Details

Autor(en) / Beteiligte

• Günter Danielmeyer, Hans
• Queisser, H. J.

Titel

Stoichiometric laser materials

Ist Teil von

• Festkörperprobleme 15, 2007, p.253-277

Ort / Verlag

Berlin, Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This is an introduction into the physics, problems properties, and applications of stoichiometric laser materials. They can store several kilojoules of energy per cm3 for times ranging from 100 ns to 10 ms. Continuous room temperature laser operation can be achieved with just a few hundred microwatts of pump power. Optical gains up to 10 dB per optical wavelength can be expected. The physics involved in stoichiometric systems is described and related to spectroscopic properties. Threshold, pump power, and dynamical behavior (relaxation oscillations) are calculated including the effects of anisotropy, saturation, inversion profile, reabsorption, pump profile, and mode profile—effects that are important for materials with a high concentration of active ions. Structural aspects such as phase transitions, ferroelasticity, ionic spacings, probability density of rare earth electrons, and energy transfer are discussed using NdP5O14 as an example. Hybrid exchange is proposed as a possible mechanism for energy transfer between rare earth ions. Their wavefunctions overlap appreciably in stoichiometric materials. Examples are given of existing materials and of their applications.