# Videos & Tutorials

**Visualising Monte Carlo simulations**

Monte Carlo calculation of Pi converging towards three decimal places.

**Multiplexing of Laguerre-Gaussian beams**

Nine holograms to generate Laguerre-Gaussian beams are multiplexed with different carrier frequencies (left). In the Fourier plane, the carrier frequencies manifest as different spatial positions for each beam (right).

**Polarisation**

Polarisation distribution across a Gaussian beam propagated through a quarter waveplate at an angle of 45 degrees.

**Pertubations**

The phase change of a laser beam as it passed through two cylindrical lenses, one slowly rotated relative to the other. The phase changes from purely astigmatic to spherical, and back.

**Rotating Bessel Beams**

The superposition of two Bessel beams with opposite OAM charge (l = -+2) and different wavevectors rotates during propagation.

**Visualising Monte Carlo simulations**

Two-dimensional simulation of diffusion.

**Holography**

Illustration of the versatility of digital holograms in beam shaping.