However, this does not diminish the book's value. Optical communication is a field built upon foundational principles. The physics of total internal reflection, the mathematics of the wave equation, and the statistical nature of photon detection have not changed. Gowar provides the immutable laws that govern these systems. While a modern engineer must supplement this reading with current research on Optical Transport Networks (OTN) and fiber-to-the-home (FTTH) technologies, Gowar provides the bedrock upon which that modern knowledge is built.
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Gowar begins with Maxwell’s equations, applying them to waveguides. He distinguishes between: However, this does not diminish the book's value