Investigation of the gain in a CO2 GDL behind wedge-shaped and contoured nozzles. I - The experimental setup, the repetitively pulsed system for gain measurement
Abstract
Weak-signal gain in a CO2 gasdynamic laser was determined using a repetitively pulsed system with a passive scanning unit, making it possible to perform multiple measurements of gain along or across the supersonic flow. The flow-through part of the system was equipped with three different nozzle arrangements: a mononozzle of wedge-shaped and contoured geometry an a nozzle cascade. Preliminary air injections through the flow channel made it possible to delineate the complex structure of intersecting oblique shocks, which have a considerable effect on the gasdynamic and laser parameters. An analysis of the flow pattern made it possible to choose points of the flow free of local irregularities, these points being suitable for the reliable measurement of the active medium.
- Publication:
-
Inzhenerno Fizicheskii Zhurnal
- Pub Date:
- April 1983
- Bibcode:
- 1983InFiZ..44..580A
- Keywords:
-
- Carbon Dioxide Lasers;
- Flow Measurement;
- Gasdynamic Lasers;
- Laser Outputs;
- Lasers;
- Nozzle Geometry;
- Power Gain;
- Flow Distribution;
- Flow Visualization;
- Gas Injection;
- Infrared Detectors;
- Oblique Shock Waves;
- Optical Measuring Instruments;
- Supersonic Nozzles;
- Lasers and Masers