A gas laser is a laser in which an electric current is discharged through a gas to produce light. The first gas laser, the Helium-neon, was co-invented by Iranian physicist Ali Javan and American physicist William R. Bennett, Jr. in 1960.
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Advantages
- High volume of active material
- Active material is relatively inexpensive
- Almost impossible to damage the active material
- Heat can be removed quickly from the cavity
Applications
- He-Ne laser is mainly used in making holograms.
- In laser printing He-Ne laser is used as a source for writing on the photosensitive material.
- He-Ne lasers were used in reading the Bar Code which is imprinted on the product. They have been largely replaced by laser diodes.
Types of gas laser
See also
References
- Yariv, Amnon (1989). Quantum Electronics (3rd Edition ed.). Wiley. ISBN 0-4716-0997-8.
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