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Powerful Infrared Laser

#1206


Powerful IR Lasers with Controllable Spectral, Spatial and Temporal Parameters

Tech Area / Field

  • PHY-OPL/Optics and Lasers/Physics
  • MAT-SYN/Materials Synthesis and Processing/Materials

Status
8 Project completed

Registration date
22.01.1998

Completion date
16.05.2003

Senior Project Manager
Horowicz L

Leading Institute
Institute of General Physics named after A.M. Prokhorov RAS, Russia, Moscow

Supporting institutes

  • Siberian Branch of RAS / Institute of High Current Electronics, Russia, Tomsk reg., Tomsk\nVNIIEF, Russia, N. Novgorod reg., Sarov

Collaborators

  • Photonic Associates, USA, NM, Santa Fe\nPhotonic Associates, США, NM, Santa Fe

Project summary

The following problems are planned to be solved during the work under the present project:

A1. Investigations of action of the processes initiating chemical reactions on the amplitude and temporal characteristics of hydrogen fluoride HF and deuterium fluoride DF laser radiation and that of the method and pumping scheme on the amplitude and temporal characteristics of carbon dioxide CO2 and xenon Xe lasers.

А2. Theoretical investigation of chemical and plasma-chemical kinetics of the laser-active media and the possibilities of control over duration and pergence of the laser radiation pulses. Theoretical investigation of the action of pulsed infrared (IR) radiation on metals and plasma.

A3. Development of four powerful laser setups (CO2 - laser (10.6 and 9.4 mm), HF-laser (3.8 mm), DF-laser (2.8 mm) and Xe-laser (2.65; 2.63; 2.03; 1.73 mm)) with controllable temporal and spatial radiation parameters.

A4. Test of various ways and systems for formation of laser radiation beams with high quality, including generator-amplifier systems. For management of the spatial characteristics of laser radiation it is supposed to investigate influence of various types of resonators to a pergence of radiation, as well as to study an opportunity of application of methods of nonlinear optics for correction of a wave front set. The various optical circuits for formation on samples of spots of an exposure with the given size and structure of power density distribution will be developed and investigated. Selection of optical systems for radiation patterns formation on targets will be carried out.

A5. Investigation of interaction of laser radiation at different wavelengths with substances.

Realization of the project provides development of laser setups with controllable temporal and spatial radiation parameters at wavelengths of 10.6; 9.4; 3.8; 2.8; 2.65; 2.63; 2.03; 1.73 mm with the following characteristics:


1. Single-pulse operational regime with a pulse duration from 1 to 20 ms (energy E = 50 Joule/pulse for argon-xenon Ar-Xe (l = 2.65; 2.63; 2.03; 1.73 mm) and E = 100 Joule/pulse for HF and DF lasers (l = 3.8 and 2.8 mm respectively)) at an irradiating diameter up to 10 cm and average energy density up to 20 Joule/cm2;
2. Pulse-periodic operational regime (3 laser pulses with a pulse duration of a microsecond and repetition rate up to f = 10 Hz) at an irradiating diameter up to 3 cm and average 2 energy density up to 10 Joule/cm2 for HF/DF lasers;
3. Pulse-periodic operational regime (any number of laser pulses with a pulse duration about t = 200 nanoseconds and repetition rate up to f = 100 Hz) at an irradiating diameter 2 up to 1 mm and average energy density up to 10 Joule/cm2 for HF/DF lasers; E = 0.5 Joule/pulse, f = 100 Hz, pulse duration - variable for Ar-Xe laser and pulsed energy E = 20 Joule/pulse, average power P = l kW, pulse duration - variable for CO2 laser (l = 10.6 and 9.4 mm); for different industrial applications in material processing.

Study of action of laser radiation at different wavelengths and different power density on target surface provides a way of defining optimal regimes for specified type of surface treatment. In particular, the project realization makes possible to develop the means for extending lifetime of details operating at significant mechanical loads and in corrosive mediums, which must leads to improvement in reliability and operation period of different devices.

Potential role of foreign collaborators

During the work under the present project collaboration with scientists from Great Britain, Germany, Netherlands, Japan and USA is suggested. Researchers from SOWERBY RESEARCH CENTER (BRITISH AEROSPACE) - Dr. Graeme Scott (Great Britain), from Institute fur Technische Physik (Stuttgart) - Dr. Willy Bohn (Germany) and from University of Twente - Prof. WJ. Witteman (Netherlands) agreed to be foreign collaborators in the present project. They are familiar scientists and have investigated powerful IR lasers and their applications for a long time. It is suggested that Dr. Willy Bohn, Prof. W.J. Witteman and Dr. Graham Scott will participate in discussions on the results to be obtained. It is planned that during the work some material samples from SOWERBY RESEARCH CENTER (SRC) will be irradiated at experimental laser setups in HCEI and VNIIEF and then tested in SRC.


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