Phase trimming of polarization beam splitters in LiDAR photonic chips

Planar lightwave circuits (PLCs), a type of photonic chip, play an increasingly large role in a range of applications and have the potential to become a preferable platform in telecommunication, optical computing, and LiDAR systems. LiDAR technology empowers a variety of industries to enhance safety and automation. In the automotive realm, it enables collision avoidance systems and autonomous driving capabilities. LiDAR PLC chips include sensitive components that require the optical properties of the glass waveguides in which the light propagates to be precisely tuned. Currently, optimal performances cannot be reached in mass-produced chips, compromising deployment. Efficient localized tuning in post-production of the optical property of the glass waveguides is needed, but existing approaches are not compatible with the LiDAR chips and scale of interest. The proposed research consists of developing a generalized method for tuning these properties with high precision and high spatial resolution using ultraviolet laser pulses. The project involves developing an irradiation and characterization setup, investigating the influence of various parameters on the laser-induced changes and their stability, developing a predictive model, and optimizing LiDAR chips. The proposed research will enable PLCs to reach their full potential in various areas and contribute to enhance safety in transportation.

Faculty Supervisor:

Hubert Jean-Ruel

Student:

Partner:

Enablence

Discipline:

Engineering

Sector:

Information and cultural industries

University:

Carleton University

Program: