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New Tutorial on the Modeling of Pulse Amplification

Posted on 2022-12-19 in the RP Photonics Software News (available as e-mail newsletter!)

Permanent link: https://www.rp-photonics.com/software_news_2022_12_19.html

Author: , RP Photonics AG

Abstract: RP Photonics has a new tutorial on the physical modeling of pulse amplification, e.g. in fiber amplifiers. It explains the underlying physics and suitable methods for efficiently simulating the operation of such devices.

Dr. Rüdiger Paschotta

I have published a new tutorial titled “Modeling of Pulse Amplification” (mainly considering fiber amplifiers) which should be useful for many of our software customers, but also for others, who e.g. try to put some suitable model together themselves. The contents:

  • Models for different pulse duration regimes are discussed. It is important to understand which physical effects to include in order to get valid results from a model which is not unnecessarily complicated and time-consuming to use.
  • Gain saturation effects are explained. Again, adapted solutions are proposed which allow for efficient simulations.
  • Simulating pumping and pulse amplification: indeed, it is in most cases advisable to simulate those things separately, as they happen on quite different time scales.
  • For multimode amplifiers, various additional aspects need to be handled properly.
  • Amplified spontaneous emission also has some peculiarities for pulsed amplifiers.
  • Finally, some comments on bulk amplifiers are made. They can largely be treated with the same methods as used for fiber amplifiers, but some aspects are different.

This should help a lot in getting efficient progress in such modeling. It also shows that substantial experience with such things can be important, and that sufficient flexibility of software is required to apply certain nice tricks. Finally, it is clear that it can be very helpful to get competent software support.


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