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Ultraviolet Thulium Laser

#G-429


Selectively Pumped Ultraviolet Tm3+ Doped Solid Lasers

Tech Area / Field

  • PHY-OPL/Optics and Lasers/Physics

Status
3 Approved without Funding

Registration date
14.11.1999

Leading Institute
Institute of Cybernetics, Georgia, Tbilisi

Supporting institutes

  • Institute of General Physics named after A.M. Prokhorov RAS, Russia, Moscow\nTbilisi State University, Georgia, Tbilisi

Collaborators

  • Lawrence Livermore National Laboratory, USA, CA, Livermore\nLawrence Livermore National Laboratory / Laser Science and Technology, USA, CA, Livermore

Project summary

The main goals of purposed work are following:
1. Evaluation of realization possibility of laser generation in UV (ultraviolet), Visible and IR (infrared) spectral range of RE (rare-earth) doped crystals, glasses using step by step mechanism excitation of active centers.
2. Realization of effective generation in UV spectral range for the YAG:Tm3+ and YLF:Tm3+ systems glasses using step by step mechanism excitation of active centers.
2.1 To get high energy output of UV laser with using an efficient scheme of selective pumping.
2.2 To improve the generation characteristics of selectively pumped 2.34m YAG:Tm3+ and YLF:Tm3+ lasers.
2.3 Realization of Q-switching and CW laser operation.
2.4 To develop pump unit using laser diodes.
2.5 To develop air cooling system.
3. To study spectroscopy and luminescence properties of RE doped crystals and glasses and further investigations of the effective schemes of selective pumping for RE doped materials.

A modern tendency in development of solid state lasers is to use laser diodes as new pump sources. The most important peculiarities of diode pumping are the spectral selectivity and high radiation density, the latter producing high concentrations of the excited particles via the linear and nonlinear mechanisms of excitation. Therefore the huge opportunity of different selective schemes of pumping for realization of the laser effect in RE doped active elements appears. During the flashlamp pumping of RE ions the process of formation of inversion of population is inoperable. Situation is radically changed under the selective pumping conditions, in this case occurs purposeful excitation of activators and the density of created phonons is negligible low then density of stimulant and (or) emitting photons. Therefore, quantum efficiency increased and the water-cooling system may not be used.

The reliability, compactness, non-toxicity and high efficiencies offered by solid state lasers provide many advantages over other coherent ultraviolet sources such as frequency doubled dye laser. Applications may be also rendered more practical with an all solid state UV source in inhospitable environments.

The luminescence characteristics of RE doped active elements with persiform schemes of selective pumping allows to realize the laser effect as in IR so in Visible and UV spectral ranges. Proposed results will pursued for application to data storage, printing, advanced scientific instrumentation, communication (2-2.5m atmospheric window), biology and medicine. Proposed outcomes of the Project provide to weapon scientists and engineers the opportunity for peaceful scientific and research activity.

The leading scientists participating in the project have wide experience in quantum electronics. At different time they worked in the leading centers of former Soviet Union (General Physics Institute, Moscow) and former German Democratic Republic (University of Jena, Jena).

Consistent with the scope of activities of the project proposal the scope of cooperation with the foreign collaborators will turn out in: information exchange in the course of project implementation; providence of comments to the technical reports (quarterly, annual final, etc.); submitted by project participants to the ISTC; conduction of joint seminars and workshops.

According to the main goals of the project the following technical approach and methodology will be used: the experimental methods of absorption and luminescence spectroscopy; theoretical analysis based on solution of rate equations; computer simulation.


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The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.

 

ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.

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