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Deep UV Fiber Lasers

What Are Deep UV Fiber Lasers?

"Deep UV" typically refers to ultraviolet laser wavelengths that are shorter than 300 nanometers (nm). Fiber lasers, which start with infrared beams (~1000 nm), achieve deep UV wavelengths through a process known as wavelength or frequency doubling. By focusing the infrared laser beam through a non-linear crystal, the wavelength is precisely halved for second harmonic generation. Repeating the process halves the wavelength again, extending the range of fiber lasers to the fourth harmonic.

 

Deep UV Fiber Laser Wavelength

 

Deep UV lasers offer key benefits in specific applications when compared to more commonly used infrared and visible wavelength lasers. When combined with a more reliable and easy to integrate fiber laser architecture, the deep UV wavelength has experienced an increase in adoption across a variety of industries. Deep UV lasers play a crucial role in a number of applications where they are used for micromachining, semiconductor manufacturing, and advanced or scientific applications.

Benefits of Deep UV Fiber Lasers

Higher Precision & Resolution

Shorter wavelengths offer reduced diffraction effects which allows them to be focused to a smaller spot than is possible with longer wavelength lasers. Fundamentally, the diffraction limit is described by the Rayleigh criterion, which states that the minimum resolvable spot size is approximately equal to half the wavelength of the beam. Smaller spots allow for higher spatial resolution in applications that require maximum precision, from microprocessing to microscopy.

 

Improved Absorption

The higher photonic energy of UV light is strongly absorbed in a shallow surface of the bulk material. High-energy deep UV pulses locally heat a sub-micron layer of the bulk material, exciting or ionizing the material at the molercular or atomic level. At high enough energy densities, much of the heat is dissipated from the target in the plasma generated by the process. This process, known as photo-ablation, is responsbile for reduced heat affected zones that virtually eliminate negative heat effects like unintended melting and cracking. For many materials, particularly those that are transparent or heat sensitive, shorter wavelengths are necessary to achieve the absorption needed for high-quality results.

 

Deep UV Fiber Laser Technology

Industry Leading Deep UV Laser Technology

Traditionally, users seeking the benefits of ultraviolet and deep UV lasers have been forced to accept lasers that are unreliable, expensive, or difficult to integrate. Short-lived components, bulky designs, and consumables like gases have limited the widespread adoption of deep UV lasers. Only IPG provides a unique combination of power, reliability, and operating stability to make deep UV wavelengths affordable and robust enough for everyday industrial use.

Industrial Reliability: IPG deep UV fiber lasers are built with exceptional non-linear crystals grown in dedicated IPG crystal facilities. The quality of these crystals inhibits degradation to ensure longer lasting power stability.

Robust, Compact Design: Unique fiber laser technology allows IPG deep UV fiber lasers to fit more power in less space and resist vibration and contamination, making them easier to integrate into almost any industrial environment.

Application Flexibility: Available with continuous wave, nanosecond pulsed, and ultrafast option, IPG offers more power, higher beam qualities, and more options for optimal performance in a wider range of applications.

IPG Deep UV Fiber Lasers

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Nanosecond Deep UV Fiber Lasers

Nanosecond deep UV lasers offer nanosecond pulse durations and are well-suited for micromachining applications including cutting, drilling, marking, and surface treatment for glass, diamond, Teflon, and polymers.

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Picosecond Deep UV Fiber Lasers

Picosecond deep UV lasers offer short picosecond pulse durations and high pulse energy for use in advanced laser microprocessing applications in non-metals like PCBs, flex circuits, and selective material removal for LEDs and displays.

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Continuous Wave Deep UV Fiber Lasers

Continuous wave deep UV lasers are single-frequency and linearly polarized, making them well-suited for advanced and scientific applications like inspection, spectroscopy, FGB writing, photolithography, and disinfection.

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Want to Learn More About Deep UV Fiber Lasers?

Whether you have a project in mind or just want to learn more about deep UV fiber lasers, an IPG laser expert is ready to help.