Multi-color, Multi-path Optical Beam Steering Utilizing High Performance MEMS Mirrors

Scaling current atomic based quantum computer experiments beyond individual gate operations requires an efficient means of distributing laser resources across an array of trap sites. Micro-electromechanical system (MEMS) technology can provide the scalability and flexibility in an optical beam steering system to effectively share multiple, independent lasers among trap sites within a $1$D or $2$D qubit array. Controllable micro mirrors with broadband reflective metal coatings enable concurrent multi-wavelength beam steering along multiple beam paths as well as wavelength multiplexing along the same beam path. We demonstrate a MEMS based beam steering system that addresses $49$ locations in a $7$x$7$ array with two separate wavelengths at $635$ nm and $780$ nm. This system features switching speeds between lattice sites of $4$ $\mu$s and $-29$ dB residual optical intensity at neighboring array locations.