Femtosecond-Laser-Written Integrated Photonics In Bulk Glass-Ceramics Zerodur

We demonstrated fabrication of waveguide and directional coupler in bulk glass-ceramics Zerodur, through femtosecond laser direct-writing. Single mode waveguide with propagation loss of no more than 1.5 dB/cm at wavelength of 777 nm was achieved. We expect this will lead to the deployment of Zerodur integrated photonics in fields like space-borne astronomy, ultra-precision metrology, quantum technologies and fundamental physics investigation, for both cost and technical advantages.