Journal
JOURNAL OF OPTICS
Volume 13, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/13/6/064006
Keywords
optical angular momentum; computer-generated holograms; optical communication systems
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Funding
- Mac Robertson travel scholarship
- Royal Society
- DARPA through the US Army Research Office [W911NF-10-1-0395]
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We recently demonstrated a new method to efficiently analyse the orbital angular momentum (OAM) states of light by application of an optical geometric transformation (Berkhout et al 2010 Phys. Rev. Lett. 105 153601). Here we study the performance of such a system to measure the change in the observed OAM spectrum, as the input beam is misaligned with respect to the analyser. We present modelled and experimental results which show that our reformatting approach does correctly measure the OAM spectrum for lateral and tilt misalignment of the input beam.
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