The Research Of An Optical Fibre Doped With Semiconductor Nano-Particles

With the rapid growth of the information needs nowadays, optical communication technology becomes the core of the information highway, and currently fiber optic networks are moving in the direction of the development of all-optical networks. The all-optical wavelength conversion technology, which based on the FWM (Four-Wave Mixing) technology of high nonlinear fibre, has the advantages of broadband multi-channel transform capacity, ultra-high response speed that more excellent than the electronic devices' rate limit, shows the wild usage in WDM networks. Therefore, the research on high nonlinear fibre becomes a hot spot of the functional fibre research filed.First of all, this article states the overview of nonlinear optical research. Then combined the nano-technology with the fibre fabrication technology, the InP particles at nano-scale is chosen to fabricate the novel optical fibre doped with InP through a modified MCVD (Modified Chemical Vapor Deposition). Compared with ordinary optical fiber, this fibre is special that it has InP particles doped in its core. Through experiment, the consistency of InP is approximately 0.1% in the core, and the particles scale is about 20nm, and the fibre has an excellent waveguide characteristic. Based on the experiment, a core model that the particles uniformly distributed in is built, and obtained the effective refractive index n_eff = 1.400 and the effective core area A_eff≈10.01μm² that is less than ordinary fibre and different with ordinary refractive index distribution. According to the result above, the nonlinear coefficientγ≈10.53W^-1/km is got, and this result reflects that this novel optical fibre has a strong nonlinearity.Based on the research above, we got this conclusion that, a more cyclical distribution and less dense of the particles in the core will have a less propagation loss, a better light control performance, and a higher nonlinearity, so that it can be easily used in multiple optoelectronic devices. This research leads a way for continuous research.At last, this article gives a brilliant future of this fibre and believes that this kind of fibre can open up new roads in nonlinear fibre field.