White Paper: An Introduction To Diode Lasers For Materials Processing

Semiconductor diode laser technology offers a number of practical and cost advantages over both other lasers and traditional techniques for processes such as welding, cladding and heat treating.

By Coherent, Inc.

Low power diode lasers are a well established technology, used extensively in products such as DVD players, computer optical drives, fiberoptic telecommunications and even laser pointers. The reason for this success is that diode lasers offer a combination of high electrical efficiency, long maintenance-free lifetimes, small size, and short wavelength that far surpasses any other laser technology. While these commonly encountered low power diode lasers typically only provide a few milliwatts of output, diode laser systems are available with power levels in the multi-kilowatt range. These types of diode lasers are currently employed in a number of different materials processing applications. The basic construction and operation of these systems is described here.

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