BE Seminar > Pawel

Wednesday 15 Oct 2025, 09:00 → 10:00 Europe/Zurich

14/5-022 (CERN)

09:00 → 09:50 Prototyping Thermal Control Tuning Unit for a Photonic u-Ring Modulator

Achieving 100Gb transmission in newly designed radiation-hard photonic transceivers requires precise thermal control of micro-ring modulators (MRMs), which are highly sensitive to temperature variations. To maintain resonance, MRMs are tuned using integrated heaters and a closed-loop system with photodiode feedback. To support development of the SPRINT ASIC, which implements this control loop, a prototyping platform was built using FPGA and analog components. This enabled streamlined development through experimentation with a transmitter photonic integrated circuit (PIC) containing MRMs. ADC and DAC architectures were explored and optimized with a focus on dynamic range, noise, and alignment with the ASIC implementation. Following the exploration phase, a PCB with the final version of the ADC and DAC was designed and manufactured. The control loop is closed with a PID controller and is currently undergoing further refinement through stability and performance tuning.

Speaker: Pawel Kozlowski

Seminar 15.10.2025.pdf

Seminar 15.10.2025.pptx

09:50 → 10:00 Questions and Answers