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.
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 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
|
|
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 |
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 |
Beam divergence, max.: | 0.2 mrad |
Telescopes: |
8х achromatic |
Length between optical axises of the channels: |
350 mm |
Pulse duration (1064 nm): | 12 - 14 ns |
Pulse repetition rate: | 10 Hz (20 Hz) |
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 |
Power supply requirements: | one phase, 220В ±20%, 50-60 Hz, 1850 W (max) |
External synchronization: | TTL level (+5 V) |
Laser head: | 1500 x 1200 x 250 mm, 385 kg |
Power supply and cooling system: | 420 x 510 x 1080 mm, 96 kg |