With the rapid development of nano-physics and quantum optics,optico-mechanical coupling system is developing toward the miniaturization and lightweight.The physical characteristics of optical cavity and applications of opticmechanical devices have received much attention.In this paper,a generalized three-mode cavity optico-mechanical system is presented,the steady-state responses of the system to the characteristics of weak detection of light absorption and dispersion in several different coherent driving modes are studied.Situated in the middle of system is a portable total reflection mechanical oscillator with a reflectance of 100％,and located on each side is a fixed optical cavity mirror with partial transmittance,Three-mode cavity optical mechanical system consists of "fixed-mirror,removable-vibrator,fixed-mirror" structure,in which the two optical cavities are coupled by coupling a stronger control field and weak probe light with the same mechanical oscillator.Analysis and numerical results show that under the mechanism with different parameters,due to nonlinear effect of pressure,in the three-mode cavity optical mechanical system,there appear some interesting quantum coherent phenomena such as coherent perfect absorption,coherent perfect transmission and coherent perfect synthesis.When coherent perfect absorption occurs,the mutual conversion between input signal power full-field energies and oscillator vibration of internal coherence can be realized,and the law of conservation of energy is satisfied.When relaxation rate due to mechanical oscillator is very small,the coherent perfect transmission is completely transmitted from the system side of the input field to the other side in the case of no loss of energy.And mechanical relaxation rate of the oscillator approaches to zero in the middle,which can ensure that the perfect transmission of the detection field takes place on one side,and the field total reflection and coherent perfect synthesis happen on the other side of.In addition,we alsofind that the adjustment of coupling between cavity and cavity can change the intensity of the probe field of quantum coherent control thereby realizing that the output of the detection field is transformed between coherent perfect absorption and coherence transmission;through simple phase modulation the output direction and input direction of detection field for left cavity-right cavity can swap mutually.So,these dynamic controls in quantum information networks can be used to construct some optical devices with special functions,such as photon switch,photo router,photon exchange machine,etc.%提出了一种广义的三模式腔光机械系统,系统的中间是一个反射率为100％的可移动的全反射机械振子,两侧均由一个部分透射的固定光学腔镜构成.其中两个光学腔由一束较强的控制场和一束较弱的信号场驱动与同一个机械振子实现耦合.较弱的信号场将会被该系统完全吸收而不产生任何能量输出,并且当相干完美吸收产生时,输入信号场的能量将由两个腔场和机械模共同分担;较弱的输入信号场由一个腔完美透视到另一个腔而不产生任何的能量损耗.分析与数值结果显示,在不同参数机制下,在该三模光机械系统中可以实现相干完美吸收、相干完美透射和相干完美合成的量子现象.此外,改变腔与腔之间的耦合度,可以实现输出探测场在相干完美吸收和相干完美透射之间转换;通过简单的相位调制,可以实现探测场左腔-右腔的输出和输入方向的互换.这些动态控制在量子信息网络可用来构造光子开关、光子路由、光子交换机等一些特殊功能的光子学器件.
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