The ornamental design for a laserlightsource, as shown and described.
FIG. 1 is an isometric view of a laser light source;
FIG. 2 is an front view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof.
FIG. 6 is a top side view thereof; and,
FIG. 7 is a bottom side view thereof.
The broken lines showing the arrangement of certain features of the device are for illustrative purposes only. The broken lines are environmental and form no part of the claimed design.