An Optics Sensor Using Nonliear Dynamical Sensitivity

Abstract

The nonlinear dynamical sensitivity of a semiconductor laser with an additional degree of freedom is proposed to apply in a coherent light detector or a optics sensor, where an optoelectronic time-delay feedback semiconductor laser, having a high nonlinear dynamical instability, is presented as a sensing system or a reference laser. From the view of physical mechanism, we find the stable points of laser system is changed with an external coherent light injection levels in theory. Which results in new stable points showing and also implies a high instability dynamics happening. Dynamical behavior of the referent laser is changed by the injected coherent light while its dynamics behavior is monitored by detecting its behavior change. A novel double-cycle laser coherent light sensor is studied and analyzed via the above nonlinear physical mechanism while its physical model is presented and the stable points of laser system are discussed. We find that the sensor can recognize accurately an injected coherent light signal from both intensity and frequency detuning while the injected coherent light can be measured by detecting the change of the laser output behaviors. The obtained result illustrates that this sensor is very useful for us study to some new optics sensors and photoelectric detectors.