Editorial Feature

Neodymium/Chromium Doped YAG (Nd/Cr:YAG) Lasers – Properties and Applications

The YAG (yttrium aluminium garnet) laser can be doped with chromium and neodymium in order to enhance the absorption characteristics of the laser. The NdCrYAG laser is a solid state laser. Chromium ion (Cr3+) has a broad absorption band; it absorbs the energy and transfers it to the neodymium ions (Nd3+) by way of dipole-dipole interactions. Wavelength of 1.064 µm is emitted by this laser.

The laser action of Nd-YAG laser was first demonstrated at the Bell Laboratories in the year 1964. The NdCrYAG laser is pumped by a solar radiation. By doping with chromium, the energy absorption capacity of the laser is enhanced and ultra short pulses are emitted.

Typical applications of this laser include production of nanopowders and as a pumping source for other lasers. The physical properties and applications of this laser are discussed in the sections below.

Laser Properties

Laser Properties
Laser type Solid
Pump source Solar Radiation
Operating wavelength 1.064 µm

Physical and Chemical Properties

Physical and Chemical Properties
Chemical formula Nd3+:Cr3+:Y3Al5O12
Crystal structure Cubic
Melting point 1970°C
Hardness 8-8.5
Thermal conductivity 10-14 W/mK
Young's modulus 280 GPa

Applications

The primary application of Nd:Cr:YAG laser is as a pumping source. It is used in solar pumped lasers, which would be used as a solar-powered satellite system.

Another application of Nd:Cr:YAG laser is in experimental production of nanopowder.

References

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