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This research aims to explore the integration of femtosecond laser techniques for reconfigurable photonic circuits in glass.

August 2, 2026PhotonicsOpen Access

Reconfigurable Photonic Integrated Circuits in Glass by Femtosecond Laser Writing and Laser-Induced Chemical Etching

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Randomized trial shows feasibility of integrating photonic circuits in glass, suggesting new fabrication methods.

This research aims to explore the integration of femtosecond laser techniques for reconfigurable photonic circuits in glass.
Combined femtosecond laser waveguide writing, chemical etching, and metallization.
Developed a CAD-to-device workflow for co-design of optical, mechanical, and electrical structures.
Implemented a stress-assisted waveguide-writing regime in borosilicate glass at writing speeds of 30 mm/s.
Successfully demonstrated stable guiding and directional coupling in fabricated devices.
Achieved a full 2π phase shift using thermally isolated phase shifters with ~17 mW power consumption.
Established a monolithic integration method of passive circuits with actively tunable components.

Lichtenegger et al. (2026) studied this question.

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