  In this report, the optomechanical transductions in both single and two
side-coupled wheel resonators are investigated. In the single resonator, the
optomechanical transduction sensitivity is determined by the optical and
mechanical quality factors of the resonator. In the coupled resonators, the
optomechanical transduction is related to the energy distribution in the two
resonators, which is strongly dependent on the input detuning. Compared to a
single resonator, the coupled resonators can still provide very sensitive
optomechanical transduction even if the optical and mechanical quality factors
of one resonator are degraded.
