Silicon Differential Receiver With Zero-Biased Balanced Detection for Access Networks

[EN] We present an optimized differential receiver in silicon with a minimized footprint and balanced zero-biased Ge photodiodes. The receiver integrates a delay-line with a 2 ¿ 4 multimode interferometer 90° hybrid and two balanced photodiodes for differential quadrature phase-shift keying demodulation. Two receivers are tested, for 10 and 20 Gb/s operation, and well opened eye-diagrams and symbol constellations are obtained with error vector magnitude values as low as 12.5% and 19.57%, respectively. The results confirm the potential of integrated silicon receivers to become key building blocks for future passive optical access networks based on advanced modulation formats. © 1989-2012 IEEE.This work was supported in part by the European Community’s Seventh Framework Program under Grant 224312 HELIOS.Aamer, M.; Sotiropoulos, N.; Brimont, ACJ.; Fedeli, J.; Marris-Morini, D.; Cassan, E.; Vivien, L.... (2013). Silicon Differential Receiver With Zero-Biased Balanced Detection for Access Networks. IEEE Photonics Technology Letters. 25(13):1207-1210. https://doi.org/10.1109/LPT.2013.2262931S12071210251

Optimization of H2 thermal annealing process for the fabrication of ultra-low loss sub-micron silicon-on-insulator rib waveguides

International audienc

Optimization of H2 thermal annealing process for the fabrication of ultra-low loss sub-micron silicon-on-insulator rib waveguides

International audienc

A device library for the ultra-low loss Si3N4 platform

International audienceSilicon nitride platforms based on ultra-low loss tightly confining waveguides present a great interest for a wide range of applications. We present our 200mm platform based on 800nm-thick LPCVD Si3N4 with optical losses below 5dB/m. It is completed with a set of photonic components specially developed for this platform: grating and edge fiber couplers, directional couplers, MMI, Y-junction, racetrack resonators and an AWG multiplexer. The Si3N4 platform and its device library are the basic building blocks for more complex circuits targeting advanced applications: LiDAR, microwave optics, quantum photonics, neuromorphic computing and sensors

A Complete Si Photonics Platform Embedding Ultra-Low Loss Waveguides for O- and C-Band

International audienceWe report ultra-low propagation losses in silicon submicrometric waveguides on a 200 mm CMOS compatible photonics platform. We show losses in C-band (O-band) as low as 0.1 dB/cm and 0.7dB/cm (0.14dB/cm and 1.1dB/cm) in monomode rib and strip waveguide geometries, respectively, thanks to a H2 smoothing annealing. In addition to optical losses down to unprecedented levels in silicon waveguides, we show that the performance characteristics of the main passive and active building blocks of the photonics platform are preserved or even improved by the smoothing process

Ultra Low-Loss Silicon Waveguides for 200 mm Photonics Platform

International audienc

Monolithic Integrated Slot-Blocker for High Datarate Coherent Optical Slot Switched Networks

International audienceRecent progresses on monolithic SOI-based integration are presented for achieving high-performance slot-blocker for cost-sensitive metropolitan and datacenter networks. We review several nodes architectures for such optical slot switching ring networks. Such devices integrate up to 65 functional elements, allowing complex operations such as polarization and wavelength (de)multiplexing with sub-wavelength switching capability. Compact footprint, fast switching time (below 10 ns) as well as high extinction ratio (more than 20 dB) are demonstrated. We demonstrate the fast add/drop operation of advanced modulation formats (56/80 Gbit/s SP-QPSK, 128 Gbit/s PDM-QPSK, 256 Gbit/s PDM-16QAM, and 320 Gbit/s PDM-32QAM) using three generations of integrated slot-blockers