RT Journal Article T1 Spatial mode multiplexing/demultiplexing by Gouy phase interferometry A1 Liñares Beiras, Jesús A1 Prieto Blanco, Xesús A1 Montero Orille, Carlos A1 Moreno de las Cuevas, Vicente K1 Interference K1 Multiplexing K1 Fiber optics communications K1 Gradient-index lenses AB We present a theoretical study about spatial mode multiplexing/demultiplexing (mux/demux) without theoretical losses by means of interferometry with selective control of the Gouy phase of optical beams, that is, Gouy phase interferometry (GPI). Different Gouy phase values can be obtained by inserting appropriate optical systems at each arm of an interferometer. Thus, spatial mode mux/demux operations of strategic interest in optical communications with few-mode optical fibers are implemented by means of constructive interference and regardless of the parity and separability of the optical beams. Consequently, unachievable mux/demux by interferometry based on image inversion methods becomes possible with GPI. This kind of operation can also be interesting for optical sensors, optical metrology, image processing, and so on. PB Optical Society of America SN 1539-4794 YR 2016 FD 2016 LK http://hdl.handle.net/10347/33479 UL http://hdl.handle.net/10347/33479 LA eng NO Jesús Liñares, Xesús Prieto-Blanco, Carlos Montero-Orille, and Vicente Moreno, "Spatial mode multiplexing/demultiplexing by Gouy phase interferometry," Opt. Lett. 42, 93-96 (2017) DS Minerva RD 25 abr 2026