Adaptive control of waveguide modes in a mulitmode waveguide

Multimode optical waveguides, including optical fibers, are traditionally regarded as unsuitable for a wide range of applications such as communications and sensing. A main challenge in using multimode waveguides for aforementioned applications is how to control the spatial profile of optical waves propagating within the waveguide. In this paper, we present experimental studies that demonstrate the feasibility of using adaptive optics (AO) and waveguide devices such as directional couplers to control the form of guided wave in a multimode waveguide.