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Consulting Software Encyclopedia Buyer's Guide

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Dr. Paschotta, the founder of RP Photonics, supports your R & D with his deep expertise. Save time and money with efficient support!

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Powerful simulation software for fiber lasers and amplifiers, resonator design, pulse propagation and multilayer coating design.

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The famous Encyclopedia of Laser Physics and Technology provides a wealth of high-quality scientific and technical information.

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In the RP Photonics Buyer's Guide, you easily find suppliers for photo­nics products. As a supp­lier, you can profit from enhanced entries!

Uttermost power and flexibility to get your work done!
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.
Most of our software products support a powerful script language, which gives you an extraordinary degree of flexibility.
Here you learn about software license conditions, updates and upgrades, etc.
Competent technical support is a key quality associated with software from RP Photonics.
RP Photonics has distributors in various countries.
The RP Photonics Software News keep you updated on our developments and give the users additional interesting hints.
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RP ProPulse – Numerical Simulation of Pulse Propagation

Example Case 7: Soliton Soliton Self-frequency Shift

In this example, we investigate the soliton self-frequency shift arising from stimulated Raman scattering in a fiber. The Raman gain, getting stronger towards longer wavelength, amplifies the longer-wavelength components within the pulse spectrum at the expense of power in the shorter-wavelength parts. In effect, the pulse spectrum more and more drifts towards longer wavelengths. Also, there is a slight decrease of pulse energy and an increase of the pulse duration. It has been assumed that there is no higher-order dispersion.

pulse parameters vs. propagation length

The diagram above compares the numerically simulated evolution of center wavelength with that of a simplified analytical model. They agree well.

Below you see results of a simulation where the pulse duration is varied. In agreement with the analytical theory, the numerical model shows that the self-frequency shift becomes substantially stronger for shorter pulse durations. This is because shorter pulses have a higher peak power and a broader spectrum, within which the Raman gain (increasing with the frequency offset) can have a stronger effect.

wavelength shift vs. pulse duration

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