It sounds like you're looking for a more detailed explanation or "long story" about why John Gowar's Optical Communication Systems is considered a better or highly regarded textbook in the field, and perhaps where to find a PDF.
Gowar’s work focuses on the physical limitations that dictate how far and how fast data can travel through a fiber. Optical communication systems : Gowar, John, 1945 optical communication systems john gowar pdf better
The search for "optical communication systems john gowar pdf better" reveals a universal truth: students want clarity over coverage. They want to understand before they memorize. John Gowar delivers that better than almost any other author in the field. It sounds like you're looking for a more
Here’s the full background.
2. Exceptional Pedagogy for Self-Study Unlike standard reference manuals, this book was written as a teaching tool. They want to understand before they memorize
Gowar flips the script. He introduces the power budget and rise-time budget within the first 100 pages. He forces the reader to ask the engineering question: “Given a transmitter and receiver, how far can I send data?” This top-down approach is pedagogically superior. You learn the physics because you need it to solve the budget, not the other way around.