Erwan Weckenmann

• Doctor of Philosophy
• Postdoctoral Fellow at Université Laval

Energy-efficient coherent optics is emerging as a key solution to address the escalating communication demands of large-scale artificial intelligence (AI) and machine learning (ML) tasks. These applications require compact, high-speed, and energy-efficient coherent transceivers. We present an ultracompact, all-silicon I/Q modulator operating in the...

The use of amplification w ith s ilicon p hotonics m odulators i ncreases the achievable baud rate, but leads to non-Gaussian noise at detection. We use neural networks to optimize the constellations for the asymmetric histograms in detected symbols.

The frequency chirping properties of silicon ring resonator modulators (RRMs) are experimentally investigated under sinusoidal modulation. The modulated electric field at the output of an RRM is measured in the time domain thanks to a coherent detection system. The power and phase waveforms are then analyzed in terms of their temporal phase and amp...

The use of semiconductor amplifier in integrated transceivers increases sensitivity, but changes the noise statistics in pulse amplitude modulation (PAM) intensity modulation with direct detection. Using a straight-forward, mixed noise model, we optimize constellations for these systems with an autoencoderbased neural network (NN). We improve requi...

Flat electro-optical frequency combs play an important role in a wide range of applications, such as metrology, spectroscopy, or microwave photonics. As a key technology for the integration of optical circuits, silicon photonics could benefit from on-chip, tunable, flat frequency comb generators. In this article, two different architectures based o...

The frequency chirping properties of a silicon ring resonator modulator are experimentally investigated and compared to a numerical model. The influence of the wavelength detuning and the modulation frequency are highlighted for the first time.

Dual-comb spectroscopy using a silicon Mach-Zehnder modulator is reported for the first time. First, the properties of frequency combs generated by silicon modulators are assessed in terms of tunability, coherence, and number of lines. Then, taking advantage of the frequency agility of electro-optical frequency combs, a new technique for fine resol...