Several options exist to reduce laser speckle. Commercially available ones cost over $600. A simpler method can be a laser focused on the end of a rigid fiber optic bundle. Using a small motor, the fiber is rotated around the laser's optical axis. This provides mode mixing from the splitting of single point source ( laser) into multiple modes due to transfer through the fibers of fiber bundle (spatial coherence reduction) and due to rotation of bundle (temporal coherence reduction).