There will be a wide range of applications in the field of optical communication

AddTime£º27-09-2016   Author£ºadmin

First of all, it is the extension of single mode working wave band. For ordinary single-mode fiber, C band is currently in use and development (1530-1565nm), L band (1570-1620nm) and S band (1450-1520nm) the total bandwidth is about 150nm, and the PCF band extended 600-700nm development mode to the short wavelength direction, in order to increase the number of channels of WDM technology provides broadband resource rich.

Secondly, PCF will not have the characteristics of ordinary single-mode fiber to bring new changes in the application of optical fiber. Especially in the WDM long-distance communication, the current research goal is locked in the air core, the periodic structure of the cladding of the band gap waveguide PCF. As mentioned above, because of this fiber using air as the core, the original traditional fiber SiO2 impurity intrinsic absorption, and the effect of material dispersion, fiber nonlinearity caused by all eliminated, which has revolutionary significance to the WDM long-distance optical communication, and the earth will promote the development of optical communication technology.

At present, research on production technology and laser characteristics of PCF has made great progress, but the transmission characteristics of how to reliably and accurately predict PCF, there appears to be no satisfactory mathematical module, provides a broad space for the development of the PCF technology. The principle of effective index model is that the PCF is roughly equivalent to the step index optical fiber, which ignores the complex refractive index distribution of the PCF cross section. Although the distribution and size of some PCF air holes can be given.