Abstract
The mode interference that accompanies spatial filtering of the radiation coming out of a multimode fiber lightguide with scattering and nonscattering end surfaces has been experimentally studied for propagation both of optical vortices and of ordinary waveguide modes. It is established that the mode interference created by the output radiation of optical vortices with identical directions of rotation of the wave front is greater than that created by waveguide modes with a planar wave front, because of the difference of the size of the speckle spots. It is shown that, when optical vortices are present in a lightguide, the SNR can be increased by artificially creating diffuse scattering at the input or output end surface.
© 2013 Optical Society of America
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription