3-channel Laser System

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With the intensive technological progress, the atmospheric monitoring has become one of the most important issues for the absolute majority of states in their environment protection activity.
The acquisition of on-line information about the state of the atmospheric layer is an integral part of both global and regional atmospheric monitoring.
LIDAR systems using laser radiation sources are often integrated into the systems of atmospheric monitoring.

The given three-laser system (two Ti:Sapphire lasers and one Nd:YAG laser) is designed for application in a mobile distant atmosphere monitoring complex as a radiation source. To determine chlorine, nitrogen dioxide or ozone in the atmosphere the differential method for detection of the second and third harmonics of Ti:Sapphire lasers on the set wavelengths in the first and the second channels of laser system is used. Radiation of the second harmonic of Nd:YAG laser in the third channel is used for probing of aerosol formations, and the third harmonic radiation is used as an auxiliary one at chlorine detection.

Two Ti:Sapphire lasers being tuned for the selected ranges of wavelengths generation and the generator of the 3rd harmonic of Nd:YAG laser are pumped by the subsequent switching (for three channels) with a rotary galvanic-drive mirror of each radiation pulse generated by Nd:YAG laser. The design of Nd:YAG laser supports the opportunity of automated tuning the parameters of the input radiation for the maximal conversion in the 3rd harmonic (355 nm) or for the most effective pumping of Ti:Sapphire lasers.

Radiation beams are converged parallel and transmitted to the telescope-expander.

 

Features

  • Three switchable channels of laser radiation generation
  • Frequency of channel switching is up to 20 Hz
  • Wide spectral range (from 240 up to 1064 nm)
  • Narrow–line radiation generation (up to 0.1 nm)
  • Wide range of output energies (from 4 up to 860 mJ)
  • Automated setting and control over the parameters of each pulse
  • Online control over the wavelength of each radiation pulse in all channels
 

 

SOL instruments: спектрометр, рамановский микроскоп, эмиссионный спектрометр. fig1 Lidar 3-ch system