Data, with the able assistance of the black hat hacking community, is constantly trying to escape the confines of its various containers while information security professionals everywhere are vigorously trying to stem its illicit flow. In the late 1960s, an increasingly controversial facet of this struggle piqued the U.S. government's interest, and it created the TEMPEST program to address the information security implications of data leakage through spurious electromagnetic and acoustic emissions.
Fiber Optic systems are pretty forgiving, especially when compared to copper systems. That being said, it's always good practice to have a handle on your Power Budget, Loss Budget and Performance Margin when working with an optical system. Even if you rely on trained professionals to handle your structured cabling, it's a good idea to understand these concepts - after all, knowledge is power.
In 2009 the ITU (International Telecommunication Union) introduced, ITU G.652.D as an industry recommendation which defines a full-spectrum, low water peak, singlemode fiber - basically most single mode fiber used in the past 5 years. This improvement in fiber performance opened the door for the proliferation of Coarse Wave Division Multiplexing (CWDM Mux) and other long wavelength technologies.