- 148 pages
- English
- PDF
- Available on iOS & Android
About this book
In short-range communication 1 mm step-index polymer optical fiber (SI-POF) established itself as a reasonable alternative to the traditional data communication media. The commercial systems with SI-POF use a single wavelength for data transmission. This thesis investigates the utilization of several optical carriers for parallel transmission of data channels over a single fiber, known as wavelength division multiplexing (WDM), in order to increase the capacity of SI-POF link. The focus of research is on (1) demultiplexing techniques for SI-POF, (2) high-speed WDM transmission over SI-POF and (3) channel allocation for POF WDM systems.For WDM an optical demultiplexer is a key component. The thesis concentrates on the demultiplexing techniques employing thin-film interference filters and a concave diffraction grating. A four-channel interference filter-based SI-POF demultiplexer was realized using a precisely adjustable opto-mechanical setup. It provided low IL ( 30 dB), outperforming other interference filter-based SI-POF demultiplexers reported so far. Theoretical and experimental analysis of an already realized SI-POF demultiplexer based on a concave diffraction grating was carried out. The results confirmed the wavelength separating function of the device. However, a poor grating quality due to unstable parameters of the ruling process led to high IL (> 20 dB) and low channel isolation (< 15 dB). To demonstrate experimentally the feasibility and potential of a high-speed POF WDM concept, a four-channel laser diode-based data transmission setup employing the interference filter-based demultiplexer was realized. It was shown that POF WDM with lower channel rates and simple transmission technique could provide aggregate bit rates comparable to those achieved with the single-wavelength systems that used more advanced transmission techniques but required more signal processing. In addition, the record 14.77 Gb/s and 8.26 Gb/s data rates employing the offline-processed discrete multitone modulation were demonstrated over 50 m and 100 m SI POF, respectively. Compared to the fastest single-wavelength systems, two times higher transmission capacities were achieved.Finally, the channel allocation for POF WDM systems was investigated. It was shown that the extension of ITU-T G.694.2 Coarse WDM grid into the visible spectrum, with 15 channels and 20 nm channel spacing, is best suited to support WDM applications over SI-POF.
Frequently asked questions
- Essential is ideal for learners and professionals who enjoy exploring a wide range of subjects. Access the Essential Library with 800,000+ trusted titles and best-sellers across business, personal growth, and the humanities. Includes unlimited reading time and Standard Read Aloud voice.
- Complete: Perfect for advanced learners and researchers needing full, unrestricted access. Unlock 1.4M+ books across hundreds of subjects, including academic and specialized titles. The Complete Plan also includes advanced features like Premium Read Aloud and Research Assistant.
Please note we cannot support devices running on iOS 13 and Android 7 or earlier. Learn more about using the app.
Information
Table of contents
- Acknowledgements
- Abstract
- Table of contents
- 1 Introduction
- 2 Fundamentals of WDM for short-range communication over POF
- 3 POF demultiplexer employing thin-film interference filters
- 4 POF demultiplexer based on a concave diffraction grating
- 5 Four-channel POF WDM transmission experiments
- 6 Spectral grids in the visible spectrum for POF WDM applications
- 7 Summary and outlook
- References
- List of abbreviations
- List of publications