Tunable orbital angular momentum mode filter based on optical geometric transformation

Huang, H. et al. (2014) Tunable orbital angular momentum mode filter based on optical geometric transformation. Optics Letters, 39(6), pp. 1689-1692. (doi:10.1364/OL.39.001689) (PMID:24690870)

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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 ℓ=−9, −4, +4, and +9. The measured output power suppression ratio of the propagated modes to the blocked modes exceeds 14.5 dB.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lavery, Dr Martin and Padgett, Professor Miles
Authors: Huang, H., Ren, Y., Xie, G., Yan, Y., Yue, Y., Ahmed, N., Lavery, M. P.J., Padgett, M. J., Dolinar, S., Tur, M., and Willner, A. E.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Letters
Publisher:Optical Society of America
ISSN:0146-9592
ISSN (Online):1539-4794

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