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Modeling & Design Software
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powerful tools for efficient laser development and laser science
This page gives you an overview on our software products.
RP Fiber Calculator is a convenient tool for calculations on optical fibers.
RP Fiber Power is an extremely flexible tool for designing and optimizing fiber devices.
RP Resonator is a particularly flexible tool for laser resonator design.
RP ProPulse can simulate the pulse evolution e.g. in mode-locked lasers and sync-pumped OPOs.
RP Coating is a particularly flexible design tool for dielectric multilayer systems.
RP Q-switch can simulate the power evolution in Q-switched lasers.
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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.

Results

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.

telecom signal before and after the fiber

Figure 1: Time-dependent power of the pseudorandom bit sequence before and after the fiber.

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.

eye diagram for the telecom signal after the fiber

Figure 2: Eye diagram for the telecom signal after the fiber.

Of course, one could easily include further aspects in the simulation, for example a chirp of the input signal.

(back to the list of example cases)

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