Beam Expansion
Precise expansion of laser beams.
Laser beam expansion with aspheric lenses - a unique system
Conventional laser beam expander can only be adapted with great effort, are relatively large and only suitabare corrected and an afocal system for large input beam diameters is realized. The aspheric beam expansion lens reduces the system size up to 50% compared to currently available optical components on the market. The asphericon laser beam expander system covers a wide wavelength spectrum. Design wavelengths of 355, 532, 632 and 780 to 1064 nm. An intelligent assembly concept saves time-consuming adjustments and ensures precision and flexibility. Discover the advantages of aspherical beam expansion for your application!
New: a|BeamExpander HighPower (HP) This new beam expander offers maximum stability for high-power laser applications thanks to its robust coating and excellent surface quality. The new high-power version functions as both a beam expander and reducer across the 500 – 1600 nm range. It is also available at the design wavelength of 1550 nm and is compatible with all BeamTuning components.
Aspheric and diffraction-limited beam expander
a|BeamExpander
Discover the world‘s first aspheric and diffraction-limited beam expander. The a|BeamExpander is a monolithic laser accessory with just one aspheric lens for the highest level of precision. Experience nearly endless possibilities with up to 32× beam magnification and optimized performance for different design wavelengths (355, 532, 632, 780, 1064 nm) - individually measured and certified. The asphericon beam expansion system works completely diffraction limited, both as a single element and in cascades with up to five additional coated elements. Three magnification levels are available (1.5, 1.75, 2.0), which can achieve up to 32x expansion.
Specifications
- Available in five design wavelengths [355 nm / 532 nm / 632 nm / 780 nm / 1064 nm]
- Max. input aperture 10.6 – 14.7 mm, max. output aperture 22.5 mm
- Available with magnifications of 1.5 | 1.75 | 2.0
- Possibility of combining up to five expander for up to 32 times beam expansion and over 230 intermediate stages
- Completely diffraction-limited – individually measured and guaranteed by an original asphericon certificate
- Laser induced damage threshold (Coating): 12 J/cm², 100 Hz, 6 ns, 532 nm
Technical dimensions [mm]
a|BeamExpander
a|BeamExpander UV
Beam expander for high laser powers
a|BeamExpander HighPower
Experience precision beam expansion with exceptional durability. Designed for high power laser applications, the a|BeamExpander HighPower (HP) features robust coatings that minimize susceptibility to damage and ensure long-term stability. Its superior optical surface quality and high cleanliness standards enable optimum performance in demanding environments. Available in four magnifications and five design wavelengths - now including 1550 nm - the a|BeamExpander HP delivers outstanding results from 500 to 1600 nm as both expander and reducer, fully compatible with all BeamTuning elements.
Specifications & technical dimensions [mm]
- Large spectral range: 500 nm to 1600 nm
- Available with magnifications 1.25 | 1.5 | 1.75 | 2.0
- Optimized for design wavelengths 532 nm, 632 nm, 780 nm, 1064 nm and 1550 nm thanks to robust coatings (best performance at design wavelength)
- Compact design with minimal system length
- Fully compatible with all BeamTuning elements
- Functions as both a beam expander and reducer
- Optimized for input beams up to 8 mm and output beams from 10 to 16 mm
- Free aperture up to 27 mm for maximum flexibility
Flexibility
The a|BeamExpander HP can be used flexibly in the wavelength range from 500 to 1600 nm for ultra short pulse laser applications. Please be aware of the pulse broadening effect. The chart on the right shows, how the input pulse changes by propagating through an optical element such as the a|BeamExpander HP. Contact us for detailed information about the expected puls broadening.
Pulse broadening effect
Performance
The a|BeamExpander HP delivers outstanding optical performance with stable magnification and diffraction-limited quality for input beams up to 8 mm. Designed for high-power laser applications, it ensures maximum efficiency and reliability across various magnifications. The maps below illustrate the simulated wavefronts of the a|BeamExpander HP at 532 nm, demonstrating its exceptional performance at different expansion ratios.
Simulated wavefronts at 532 nm
Made of ultra-pure glass, the a|BeamExpander HP ensures exceptional transmission up to 2 µm, while advanced V-coatings minimize residual reflections to below 0.1%. To protect the optical components from back reflections that could exceed the Laser Induced Damage Threshold (LIDT), potential reflections are strategically positioned away from the lenses and confined within the mount. The sophisticated optical design ensures that these reflections occur at a sufficient distance from the lenses, further enhancing stability in high power applications.
When used as a reducer, minor reflections may extend up to 8 mm beyond the a|BeamExpander HP. However, this has no impact when paired with another a|BeamExpander HP, as both units are precisely engineered to work seamlessly together, regardless of their orientation.
For applications that require optical elements to be placed directly on the mount of an inverted expander, please contact us for further advice.
Cross- and intra-system adapter for flexible combination
a|Adapter
Cross-system and intra-system a|Adapters enable individual BeamTuning products and mounted optics to be quickly fitted together. They also ensure high compatibility with other optics systems without the need for any additional adjustment.
asphericon’s intra-system adapters can be used to connect for example a|BeamExpanders to each other in both functional directions for the finer adjustment of magnification levels. The range of cross-system a|Adapters includes adapters with C-mount and SM1 threads for easy integration into existing set-ups, even non-system ones. Due to its external diameter, the 1.2" circumference adapter can be used as both intra-system and cross-system adapter.
Intra-system a|Adapter
Intra-system a|Adapters allow to combine all BeamTuning elements, e.g. to use a|BeamExpander in both functional directions, to expand or reduce the beam diameter. The a|Adapter tilt ensures precise alignment of all optical elements within the beam path and can be flexibly tilted in different directions (x- and y-direction).
Intra-system a|Adapter
Cross-system a|Adapter
Easy integrate all BeamTuning elements into any optical system (e.g. Qioptiq, OWIS or Edmund Optics) through a variety of mounting concepts by using the cross- system a|Adapters (C-Mount, SM1). Thanks to its outer diameter, the 1.2" circumference can be used both as intra-system and as cross-system a|Adapter.
Cross-system a|Adapter
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