Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Playing billiards with light provides cheaper lasers

24.06.2003


Dutch physicists from Leiden University have made an experimental laser that combines the advantages of two types of laser. With the experimental laser, which generates light in a sort of billiards table with round edges, the researchers have demonstrated that is possible to produce cheaper lasers.



A conventional laser reflects light between two very accurately positioned mirrors, the so-called resonant cavity. The distance between the mirrors determines which wavelength is amplified and therefore which colour of light remains. Conventional lasers are expensive due to the costs of the mirrors. This is because the mirrors in a laser have to be very accurately curved. Furthermore, the form and the quality of the mirrors must satisfy stringent technical specifications and the distance between the mirrors has to be set and maintained with extreme precision.

The ’’random laser’’ provides an alternative. Such a laser is much less sensitive to technical imperfections of the resonant cavity, for example. A random laser works with a large number of different light colours. Up until now this type of laser has worked using light-diffusing particles and this has a number of disadvantages. Physicists would prefer such lasers to make use of mirrors.


Jos Dingjan’s doctoral research contributed to the successful construction of an experimental random laser that works with mirrors. The resonant cavity consists of three standard mirrors which produce a resonant cavity in the form of a billiards table with ’’round’’ corners. The mirrors are easily placed in a variety of set-ups on an experimental table. This enables the researchers to perform a wide range of experiments.

The middle mirror, half way along the radiation passage of the light, is located almost perpendicularly. This causes the necessary disruption to the light waves. The desired wave chaos was found to arise at the third mirror. With the addition of a light amplifier a laser beam can in principle be generated here.

Nalinie Moerlie | alfa
Further information:
http://www.nwo.nl

More articles from Physics and Astronomy:

nachricht APEX takes a glimpse into the heart of darkness
25.05.2018 | Max-Planck-Institut für Radioastronomie

nachricht First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>