Abstract
Using transmitting volume Bragg gratings (TVBG) as a basis, an experiment on
one-dimensional spatial filtering of a deformed laser beam is designed. The deformed
laser beam results from a He-Ne laser beam modulated by an amplitude modulation
plate with a spatial frequency of 7.2 mm ?1. Results show that when the central wave
vector of the deformed beam satisfies the Bragg law of TVBG, the spatial profile of
the -1st forward-diffracted order is similar to that of the undeformed He-Ne laser
beam due to the TVBG with a spatial frequency selective bandwidth of less than 5.0
mm?1. The higher frequency components of the deformed beam are filtered out in the
optical near field. Thus, the TVBG cleanup of the spatiallydeformed laser beam is
realized experimentally.
© 2011 Chinese Optics Letters
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