Optical heterodyning in differential tunable CO2 laser systems

被引：0
|
作者：
Boreysho, AS [1 ]
Chakchir, SY [1 ]
Konyaev, MA [1 ]
Konovalov, KA [1 ]
Savin, AV [1 ]
机构：
[1] Laser Syst Ltd, St Petersburg 190005, Russia
来源：
TWELFTH JOINT INTERNATIONAL SYMPOSIUM ON ATMOSPHERIC AND OCEAN OPTICS/ATMOSPHERIC PHYSICS, PTS 1 AND 2 | 2005年 / 6160卷
关键词：
D O I：
10.1117/12.675903
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
Long-wave infrared (LWIR) differential laser systems based on single-frequency pulsed CO2 lasers are used in heterodyne lidars for detection of atmospheric pollutions at extremely far distances. Issues related to control of the two-channel tunable single-frequency CO2 laser system, which includes two pulsed TEA laser and four CW wave-guide CO2 lasers (two injectors and two local oscillators) are discussed. The special hardware and software - Automatic Frequency Control system (AFC) - have been developed for the effective operation in wide spectral range (> 60 lines Of CO2 laser). The main task of this system is to keep optimal ratio between a frequency of the injection laser generation and modes of the TEA laser's resonator. The optimal ratio provides maximal probability of the single-frequency pulse generation taking the TEA chirp into account. Experimental data presented on the temporal and spectral structure of the TEA laser pulse generated with injection of the single-frequency CW radiation.
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页数：14
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