Carbon Dioxide (CO2) lasers are high power lasers, usually used for cutting of ferrous and non-ferrous metals. High-performance gas flow control is a key requirement for achieving high cutting performance with CO2 lasers.
Gas flow control plays an important role for mixing key gases at a number of locations with a CO2 laser:
Beam Generation: The gas mixture used as the emitting medium usually consists of CO2, He and N2. Most laser manufacturers specify a minimum required purity for the beam generation gas mixture, which is typically > 99.99%. A highly-accurate gas mixing control is therefore necessary, either for production of pre-mixed gas cylinders, or for in-situ mixing within the laser unit.
Purging: A high purity gas, usually dry nitrogen, is used to purge the laser transmission tube, in order to avoid problems which may arise due to dust particles or humidity.
Assist Gas: Usually O2 or N2 is used as a cutting assist gas which helps to remove material from the cutting edge.
Axetris offers mass flow solutions, such as gas manifolds (mixers or splitters) for gas flow control in gas lasers. The main advantages of the Axetris mass flow technology are:
- High accuracy and repeatability
- Quick response time
- Compact solution, also available as gas manifolds
- High turn-down ratio of at least 1000:1