Joensuu summer school on optics

32nd Joensuu Summer School on Optics 2022: Glasses for optical fibres and other applications

The Summer School, Glasses for optical fibers and other applications is a part of the International Year of the Glass 2022.

Poster for Joensuu Summer School on Optics 2021

Download the course program:
The summer course time table and the program 2022

Category: Optics and material science
Event Type: Lectures, short tasks and visits to two industrial companies
Country: Finland
City: Joensuu
Start Date: 09.08.2022
End Date: 16.08.2022
Organizers: Institute of Photonics – University of Eastern Finland, Photonics Research and Innovation PREIN flagship, Photonics Center and Photonics Finland

Teachers: Ass. Prof. Tarja Volotinen and Prof. Laeticia Petit, Tampere University
Course contact person: Ezekiel Kuhoga, UEF

Where: Lectures in Metria building (Yliopistokatu 7, 80100 Joensuu). Visits to companies.
Duration: 6 working days i.e. ca. 27h of studies (9.8.-12.8.2022 and 15.8.-16.8.2022)
Credit points:  2 ECTS
Teaching language: English
Level: Master level studies

Application instructions and participation fees information is available on the webpage: Applying and participation fees of UEF Summer School | University of Eastern Finland

Instructions for course registration will be available in UEF Summer School webpage:


An industrial work career for physicist: what are the interesting parts of it, what are the heaviest tasks, and how to get through and learn to solve problems and  improve products and production methods; introduction to solid-state materials and their properties; material compositions and manufacturing methods of glasses for various types of products (windows,  high strength materials, vessels, glass cover of ceramic materials and electronic components, etc.);  how the recycled glasses are used and their benefits;  coloured glasses;  glass in optical fibres; coating materials of optical fibers,  manufacturing method for optical fibres; communications optical fibres and fiber components and their optical and mechanical properties; history and problems solved in the communications fibres 1976-2020; characterization and measurement methods for fibers and fiber components;  splicing methods and manufacturing of fiber components; specialty optical fibers, fiber lasers and amplifiers; photonics materials, examples of active glasses; two visits to industrial companies: a fibre and glass product factory (Oplatek at Leppävirta) and a photonics material  & component factory; discussions with and short task reports to the students.

Learning outcomes: After completing the course, the student is expected to understand
• how the industrial companies are functioning
• what kind of tasks and challenges physicists perform and face respectively in industry
• where to get help, when you must solve a new problem to which there is no prior solution
• the types of solid-state materials and their properties and differences, including glass
• manufacturing methods of glasses, their material composition and properties, and how the properties depend on the composition and manufacturing process
• ways to make coloured glasses
• optical and photonic properties of glasses, and the measurement methods of them
• the materials in optical fibers, both glass and coatings, and the special properties and manufacturing methods of optical fibers
• the types and properties of communications fibers, the measurement methods and international standards
• the fiber splicing methods and methods to manufacture fiber components (splitters etc.)
• which “childhood” problems optical fibers had in a few tens of years ago, and how the problems were solved out
• about which optical and mechanical reliability problems are possible to appear in fibers, and how to avoid them
• how fiber lasers and amplifiers are manufactured, their properties and other types of specialty optical fibers
• about photonic materials and photonic glasses, which functions are so far available to be made into glasses, and how.

Modes of study: Attendance to the lectures, discussions and visits to industrial companies, lecture material (PDF-file), completing the short task reports.
Teaching methods: Lectures and related assignments, meetings in a lecture hall and visits to two factories.
Learning material: Lecture notes available; recommended books and publications (available during lectures) and discussions with the lecturer.
Evaluation criteria: Accepted/Not accepted, based on the active attendance and the return of the short reports.
Prerequisites: Elementary physics, basic knowledge of optics/photonics and chemistry or material science.
Offering data: This course is intended for the following student groups:
• Optics-photonics major students or material science students,
• Industry physicists, and
• To Industrial physicists and engineers who wish to improve their understanding of glass- and photonics materials and optical fibers.

Recording: Lectures will not be recorded

Tarja Volotinen:
Ezekiel Kuhoga:; +358 50 46 12 558


Glass is used as a material in many home vessels and items which are familiar to many if not everyone.

Glass windows are a natural part of modern buildings.

The fiber brunch (A. Extance, Fibre Systems, 2021, 32, pp. 22- 24). The glass in optical fibres must be optimized so the fibres function properly and in an economic way

As the signals travel in optical fibres they become weaker due to dispersion and absorption – this is called attenuation. The stronger the attenuation the more amplifiers are needed. The attenuation depends on the used wavelength and the properties of the glass. How can the attenuation be minimized?



Previous summer school courses

Joensuu Summer School on Optics courses since 1995:

1. Diffractive Optics, Dr. Frank Wyrowski and Prof. Toyohiko Yatagai, 2ov, 1995, 22 participants
2. Quantum Optics, Prof. Stig Stenholm, 2 ov, 1996, 15 participants
3. Optical Communication, Prof. Seppo Honkanen, 2 ov, 1996, 15 participants
4. Fourier-transform spectroscopy, Prof. Jyrki Kauppinen, 2ov, 1997, 23 participants
5. Optical System Design, Dr. Janusz Sadowski, 2 ov, 1998, 25 participants
6. Modern technologies in Optics and Optoelectronics, in cooperation with Infotech Oulu in Saariselkä, 2 ov, 1999, 35 participants
7. Crystal Optics, Prof. Alexei A. Kamshilin, 2 ov, 1999, 16 participants
8. Color and Color Image Analysis, Prof. Jussi Parkkinen, 2 ov. 2000, 43 participants
9. Classical Coherence Theory, Prof. Jari Turunen, 2 ov, 2000, 27 participants
10. Polarization of Light and Non-Linear Spectroscopy, Dr. Yuri Svirko, 2 ov, 2001, 21 participants
11. Engineering of Appearance Reproduction, Dr. Norimichi Tsumura, 2 ov, 2001, 12 participants
12. Introduction to Signal Analysis, Prof. Dinesh Kant Kumar, 2 ov, 2002, 19 participants
13. Optical Interferometry, Prof. I. Yamaguchi, 2 ov, 2002, 16 participants
14. A practical course in Optical Communications, Dr. Georg Mohs, 2 ov, 2003, 11 participants
15. Modern microscopy, Prof. Colin Sheppard, 2 ov, 2004, 13 participants
16. Design of Consumer Optics, Prof. Jyh-Long Chern, 4 ECTS, 2005, 27 parrticipants
17. Femtosecond laser micromachining, Prof. Peter Balling, 4 ECTS, 2006, 20 participants
18. Introduction to terahertz spectroscopy, Prof. Roy Shimano, 4 ECTS, 2007, 19 participants
19. Nanocarbon Photonics and Optoelectronics (NPO2008), 2008
20. Koli Workshop on Partial Electromagnetic Coherence and 3D Polarization, 2009
21. Summer School on Photonic Telecommunication Systems, Profs. Seppo Honkanen and Franko Küppers, 3 ECTS, 2010, 11 participants
22. Summer School on Color, Imaging and Information, Prof. David Foster, 3 ECTS, 2011, 29 participants
23. Quantum Light & Matter, Profs. Mackillo Kira and Ilkka Tittonen 4 ECTS, 2012, 12 participants
24. Tissue Optics and Measurements in Biophotonics, Dr Alexey Popov and Prof. Valery Tuchin, 2 ECTS, 2013, 30 participants
25. Optical Metrology and Fabrication, Prof David J Robertson, 2 ECTS, 2014, 20 participants
26. Printed Electronics and Photonics, Prof. Ghassan Jabbour, 2 ECTS, 2015, 21 participants
27. Organic Optoelectronic Devices, Prof. Alexander Zakhidov, 3 ECTS, 2016, 18 participants
28. Optical Engineering: Understanding Optical System by Experiments, Dr. Toralf Scharf and Dr. Myun-Sik Kim, EPFL, Switzerland, 3 ECTS, 2017, 22 participants
29. Methods and tools for effective Quality improvements using Lean and Six Sigma, Tero Ollikainen, 3 ECTS, 2018, 18 participants
30. Joensuu Summer School on Optics 2019: eXpeRience your reality, various lecturers, 2-5 ECTS, 2019, 52 participants
31. Cancelled: 31st Joensuu Summer School on Optics 2020: Hyperspectral Imaging
31. Joensuu Summer School on Optics: Hyperspectral Imaging