News on Software from RP Photonics
Here we publish (roughly once per month) news and useful hints on software – for example, about the use and application of our software products, new features, updates and upgrades, and on algorithms. We do this in the form of a blog, which we try to make informative and useful.
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And here are the articles:
Numerical beam propagation is a very versatile technique in optics and photonics. However, the choice of grid parameters is not a trivial matter; this issue is discussed in some detail here.
The concept of namespaces is very useful for avoiding name conflicts in programming languages. It has thus been implemented in the script language supported by software from RP Photonics - e.g. RP Fiber Power. Here, it is explained with a real-life example which awkward problems can be elegantly solved with namespaces.
When simulating the propagation of ultrashort light pulses, you need to numerically represent those pulses. Here, you can learn how to properly do that and take care of various important limitations. That is highly relevant if you either use a pulse propagation software or develop one yourself.
Thermal lensing needs to be taken into account in some simulations concerning lasers or amplifiers. Here, it is briefly described what the origins of thermal lensing and then how that effect can be treated in software from RP Photonics, namely in RP Fiber Power and RP Resonator.
This article reports various improvements of the simulation and design software RP Fiber Power for fiber lasers, fiber amplifiers and passive fiber devices. Existing users can obtain free updates.
For modeling pair-induced quenching processes e.g. in erbium-doped fiber amplifiers, one needs array equation model where the excitation rate is properly reduced for paired ions. Recently, the software RP Fiber Power has been extended such that this can be done. License holders can get a free update.
This article explains how to make nice color plots in various software programs of RP Photonics. It is quite simple to use the cp: command in conjunction with predefined color scale functions.
Optical amplifiers and other devices containing multiple active fiber stages can be modeled with the software RP Fiber Power. The article discusses different approaches and shows you how to easily implement quite sophisticated models.
Although it may seem to be simple to numerically simulate the self-starting behavior of a passively mode-locked laser, there can be various substantial difficulties, making such approaches impractical.
In simulations of the amplification of ultrashort pulse trains, it can be a challenge to find the steady state of the amplifier. The article explains different matters, which can be easily applied with suitable simulation software such as RP Fiber Power.
It can be rather hard to track down numerical problems e.g. in beam propagation and to find practical solutions. However, some good methodology can help a lot. An example case allows you to take home a number of quite useful lessons.
The main software products of RP Photonics have been equipped with further substantial new features, including syntax highlighting, parameter help on built-in functions, syntax checking and automatic code reformatting.
Various software products from RP Photonics have obtain substantial improvements - notably a script debugger in the latest versions, but also a number of other nice features which users of previous versions can obtain with free updates.
For practical laser resonator designs, it is essential to consider the sensitivity to a misalignment of resonator mirrors. Here, it is explained how that sensitivity can be calculated and taken into account in numerical optimizations.
It is explained what physically determines the emission wavelength of a laser with a broadband gain medium, and how one can most efficiently calculate the emission wavelength with a numerical model.
The RP Fiber Power software it has been extended such that stimulated Raman scattering can now be included in simulations with numerical beam propagation. The implementation is highly flexible, allowing for arbitrary transverse profiles of nonlinear coefficients and interactions between a substantial number of waves with different wavelengths.
Here you can get a quite useful introduction into the problem of character encodings in computer memory and files. Also, the article discusses how software from RP Photonics has been modernized such that it can avoid encoding problems in virtually all cases.
There are certain situations where the results from simplified analytical or numerical laser models can be very misleading, because reality is substantially more complicated. In some situations, it is even better to refrain from laser modeling, because realistic models are not practical. In practice, it can be essential to obtain competent otherwise on such matters.
This article introduces a convenient new feature for all our software products supporting our powerful script language. It allows the execution of additional scripts after your main script, for example in order to generate additional outputs.
Pump and signal waves in fiber amplifiers and lasers can exhibit substantial transverse intensity variations. Nevertheless, computer models neglecting the transverse dimension, only using some overlap factors, can produce very reasonable results, as long as the intensity profiles of the involved waves are at least relatively similar. With proper simulation software, one can of course easily test such things.
This posting tells you about a number of really handy software tools from another software company. They are useful for everyday work at the computer, and partly for those who deliver software to others.
It is shown how the propagation of ultrashort pulses e.g. in mode-locked fiber lasers, bulk lasers, regenerative amplifiers and fiber amplifiers can be numerically simulated - specifically, with the software RP Fiber Power from RP Photonics. The used concept, involving function calls rather than commands for sending the pulse through various optical components, turns out to be extremely flexible, allowing the user to implement quite sophisticated simulations.
A new feature has been implemented in our software products RP Fiber Power, RP Coating, RP ProPulse and RP Resonator: the code snippets library, where you can conveniently get snippets of script code for common purposes. Our customers can get this with a free update.
This article explains how data can be exported to files (all imported from files) in software from RP Photonics. Certain script commands and functions give you the uttermost flexibility.
This article demonstrates how a script language in a powerful simulation software allows you to calculate things which are apparently not covered with the offered features. The discussed example case is a fiber laser containing two active fibers rather than only one, as usual.
RP Photonics has changed its policy concerning 64-bit software versions: every user now has the free choice between a 32-bit and 64-bit version.
For software from RP Photonics, commercial and non-commercial licenses are available. This article discusses what exactly is considered as non-commercial, what difference it makes for the user and what happens if the type of use changes.
In the software products RP Resonator for laser resonator design and RP Coating for thin-film optics, it is now possible to define so-called custom forms - forms which can be tailored to specific applications by the users or within the technical support. That feature has previously been introduced for the RP Fiber Power software.
This article explains the most important features of our expression engine, which is contained in various software products for the modeling of fiber amplifiers and lasers, passive fiber optics, bulk lasers and multilayer optics. It demonstrates that expressions can not only be used for performing sophisticated mathematical calculations, but also for defining and modifying physics models, storing or retrieving data in or from files, defining optimization goals and displaying results in text or graphical form.
This article gives you a lot of useful hints for preparing plots with our software. Along the x axis of a diagram, you can vary any operation or system parameter. It is not difficult even to implement additional options, such as to automatically adjust an input power so as to obtain a certain output power.
There can be many reasons not to engage in computer modeling in the context of laser development and laser science, but not all of them are good reasons. A number of them is discussed in this article.
Regular expressions are very powerful tools for searching in text files, for replacing text and for checking whether inputs are in accordance with certain standouts. Although it is not easy to learn the full functionality of this mechanism, it can be very worthwhile to learn at least the basics. Software from RP Photonics also supports regular expressions, and this very much facilitates e.g. the processing of input data files.
A new presentation, which is also available as a video, explains in detail how a transparent laser can be realized in the form of a computer model, and how that can be used in practice to support the development of lasers in industry and science.
In our new software RP Fiber Power V6, the typical trade-off between ease of use and flexibility has been removed: one can have custom forms made for specific applications - made either by the users or within the technical support.
Different methods for propagating laser beams in physical models are discussed. Depending on the situation and what is of interest, very different kinds of models can be appropriate.
RP Photonics now offers temporally limited software licenses, which may be useful e.g. if the software is needed only for limited time, if only a limited amount of money is available at a time, or if somebody wants to very thoroughly test the software before definitely deciding for it.
Using software from any third party requires substantial trust. This article discusses what aspects are relevant in this context and how to form an opinion on whether such trust is justified.
This article gives some useful tips for the use of the script language in software from RP Photonics. In particular, it explains the difference between commands and expressions, the use of control structures in expressions in the order of execution in scripts.
This article gives an overview on typical problems and limitations for numerical modeling projects in the context of laser technology.
RP software usually comes as 32-bit code. However, a 64-bit version is available to any customer having at least two user licenses for certain product. Advantages of 64-bit versions are that one can use any amount of main memory and that the code is often significantly faster.
This article explains when and how a physics model can be useful in research and development, and what aspects are relevant in this context. The proper role of software in physics modeling is discussed, and some advice based on practical experience is given.
RP Photonics now offers the RP Fiber Calculator PRO software - an improved version of the free RP Fiber Calculator product.
RP Photonics published a new fiber optics software and allows the free use even for commercial purposes. The software can calculate fiber modes from index profiles and simulate light propagation in fibers.
Here we explain how you can move our software to another PC. Essentially, you need to deactivate the license on the old PC in order to prove that you are no longer using it there.
RP Photonics has published new video, which gives a complete overview on the software RP Fiber Power V5.
This post explains how the processing of mathematical expressions works in the script language of software by RP Photonics. Although the user does not need to know that, it may be interesting to look behind the scenes.
Today we report about the new V5 of the RP Fiber Power software. It allows one to numerically simulate the wave propagation in fibers and other waveguides.
Here, we explain improvements of RP Software, which are available as updates, our update and upgrade policy, and how updates are done.
The validation of numerical simulation software, e.g. for simulating the performance of fiber amplifiers and fiber lasers, is a great challenge. The article discusses various aspects which need to be validated, and shows that very different means are required. The comparison between calculated and experimental results is only one part of the game.