產品介紹

2-channel laser system

Laser two-channel automated system with the opportunity of simultaneous generation of Nd:YAG harmonics and the 2nd and the 3rd harmonics of Ti:Sapphire lasers with the line width up to 35 pm in each channel on several wavelengths. Each channel contains pumping Nd:YAG laser, Ti:Sapphire laser and achromatized telescope-expander. This is a special implementation for application in a mobile distant atmosphere monitoring complex as a radiation source. It is notable for the complete diagnostics of radiation parameters in each channel, information transfer via optical fiber, high-temperature resistance and mechanical resistance of the construction.

產品說明

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 two-laser system (one 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 laser on the set wavelengths in the first channel of laser system is used. Radiation of the second harmonic of Nd:YAG laser in the second channel is used for probing of aerosol formations, and the third harmonic radiation is used as an auxiliary one at chlorine detection.

 

 

Features

  • Opportunity of simultaneous generation on the several wavelengths
  • Wide spectral range (from 235 up to 1064 nm)
  • Narrow – line radiation generation (up to 35 pm)
  • Wide range of output energies (from 1 up to 650 mJ)
  • Automated setting and control over the output parameters
  • Online control over the energy and the wavelength of each radiation pulse in both channels
  • Thermal and mechanical resistance of the construction; stability of the parameters
  • Completely automated system for measuring of the parameters of each pulse
  • High noise resistance
  • Control and transfer of the information via fiber optics
 

 

SOL instruments: спектрометр, рамановский микроскоп, эмиссионный спектрометр. fig1 Lidar 2-ch system 

產品規格

Lasing parameters

Radiation wavelength:  
Channel I  
Nd:YAG laser: 532 nm, 266 nm

Ti:Sapphire laser

 

fundamental:

700 - 950 nm
second harmonic:

350 - 475 nm

third harmonic:

235 - 315 nm

Channel II

 

Nd:YAG laser:

1064 nm, 355 nm

Ti:Sapphire laser

 

fundamental: 700 - 950 nm
second harmonic: 350 - 475 nm
third harmonic: 235 - 315 nm
Second linewidth (Ti:Sapphire laser): 0.025 – 0.040 nm
Wavelength stability (during the 8 hours of continuous): 0.02 nm
Beam diameter (in front of the output telescope)  
Nd:YAG laser: ≤ 7.5 mm
Ti:Sapphire laser: ≤ 3.0 mm

Output energy

Energy per pulse (before the output telescope):  
1064 nm: 650 mJ
532 nm: 400 mJ
355 nm: 150 mJ
266 nm: 120 mJ
Ti:Sapphire laser  
fundamental: 75 mJ
second harmonic (450 nm): 30 mJ
third harmonic (300 nm): 10 mJ

Spatial capabilities

Beam divergence, max.: 0.2 mrad

Telescopes:

8х achromatic

Length between optical axises of the channels:

350 mm

Temporal capabilities

Pulse duration (1064 nm): 12 - 14 ns
Pulse repetition rate: 10 Hz (20 Hz)

Controlled pulse parameters and measurement accuracy

Pulse energy measurement  
measurement range: 1 - 650 mJ
measurement accuracy: ± 3%
Wavelength measurement  
measurement range: 230 - 959 nm
measurement accuracy:  
700-950 nm: 0.04 nm
350-475 nm: 0.02 nm
235-315 nm: 0.013 nm

Electrical requirements

Power supply requirements: one phase,
220В ±20%, 50-60 Hz, 1850 W (max)
External synchronization: TTL level (+5 V)

Overall sizes, Weight

Laser head: 1500 x 1200 x 250 mm, 385 kg
Power supply and cooling system: 420 x 510 x 1080 mm, 96 kg