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Source: PowerPhotonic
Understanding Beam Shapers in Optics
A beam shaper, also known as a beam converter, is an optical device that alters the spatial profile of a light beam. This modification can take various forms, such as transforming a Gaussian input beam into a flat-top (top-hat) beam using refractive or micro-optic beam shapers.
Types of Beam Shapers
One common application of beam shapers is in conjunction with high-power laser diodes to enhance beam symmetry in two orthogonal directions. This adjustment is beneficial for tasks like launching the beam into an optical fiber or pumping a solid-state gain medium. Devices like two-mirror beam shapers, which maintain brightness, are commonly used for this purpose.
Other beam shaping methods involve micro-optical structures or fiber bundles to achieve similar outcomes. These devices ensure equal beam quality in both directions, which cannot be achieved solely with cylindrical lenses.
Additional Functions of Beam Shapers
Aside from symmetry correction, beam shapers can also address issues like the “smile” of diode bars and homogenize beam intensity distribution for more uniform output.
Conclusion
Beam shapers play a crucial role in optics by reshaping light beams to suit specific applications. Whether it’s enhancing symmetry, correcting imperfections, or achieving uniformity, these devices are essential for optimizing laser systems and other optical setups.
Source: LightTrans
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