Abstract
We present a tunable mode filter for spatially multiplexed laser beams carrying orbital angular momentum (OAM). The filter comprises an optical geometric transformation-based OAM mode sorter and a spatial light modulator (SLM). The programmable SLM can selectively control the passing/blocking of each input OAM beam. We experimentally demonstrate tunable filtering of one or multiple OAM modes from four multiplexed input OAM modes with vortex charge of , , , and . The measured output power suppression ratio of the propagated modes to the blocked modes exceeds 14.5 dB.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Gregorius C. G. Berkhout, Martin P. J. Lavery, Miles J. Padgett, and Marco W. Beijersbergen
Opt. Lett. 36(10) 1863-1865 (2011)
Hao Huang, Guodong Xie, Yan Yan, Nisar Ahmed, Yongxiong Ren, Yang Yue, Dvora Rogawski, Moshe J. Willner, Baris I. Erkmen, Kevin M. Birnbaum, Samuel J. Dolinar, Martin P. J. Lavery, Miles J. Padgett, Moshe Tur, and Alan E. Willner
Opt. Lett. 39(2) 197-200 (2014)
Vladimir S. Lyubopytov, Alexey P. Porfirev, Stanislav O. Gurbatov, Sujoy Paul, Martin F. Schumann, Julijan Cesar, Mohammadreza Malekizandi, Mohammad T. Haidar, Martin Wegener, Arkadi Chipouline, and Franko Küppers
Opt. Express 25(9) 9634-9646 (2017)