Experimental Study On The Control Of Chaotic Fiber Laser Based On PS-FBG

Chaotic lasers exhibit large bandwidth,strong anti-interference,and autocorrelation δ Functions and other excellent characteristics have continuously expanded its application fields.Such as the application of chaotic laser in fields such as chaotic optical fiber sensing,chaotic laser radar,and chaotic secure communication.Then there is a higher and higher demand for chaotic laser which can output chaotic laser.Compared with semiconductor chaotic laser,chaotic fiber laser has the advantages of high conversion efficiency,rich regulation mode,can adapt to a variety of application environment,simple structure,easy placement,affordable and so on,can better meet the new requirements of chaotic laser application,has a unique and important position.Especially,the Erbium-doped chaotic fiber laser can not only output high quality chaotic laser,but also has the advantages of large gain,the output wavelength of 1.55 μm is in the lowest loss window of fiber communication,which has important research significance.Under the new challenges and demands,the research of erbium-doped chaotic fiber laser which can output chaotic laser becomes more and more important.Therefore,the structure of Erbium-doped chaotic fiber laser,the properties of output chaotic laser and its regulation mode are studied in this paper.The main work of this paper is as follows:1.An Erbium-doped fiber ring laser based on Phase-shifted fiber grating mode selective filtering is designed.The experiment verifies that the system can enter the chaotic output state by adjusting the light field energy.And shows the process of entering chaos output.2.Based on a single-loop Erbium-doped fiber ring laser,a double-loop selffeedback cavity is constructed and a self-feedback time delay is introduced.By changing the double-loop structure and the output power of Erbium-doped optical fiber Amplifier,the influence of them on the bandwidth,time delay signature and signal periodicity of the chaotic laser output by the system is investigated experimentally.3.The PS-FBG,which is placed inside the laser system and has the function of filtering mode selection,is subjected to temperature control experiments ranging from35℃ to 80℃.The experimental results show that temperature control has a weak influence on the chaotic output,which can cause the change of the autocorrelation peak value of chaotic signals.It enriches the regulation mode of Erbium-doped chaotic fiber lasers and has certain illuminating significance for exploring new chaotic sensing models.