On chip coherent phase and intensity control for atmospheric turbulence mitigation with multi-plane light conversion
We demonstrate coherent on-chip combining for atmospheric turbulence mitigation using Multi-Plane Light Conversion (MPLC). A Niobate Lithium (LiNbO3) photonic integrated chip (PIC) was manufactured to optically combine via balancing and rephasing of 8 disturbed signals collected and demultiplexed by an MPLC. Cascaded on-chip Mach-Zehnders interferometers containing controllable phase shifters allow combining of optical inputs two at a time. Optical leaks are used as feedback loops. After 3 stages, all signals are coherently combined into a main output. We present efficiency, bandwidth, and compatibility with telecom operation of the PIC recombination.
David Allioux received his PhD in physics from the University of Lyon. He joined Cailabs in 2018 as a Project and Product Manager. He is responsible for the development and integration of the product line dedicated to laser communications.