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The recent trends in optical communications are changing very quickly. It is quite amusing to see that the core of every large communication network carries huge traffic every now and then, which was very much unrealistic 20 years ago. This would not have been possible without optical fibers. With the changes in the demand and availability of the new technologies, new frontiers are being added to the main fiber-optic technologies. Now, there are so many emerging technologies in this list, such as the visible-light communication, wireless-optical communications, all-optical computing, intelligent and automated-optical networking, and software-defined optical networking. Furthermore, there are several new initiatives in the optical field outside of telecommunication. In the future, it will be more advanced and diversified with new applications and trends. One day, it may be possible that the whole static communication …