Using Ase Light Source To Achieve Optical Bistability

Optical Bistability(OB) is latest optical topic about studying steady state anddynamic state actions of nonlinear optics system which have feedback property. OpticalBistability Device (OBD) has excellence characteristics such as processing light signaldirectly, short time of on-off, parallel disposing signals. It has a potential application forhigh-speed fiber communication, light storage, high-speed optical switch, processing ofoptical information and stabilization of laser power and sensor of OB. So, in-depthresearching of optical bistability effects has very important significance.Intensity optical bistability in the domain of frequency have widest applicationfield and be attention in the deeply studying of can-tune optical source. In this paper,non-coherent Amplified Spontaneous Emission (ASE) broad band light source wereapplied as the source of OBD, tunable Fiber Fabry-Perot (FFP) filter was used aswavelength choose device. Photoelectron Hybrid OB in Frequency domain has been finishedsuccessfully .If forming optical bistability, there are two conditions must satisfied. Theone is nonlinear modulating finished by using Fiber Bragg Grating (FBG) modulateddevice. The other one is feedback provided by voltage signal after photoelectronexchange which added tunable fiber F-P filter.The basic theory of OB was analyzed in detail. The outputs of different coefficientOBD were numerical calculated using equation of modulating curve and feedback curve.It is easily to choose the working parameter by simulative analyzing the variationaltrend of output of OBD. During experiment process, optical bistability were achievedby altering incidence light intensity, amplifier multiple, put voltage. And the variationalprinciple of bistability can be observed easily. Moreover, optical bistability output oftwo grating cascade connection were made. This can provided an experiment referencefor the bistability researching of distributed grating.