Robust interferometer for the routing of light beams carrying orbital angular momentum

Details Robust interferometer for the routing of light beams carrying orbital angular momentum Robust interferometer for the routing of light beams carrying orbital angular momentum

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13i3014l&link_type=abstract

New Journal of Physics, Volume 13, Issue 9, pp. 093014 (2011).

Physics

Scientific paper

We have developed an interferometer requiring only minimal angular alignment for the routing of beams carrying orbital angular momentum. The Mach-Zehnder interferometer contains a Dove prism in each arm where each has a mirror plane around which the transverse phase profile is inverted. One consequence of the inversions is that the interferometer needs no alignment. Instead the interferometer defines a unique axis about which the input beam must be coupled. Experimental results are presented for the fringe contrast, reaching a maximum value of 93±1%.

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