Case Studies for Fiber Lasers, Amplifiers, Script Language, Fiber Modes, Dynamic Simulations, Ultrashort Pulse Propagation (original) (raw)
Case Studies with RP Fiber Power
Case Studies Using Power Forms
We have many interesting case studies for which we have used our Power Forms. This demonstrates how versatile these Power Forms are.
Mode Structure of a Multimode Fiber
We explore various properties of guided modes of multimode fibers. We also test how the mode structure of such a fiber reacts to certain changes in the index profile, e.g. to smoothing of the index step.
#modes
Number of Modes of a Highly Multimode Fiber
We seek a simple equation for estimating for the number of modes of a highly multimode fiber, which can be applied to fiber designs with arbitrary shapes of the refractive index profile. Instead of applying complicated mathematics, we build a hypothesis and subject that to multiple numerical tests.
#modes
Dispersion Engineering for Telecom Fibers
We explore different ways of optimizing refractive index profile for specific chromatic dispersion properties of telecom fibers, resulting in dispersion-shifted or dispersion-flattened fibers. This also involves automatic optimizations.
#modes#dispersion#telecom#video
ASE in Ytterbium-doped Fibers
We study various aspects of amplified spontaneous emission (ASE) in ytterbium-doped fibers — for example, why it is different in forward and backward direction, how the fiber length can have a crucial impact, and how the fiber core diameter matters.
#amplifiers#ASE
Ytterbium-doped 975-nm Fiber Lasers
We explore how to realize Yb-doped fiber lasers emitting at the tricky wavelength of 975 nm. This turns out to be challenging for devices with double-clad fibers due to ASE at longer wavelengths.
#lasers#ASE#video
Nonlinear Pulse Compression in a Fiber
We explore how we can spectrally broaden light pulses by self-phase modulation in a fiber and subsequently compress the pulses using a dispersive element. A substantial reduction in pulse duration by more than an order of magnitude is easily achieved, while the pulse quality is often not ideal.
#pulses#nonlinearities
Soliton Pulses in a Fiber Amplifier
We investigate to which extent soliton pulses could be amplified in a fiber amplifier, preserving the soliton shape and compressing the pulses temporally.
#amplifiers#pulses#nonlinearities
Raman Scattering in a Fiber Amplifier
We investigate the effects of stimulated Raman scattering in an ytterbium-doped fiber amplifier for ultrashort pulses, considering three very different input pulse duration regimes. Surprisingly, the effect of Raman scattering always gets substantial only on the last meter, although the input peak powers vary by two orders of magnitude.
#amplifiers#pulses#nonlinearities
These case studies demonstrate how useful the modeling is for the development of fiber amplifiers and lasers, for example.
(More example cases with Power Forms are in preparation!)
Case Studies Using Demo Scripts
The following example cases are all related to the demo scripts delivered with the software. That approach can be applied even to most special cases.
A first set of examples illustrates the power of the mode solver and the numerical beam propagation:
- launching light into a multimode fiber
- bend effects in a large mode area fiber
- nonlinear self-focusing
- light evolution for a misaligned input beam
- pump absorption in a double-clad fiber
- light in a tapered fiber
- fiber coupler
- mode coupling in a fiber Bragg grating
- actively Q-switched Nd:YAG laser (bulk laser system; dynamic simulation with wave propagation)
- stimulated Raman scattering in a multimode fiber
Further demo files show how to simulate fiber amplifiers and lasers (only steady-state calculations):
Here are some examples of dynamic simulations:
- actively Q-switched fiber laser
- actively Q-switched Nd:YAG laser (bulk laser system)
- actively Q-switched Nd:YAG laser (bulk laser system; with wave propagation)
- passively Q-switched Nd:YAG laser (bulk laser system)
Next, there are demonstrations for simulating the propagation of ultrashort pulses:
- higher-order solitons
- stimulated Raman scattering in a fiber amplifier
- regenerative amplifier (bulk system)
- mode-locked fiber laser
- data transmission
Finally, a demonstration for generating output in other forms:
Even more demo files (in total more than 70) are delivered with the software. As a user, you can simply copy demo scripts and modify them according to your needs. However, you may also easily generate new scripts using the interactive forms.