Construction, testing of 1-MW nitrogen laser
Abstract
Nitrogen lasers (N2-lasers) have achieved considerable importance since their discovery in 1963. Preferred as pump light sources for nanosecond pigment lasers they are also used in photolysis experiments, fluorescence decay time measurements, in the determination of air pollution, the detection of oil traces or in material processing in semiconductor and microelectronics. The laser energy was measured by means of an absolutely calibrated, pyro-electric receiver; the pulse shape was determined by means of a fast photocell in combination with an SU-oscilloscope I 2-7. The time resolution of the overall system was about 0.5 ns. For measurements it was important to take into account that besides the strong UV-radiation at 337.1 nm, radiation was also emitted in the near IR between about 870 nm and 900 nm. The IR pulse exits from the laser with about 10 ns delay to the UV-pulse; its pulse width was measured at 7 ns, whereas that of the UV-signal amounts to 12 ns under optimum conditions. The energy in the IR-range amounts to around 5 percent of the UV-energy. By means of a dielectric edge filter (KCZ) the IR-fraction was reduced to less than about 0.5 percent in order to prevent falsification of the values when measuring in the UV-range.
- Publication:
-
East European Rept Sci. Technol. JPRS ESA
- Pub Date:
- December 1984
- Bibcode:
- 1984EERST.......40W
- Keywords:
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- Laser Outputs;
- Nitrogen Lasers;
- Performance Tests;
- Time Measurement;
- Laser Pumping;
- Photolysis;
- Pulse Duration;
- Temporal Resolution;
- Lasers and Masers