers at 850nm using a commercial QSFP-100G-SR4 and wirelessly using in-house developed antennas.

All-digital radio-over-fiber (RoF) transmission has attracted a significant amount of interest in digital-centric systems or centralized networks because it greatly simplifies the front-end hardware by using digital processing. The sigma-delta modulator (SDM)-based all-digital RoF approach pushes the digital signal processing as far as possible int...

This letter presents a linear burst-mode transimpedance amplifier (LBMTIA) capable of receiving 50 Gbit/s 4-level pulse amplitude modulation (PAM-4), targeting upstream transmission in high-rate time division multiplexed passive optical networks (TDM-PONs). Using a digitally controlled high-speed datapath, where offset- and gain are corrected using...

With Radio-Over-Fiber becoming an established technology for the next generation mobile communication networks, interest in integrated microwave photonic circuits is rapidly increasing. Especially photonic frequency converters receive quite some attention as they offer a very large bandwidth and high isolation. In this work, a flexible, integrated...

We present the first real-time 100-GS/s FPGA-based sigma-delta modulator to enable all-digital radio-over-fiber transmission in the 22.75-27.5GHz band. 4.68Gb/s (2.34Gb/s) 64-QAM is transported over 10-km SSMF at 1562nm with 6.46% (4.73%) EVM.

High-speed electro-absorption modulation of a heterogeneously integrated InP-on-Si DFB laser diode is used for the transmission of an 80 Gbps NRZ-OOK signal over 2 km of NZ-DSF link below the hard-decision forward-error-correction threshold.

We demonstrate and analyze 50 Gb/s non-return-to-zero (NRZ) transmission over 15 km of standard single-mode fiber (SSMF), 60 Gb/s NRZ transmission over 5 km of SSMF and up to 64 Gb/s NRZ back-to-back using a directly modulated short-cavity long-wavelength single mode VCSEL emitting at 1326 nm. Owing to an analog 6-tap transmit feedforward equalizer...

We demonstrate a very low-cost low-power solution for a short-reach optical-wireless downlink consisting of sigma-delta radio-over-fiber and a fully passive opto-antenna. An FPGA-based prototype, performing sigma-delta modulation at 7-GS/s and covering a wide frequency band from 3.3 to 3.7 GHz, achieves 218.75 MBd 64-QAM over 200 m OM4 multi-mode f...

A 4-lane proof-of-concept real-time sigma-delta-over-fiber system targeting 5G C-RAN downlink is demonstrated using off-the-shelf components. Per lane, an EVM of 2.67% is achieved for a 3.5 Gbps 256-QAM signal modulated at 3.5 GHz over 20-km single-mode fiber at 1310 nm.

Analog radio-over-fiber transceivers allow a substantial reduction in the complexity of the remote radio heads in the wireless network of the future. In this paper we discuss the building blocks for such a transceiver implemented on a silicon photonics platform, with the heterogeneous integration of III-V devices and the co-integration with electro...

A new high-speed delta-sigma modulator (DSM) topology is proposed by cascading a bit reduction process with a multi-stage noise shaping MASH-1-1 DSM. This process converts the two-bit output sequence of the MASH-1-1 DSM to a single-bit sequence, merely compromising the DSM noise-shaping performance. Furthermore, the high clock frequency requirement...

We demonstrate DSP-free and real-time NRZ transmission at 50Gb/s over 15km SSMF, 60Gb/s over 5km SSMF and 64Gb/s back-to-back using a directly modulated 1326nm short cavity VCSEL supported by a SiGe BiCMOS 6-tap feedforward equalizer.

High-speed optical interconnects require compact, low-power driver electronics for optical modulators. Inverter based CMOS driver circuits show very low power consumption. However, the output swing is typically limited to the supply voltage which is typically insufficient for optical modulators, requiring a cascoded output driver and level shifter....

ATTO targets wireless networking at fiber speed: 100 Gbps/m2 with latencies smaller than 10 $\mu$ s. To provide this tremendous wireless capacity, ultra-small floor-integrated cells are proposed. In this way, short-reach communication can be established, reducing the effect of interference and providing full frequency reuse in the wireless domain....

With the continuously increasing demand of cost effective, broadband wireless access, radio-over-fiber (RoF) starts to gain more and more momentum. Various techniques already exist, using analog (ARoF) or digitized (DRoF) radio signals over fiber. Each with their own advantages and disadvantages. By transmitting a sigma delta modulated signal over...