  We investigate the response of a harmonically confined mirror to an optical
pulse in cavity optomechanics. We show that when the pulsed coupling strength
takes the form of a chirped pulse, thermal fluctuations of the mirror can be
significantly transferred to the cavity field. In addition, the frequency
modulation of the pulse could enable a better cooling performance by
suppressing the sensitivity of the dependence of detuning and pulse areas.
Using numerical investigations, we find that the pulsed-cooling is mainly
limited by the cavity-field decay rate.
