Our website provides a free download of OptSim 3.6. Our built-in antivirus checked this download and rated it as 100% safe. OptSim is categorized as Photo & Graphics Tools. The actual developer of the software is RSoft.
From the developer:
OptSim is RSoft's award-winning software tool for the design and simulation of optical communication systems at the signal propagation level. With state-of-the-art simulation techniques, an easy-to-use graphical user interface and lab-like measurement instruments, OptSim provides unmatched accuracy and usability.
You may want to check out more software, such as BabyaCAD, which might be related to OptSim.