A scaling up of kW-c1ass chemical oxygen-iodine laser (COIL) is achieved. The key issues for the system design of COIL for industrial application is discussed. The scaled up COIL system of l-kW output power is now under trial operations. In these operations, a maximum output power of 1100 W, and a continuous operation time of more than 2 h with a power of over SOO W is recorded.

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Having succeeded the oscillation of 6 kW output power by a supersonic flow, the chemical oxygen iodine laser (COIL) is now going to be realized as a new industrial laser by adopting various leading technologies.

The influence of solution composition to the generation of the excited oxygen O 2 (j A.) for a chemical oxygen-iodine laser is studied. Moderate power operation of 100 W for a duration of more than 3 h was achieved. For the achievement of long-term operation, new types of devices for water vapor trapping and new NaCl separation were developed.

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