OSCAR is an optical FFT code used to calculate the steady state optical field circulating in Fabry Perot cavities. The code can integrate non-sperical mirrors and any arbitrary input fields. Recent applications for OSCAR have been: calculation of thermal lensing effect and calculation of diffraction loss and cavity eigen modes for mesa beams. One great advantage of OSCAR is the simplicity and flexibility of the code, everyone with only minimal knowledge of Matlab can easily modified OSCAR code to suit specific purposes.
OSCAR V1 is included under OSCAR V3, the presentation has changed to make it more robust but the internal motor is still the same.
Everything which can be done with OSCAR V1 can also be done with the V3 (and of course much more).
I should still be able to find the V1 if you really need it.
Hey Jerome, thanks for the awesome code!
Part 1 of the manual deals with OSCAR V1. Do I understand correctly that none of the files discussed in that important section are part of the download here? where can I get them?
OSCAR can simulate linear cavities with an arbitrary number of mirrors. See the file: 'Example_4mirrors.m' for example.
do the OSCAr is useful for another cavity such as ring cavity with three element?
Likely a wrong installation.
I want simulate a ring cavity that have three mirror. but when I tried to simulation, I got error again and again. How can I do it by OSCAR? pleas help me.
I can't define a LG beam...
Cavity with a length of few centimeter must work (with a suitable grid side). Send me by email an example for your file so I can fix it.
does anybody know why the simulation doesnt work if you make the cavity length small in the range of a few centimeters?
the code doesnt crash but it doesnt plot anything..
I have been using this code since a long time, and I really like it. It is easy to use, and most important, easy to customize for many different purposes.
The documentation is clear and well written, and it's the very first paper to be read to easily understand the basic principles of FFT optical codes.
Moreover, Oscar is constantly updated, and the author is always available and responds quickly to any questions.
Very good job!
Really nice job.
Documentation is easy to understand and to follow.
Thanks to the author!
This is a first class job.
I have used Oscar as a foundation for my own code for simulating cavities. It is really very easy to understand the code and there is also a very well written user manual.
Update to keep OSCAR compatible with the newest versions of Matlab.
Implementation of the Zernike polynomials
New functions and bug fixes
It includes now the function to read the .dat from the ZYGO interferometer.
An accelerated convergence scheme has been implemented as well as the possibility to use strong focusing telescope.
Can use a more reliable to propagate the beam and add a new routine to calculate cavity eigen modes.
Can simulate linear cavity with arbitraty number of mirrors. New syntax to define laser beam and Interfaces. Minor bug correction.
The code has been fully rewritten (with Oriented Object Programming) to be faster and more user friendly.
Example to reduce the computational time of OSCAR, better memory allocation of matrices and correct a sign error
Add an example about how to simulate a 3 mirrors ring cavity (also called a mode cleaner).
Added a new example
A little mistake found in the manual
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