What you will learn:
You'll learn how DWDM technology allows dozens of separate wavelengths to share a single fibre, understand how optical amplifiers compensate for fibre loss over long distances, appreciate the causes and methods of compensating for dispersion, and discover how coherent optical transmission is enabling terabit-per-second links in modern networks.
By the end of this course you will be able to:
- describe the role of optical line terminals (OLT).
- describe the principles and applications of optical amplifiers as repeaters, power boosters and pre-amplifiers.
- describe the principles and applications of the various forms of wavelength division multiplexing (WDM) inc. wideband WDM, narrowband WDM, Coarse WDM (CWDM) and Dense WDM (DWDM).
- describe the characteristics and capabilities of the optical interfaces recommended by the ITU for use in SDH networks and optical transport networks (OTNs).
- describe and compare the capabilities of the Ethernet interfaces specified by the IEEE for long-haul optical links.
- describe the characteristics and capabilities of the optical interfaces designed for use with data centre interconnects (DCI) inc. 400ZR.
- describe the characteristics and applications of various types of single mode optical fibre.
- describe and compare the advantages of the various methods of increasing the capacity of a link with reference to DWDM, polarisation multiplexing, inverse multiplexing, and multi-state modulation.
- describe methods of reducing the effects of dispersion on high bit rate optical links.
- describe and compare the principles, benefits, and applications of various types of multi-state modulation inc. QPSK, PAM, and QAM.
- describe the principles and benefits of coherent detection and its role in ultra-high speed communications.
Course prerequisites:
An understanding of the basic principles of modulation, multiplexing and optical fibre principles. It is recommended that the PTT online courses "Modulation and multiplexing" and "Optical fibre principles" are studied before attempting this course.
Approximate study time: 6 hours
Delivery platform requirements:
To access the course, a computer/tablet running a browser such as Chrome, Safari, Edge etc. is required. The device should have an active Internet connection and a screen resolution of at least 1024x768.