Inner Cladding Fiber Doped With Nano InP And Its Amplification

As the requirement of information increases quickly, optical fiber communication technology has been a tower of strength in the high speed of communication. There into, point to multi-points technology in DWDM and fiber amplifier are the leading tendency, so development of DWDM system and fiber amplifier should be at the same rate. But the access to increase communication capacity of DWDM and bandwidth of fiber amplifier are difficulties and hot spots. To be the important components of fiber amplifier, amplifying fiber is top priority in the fiber communication.First, this thesis gives an introduction of the development of the optical amplifier and amplifying fiber; Combining nano technology with fiber technology, a new type of fiber is fabricated by depositing nano material between the core and cladding of fiber. Through analyzing III-V semiconductor and preparation of nano particles, InP is chosen to be the doped material and MCVD is chosen to make the fiber. Inner cladding fiber doped with nano InP is manufactured, and there is a 16nm-70nm InP-film locating between core and cladding of fiber; Aiming at the structure of this fiber, a model is fabricated to analyze it. The optical guide in fiber and the mechanism of amplification are studied theoretically. Also, carrier model is established, and light propagation equation is shown in the thesis, by which the relationship between the output of light power and the length of this fiber is obtained; In experimental aspect, a testing system is designed and established, 532nm pump light is put into this fiber, and truncating method is adopted to exam the loss and gain. The final result prove that its signification amplification characteristics for wavelength between 1080nm and 1491nm, and also found in wavelengths 906-1044nm and 1524-1596nm.In the end, the thesis presents a positive outlook and analysis on the nano material that improving the characterization of fiber, and gives sorts of research and study on the applying future of this fiber.