All Fiber Photoelectric Device With Graphene Integrated On Coreless Side-Polished Fiber

With the development of communication technology,optical fiber communication has occupied a very important position in today's communication system.Therefore,optical fiber communication devices play an increasingly important role.The improvement of performance and diversity of optical fiber communication devices will greatly improve the quality of communication.Nowadays,the research of optical fiber communication devices has become a hot research field in the world.Under this premise,this paper studies the role of electro-optical modulator of fiber waveguide,with an eye to making a new type of device structure and exploring an electro-optical modulator with optional wavelength by using the structural characteristics of coreless side-polished fiber and the photoelectric characteristics of graphene.In this paper,we propose a device that integrates graphene with a coreless side-polished fiber structure,and study the devices based on this structure,especially the electro optical modulation function,the influence of polarization state and the photoelectric detection function of this device based on graphene composite waveguide structure.First of all,after investigation and research for a large number of domestic and foreign related research and literature,we design an integrate graphene in threw the structure of core side-polished fiber(CSPF),and explore its production process,using the method of physical vapor deposition coating process,optical fiber grinding process and CVD graphene samples of transfer by wet process and other methods to make the device.Then through 'software simulation found that the existence of a kind of special mode loss,this is because the polymethyl methacrylate(PMMA)film,the existence of the existence of PMMA coupling leads to make specific wavelengths of light and PMMA graphene contact more with the evanescent field and produce loss,the resulting loss will change over the temperature of graphene,so as to realize absorption valley intensity modulation and absorption wavelength shift modulation.Next,the performance of the device is tested and characterized in detail,which proves that the device can achieve electro-optical modulation function with modulation wavelength of lambda =1539 nm and modulation depth of-1.2 d B/V,while the intensity of non-modulation wavelength is not affected by voltage change.The maximum displacement of the absorption valley at 6 V voltage modulation is 1.1 nm.At the same time,the polarization state can modulate the modulation effect of the device.In TM polarization state,the maximum modulation depth is-1.2 d B/V,and the modulation wavelength is 1539 nm.In TE polarization state,the modulation depth drops to-0.3 d B/V,and the modulation wavelength moves to 1542 nm.And the device realizes the photoelectric detection function at the same time.1.Structure innovation: the use of graphene with PMMA as modulation material at the same time,with no core side grinding fiber as optical waveguide,integrate the two,to produce a new type of device in this paper,using graphene and PMMA as modulation material at the same time,with no core side grinding fiber as optical waveguide,integrate the two,to produce a new type of device;2.Mechanism innovation: in this paper,the mode loss mechanism was realized by placing graphene in PMMA and coreless side-polished fiber composite waveguide;3.Modulation function innovation: in this paper,graphene is integrated into a coreless side-polished fiber structure device to realize the modulation function of absorption valley intensity and displacement modulation of absorption valley wavelength in the communication band;4.Integrated function innovation: in this paper,graphene is integrated into the coreless side polished fiber structure devices,and electro-optical modulation and electro-optical detection functions are realized at the same time.