Telecom
I (eucariot) Oliferov was once reading and reached the chapter discussing optical communication technologies. Suddenly, I felt both confused and uneasy, as a huge amount of knowledge was being left behind my interests.
And if you haven't studied optics, like me, you might also have missed the point that WDM isn't just a pair of boxes connected by fiber, transmitting dozens of signals at different wavelengths.
In this series of telecom episodes, we'll uncover the full depths of DWDM—we'll give a general overview of the structure and history of optical communication, examine the physics of the processes, and explain how, thanks to OTN, DWDM is a world unto itself, comparable in diversity to the TCP/IP stack.
In the first episode, we'll take a historical look back and explore how optical networks are structured.
Who:
Dmitry Starykh. Deputy Head of the Scientific Department at T8
Pavel Ostapenko. Engineer at an unnamed telecom operator.
What is DWDM?
Optical radiation. Definition of DWDM.
Characteristic optical communication speeds.
A brief history of the development of fixed-line communications. The historical place of DWDM in the hierarchy of communication systems.
Predecessor Technologies: PDH, SDH
First Use of Fiber Optics in Backbone Communications
Physical Basis of the Technology
Built-in Limitations of the Maximum Capacity of SDH Technology
The SDH Crisis and Gradual Technology Change
CWDM
First Use of the Wavelength Division Multiplexing Principle
Key Physical Components of the Technology (Multiplexers, Heterostructure Lasers)
Built-in Limitations of the Maximum Capacity of CWDM Technology
DWDM (Inception)
Key Components of the Technology (New Lasers, Optical Amplification)
Competing Optical Amplification Technologies
Technological Challenges in Implementing the Selected Solution
DWDM (Evolution)
Revolutionary Leap in Maximum Capacity
Increase in AM Channel Modulation Rates
Dispersion Crisis
Coherent Systems (Basic Idea, Main Physical Challenges, Key Components)
DWDM (Modernity and Trends)
Expanding Applications
Miniaturization
Spectrum Spreading
Flexible Networks
New Fiber Infrastructure
https://linkmeup.ru/podcasts/2472/
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