Raman laser

Raman laser

The Raman laser is a byproduct of Raman scattering, discovered in 1928 by Nobel laureate Chandrasekhara Venkata Raman and Kariamanickam Srinivasa Krishnan in liquids and independently by Grigory Landsberg and Leonid Mandelshtam in crystals. When light hits a substance, it causes the atoms in the substance to vibrate sympathetically. The collision of photons with the substance causes some of the photons to gain or lose energy, resulting in a secondary light of a different wavelength. A Raman laser takes this secondary light and amplifies it by reflecting it and pumping energy into the system to emit a coherent laser beam.

In 2002, researchers at UCLA demonstrated Raman light emission from optical wires on a silicon chip and in 2004 they demonstrated the first silicon laser. In February 2005, researchers at Intel demonstrated the second generation of such lasers that are capable of operating in continuous-mode on silicon chips. It is expected that these breakthroughs will greatly reduce the cost of optical computing and communications devices by 2010. Because of its crystalline structure, silicon atoms readily vibrate when hit with light. The Raman Effect is 10,000 times stronger in silicon than in glass.

In 2007, researchers at JPL/Caltech have also discovered Raman lasing with fluorite resonators, demonstrating record low threshold and high efficiency.

The Raman effect can lead to higher energy photon emission, or, more usually, to lower energy photon emission.

External links

* [http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-21-5269 Demonstration of a silicon Raman laser] , by Ozdal Boyraz and Bahram Jalali.
* [http://www.sciam.com/article.cfm?id=making-silicon-lasers Making silicon lasers] , by Bahram Jalali
* [http://www.nature.com/nature/journal/v433/n7027/full/nature03346.html A continuous-wave Raman silicon laser] , by Haisheng Rong, Richard Jones, Ansheng Liu, Oded Cohen, Dani Hak, Alexander Fang and Mario Paniccia
* [http://www.opticsinfobase.org/abstract.cfm?URI=ol-32-2-166 Ultralow-threshold Raman lasing with CaF2 resonators] , by Ivan Grudinin and Lute Maleki.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Raman laser — Ramano lazeris statusas T sritis fizika atitikmenys: angl. Raman laser; Raman effect laser vok. Raman Effekt Laser, m; Raman Laser, m rus. комбинационный лазер, m; рамановский лазер, m pranc. laser à effet Raman, m …   Fizikos terminų žodynas

  • Raman-Laser — Ramano lazeris statusas T sritis fizika atitikmenys: angl. Raman laser; Raman effect laser vok. Raman Effekt Laser, m; Raman Laser, m rus. комбинационный лазер, m; рамановский лазер, m pranc. laser à effet Raman, m …   Fizikos terminų žodynas

  • Raman-Laser — Grundlagen des Raman Faserlasers Ein Raman Faserverstärker funktioniert vergleichbar mit einem normalen optischen Verstärker, basiert aber auf dem nichtlinearen Raman Effekt. Die Energie eines eingekoppelten Pumplichts wird über eine bestimmte… …   Deutsch Wikipedia

  • Raman-Laser mit elektronischer Frequezabstimmung — elektroniniu būdu derinamas Ramano lazeris statusas T sritis radioelektronika atitikmenys: angl. electronic tunable Raman laser vok. Raman Laser mit elektronischer Frequezabstimmung, m rus. перестраиваемый лазер на комбинационном рассеянии, m… …   Radioelektronikos terminų žodynas

  • Anti-Stokes-Raman-Laser — antistoksiškasis Ramano lazeris statusas T sritis radioelektronika atitikmenys: angl. antistokes Raman laser vok. Anti Stokes Raman Laser, m rus. антистоксов лазер комбинационного рассеяния, m pranc. laser Raman anti Stokes, m …   Radioelektronikos terminų žodynas

  • antistokes Raman laser — antistoksiškasis Ramano lazeris statusas T sritis radioelektronika atitikmenys: angl. antistokes Raman laser vok. Anti Stokes Raman Laser, m rus. антистоксов лазер комбинационного рассеяния, m pranc. laser Raman anti Stokes, m …   Radioelektronikos terminų žodynas

  • electronic tunable Raman laser — elektroniniu būdu derinamas Ramano lazeris statusas T sritis radioelektronika atitikmenys: angl. electronic tunable Raman laser vok. Raman Laser mit elektronischer Frequezabstimmung, m rus. перестраиваемый лазер на комбинационном рассеянии, m… …   Radioelektronikos terminų žodynas

  • Spinflip-Raman-Laser — sukininis Ramano lazeris statusas T sritis radioelektronika atitikmenys: angl. spin flip Raman laser vok. Spinflip Raman Laser, m rus. комбинационный лазер с переориентацией спинов, m pranc. laser Raman à réversion des spins, m …   Radioelektronikos terminų žodynas

  • spin-flip Raman laser — sukininis Ramano lazeris statusas T sritis radioelektronika atitikmenys: angl. spin flip Raman laser vok. Spinflip Raman Laser, m rus. комбинационный лазер с переориентацией спинов, m pranc. laser Raman à réversion des spins, m …   Radioelektronikos terminų žodynas

  • RAMAN (EFFET) — L’effet Raman est un phénomène physique de diffusion moléculaire de la lumière, mis en évidence expérimentalement en 1928 par le physicien indien Chandrasekhara Venkata Raman, lauréat du prix Nobel en 1930. Dès les premiers travaux se sont… …   Encyclopédie Universelle

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”