Uniform and efficient beam shaping for high-energy lasers
| Autor: | Clemens Roider, Michael Schmidt, Lisa Ackermann |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Wavefront
Computer science business.industry Phase (waves) Speckle noise 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Liquid crystal on silicon Speckle pattern Optics Backplane law 0103 physical sciences 0210 nano-technology business Energy (signal processing) |
| Zdroj: | Optics Express. 29:17997 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.426953 |
| Popis: | Phase-only beam shaping with liquid crystal on silicon spatial light modulators (SLM) allows modulating the wavefront dynamically and generating arbitrary intensity patterns with high efficiency. Since this method cannot take control of all degrees of freedom, a speckle pattern appears and drastically impairs the outcome. There are several methods to overcome this issue including algorithms which directly control phase and amplitude, but they suffer from low efficiency. Methods using two SLMs yield excellent results but they are usually limited in the applicable energy due to damage to the SLM’s backplane. We present a method which makes use of two SLMs and simultaneously gives way for high-energy laser applications. The algorithm and setup are designed to keep the fluence on the SLMs low by distributing the light over a large area. This provides stability against misalignment and facilitates experimental feasibility while keeping high efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|