The oscillation of a laser-generated cavitation bubble near a solid boundary is investigated with a home-made optical fiber sensor. The oscillogram corresponding to that the radius of the cavitation bubble expands to the maximum for 3 times is experimentally studied, based on which the maximum bubble radius and the collapse time for each oscillation cycle are determined. By combining the collapse theory of the cavitation bubble, the prolongation factor κ of the collapse time is calculated. A dimensionless parameter γ is defined as L/Rmax, where Rmax is the maximum bubble radius and L is the distance from the cavity core to the boundary. The results show that, the maximum bubble radius decreases with the increase of the oscillation time, with the rise of the laser energy Rmax and κ increase, and the rise of γ minishes κ. The polongation factor κ derived above is also valid in the infinite liquid field.