Experimental observation of optical vortex evolution in a Gaussian beam with an embedded fractional phase step

Details Experimental observation of optical vortex evolution in a Gaussian beam with an embedded fractional phase step Experimental observation of optical vortex evolution in a Gaussian beam with an embedded fractional phase step

2004-03-25

arxiv.org/abs/physics/0403118v2

Physics

Optics

Accepted by Optics Communication for publication

Scientific paper

10.1016/j.optcom.2004.05.035

We detect the vortex evolution from the increase of the fractional phase step
by interfering two beams of opposite but equal fractional step increment.The
interference pattern generated shows evidence of the birth of an additional
single extra charge as the fractional phase step increase extends above a
half-integer value

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