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April 3, 16.15, 2008, F219, Zellu 8: Frontiers in Optics 2007, Plenary Session video
March 6, 16.15, 2008, F219, Zellu 8: Interview with Richard Feynman "The Pleasure of Finding Things Out".
February 3, 16.15, 2008, F219, Zellu 8: Optical computer mice.
by Arturs Cinins
Nowadays well-known mechanical mouse has been almost completely replaced by optical and laser mice. While operation of mechanical mouse is well explained, principle of operation of optical mouse still remains as a secret for ordinary people.
In this speech principles of operation and most important components of optical mouse will be inspected. We will try to understand main reasons why optical and laser mice are better than mechanical ones, and why optical mouse can not operate properly on transparent and glossy surfaces.
January 21, 16.15, 2008, F219, Zellu 8: Gravity waves.
by Juris Ulmanis
December 17, 16.15, 2007, F219, Zellu 8: Dark matter.
by Florian Gahbauer
It is generally accepted that a large fraction of the Universe consists of dark matter, but its constitution remains a mystery. This talk will describe the evidence for dark matter, various dark matter candidates, and some experiments that are searching for dark matter. Finally, an experiment will be described, which searches for evidence of dark matter in the cosmic rays.
December 3, 16.15, 2007, F219, Zellu 8: Vertical-cavity surface-emitting laser.
by Andreass Sulcs
November 29, 16.15, 2007, F219, Zellu 8: Optical Atomic Clocks.
by Artis Kruzins
Developments in Optics and Communications 2008: video
Maksim Polakov. Micro-Raman Spectra of Blood
Roberts Paeglis. Formatting of Pages
Sergejs Fomins. Masking study of instant stimuli texture segmentation
Jurgis Grube. Temperature effects in up-conversion processes for erbium - ytterbium doped oxyfluoride silicate glass
Richard W. Peterson. Favorite Lecture Demonstrations
Linards Kalvans. Survey of Cs D1 hyperfine transitions
Juris Ulmanis. Diode pumped single frequency Nd:YVO4 laser amplifier
Reinis Taukulis. Interferometer for nanometric displacement sensing
Martins Bruvelis. Magneto-Optical trap for Sodium atoms
Janis Alnis. Improved measurement of the 2S level hyperfine structure splitting
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by Linards KalvansIn the end of the 20th century techniques to slow down and even store a light impulse was proposed by physicists. In the following years a lot of theoretical and experimental research has been done, it is supposed to be very useful in enhancing the existing classical optical communication networks as well as in developing upcoming networks of quantum communications. Read more ... |
by Florian Gahbauer.Nowdays lasers can be found everywhere including optical drives, various gauges and in the simplest breloques. Usually they are bought from industrial manufacturers but there is a subculture of people who make their own lasers, consisting of components found at home or even at dumpsites. Some of them are ready to share their experience over the internet. We will try to understand some of the self-made lasers described in internet and will try to find some new ideas. Read more ... |
by Reinis Taukulis.It is self-evident that traffic jams are causing serious problems to people all over the world. Starting at 1980's physicists were trying to understand how these traffic congestions arise and how to avoid them. There are mainly two ways to tackle this problem - one can consider traffic flow to be similar to some thermodynamic process or one can simply simulate traffic on a computer. Advances in computer technologies allowed to develop simulations that can be used to improve traffic in real life. Read more ... |