Arbitrary shaping of on axis amplitude of femtosecond Bessel beams with a single phase only spatial light modulator.
Arbitrary shaping of the on axis intensity of Bessel beams requires spatial modulation of both amplitude and phase. We develop a non iterative direct space beam shaping method to generate Bessel beams with high energy throughput from direct space with a single phase only spatial light modulator. For this purpose, we generalize the approach of Bolduc et al. to non uniform input beams. We point out the physical limitations imposed on the on axis intensity profile for unidirectional beams. Analytical, numerical and experimental results are provided.
Optics express