RP Fiber Power – Simulation and Design Software
for Fiber Optics, Amplifiers and Fiber Lasers
Example Case: Data Transmission through a Germanosilicate Fiber
Description of the Model
Here, we simulate the transmission of a data signal in a glass fiber. The mode parameters of the fiber are calculated with the mode solver from a given germanium doping profile.
A pseudorandom NRZ (non return to zero) signal with 40 Gbit/s is created and propagated through 5 km of the fiber.
Figure 1 shows the signal before and after the fiber. There are substantial signal distortions, caused mainly by the chromatic dispersion and to some extent also from the Kerr nonlinearity.
Figure 2 shows an eye diagram. As the “eye” is wide open, the signal could still be well detected. For twice the fiber length (not shown here), this would be different.
Of course, one could easily include further aspects in the simulation, for example a chirp of the input signal.