Quality assessment for large-aperture optical elements inducing phase jumps
| Autor: | Vicenţiu Iancu, Anda-Maria Talpoşi, Cristina Gheorghiu, Răzvan Ungureanu, Ioan Dăncuş, Dan-Gheorghiţă Matei, Daniel Ursescu |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | High Power Laser Science and Engineering, Vol 12 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2095-4719 2052-3289 |
| DOI: | 10.1017/hpl.2024.59 |
| Popis: | Achieving complex pulses with high-power lasers necessitates rigorous testing of specially designed optical components. The qualification of these components using complementary devices to access both the high-resolution and the large-aperture properties, followed by validation using propagation simulations, is proposed here. In particular, the topology of a large-aperture staircase-like Fresnel phase plate used to generate vortex pulses is qualified using a non-contact optical profiler and a large-aperture wavefront measurement setup based on a Shack–Hartmann sensor. The resulting topography is further used for simulating the focus of laser beams after passing through the phase plate. Step height distribution effects on the doughnut-shaped focus are identified, and avoiding the indicated pitfall in the design of the phase plate provides at least a 10-fold reduction of the irradiance modulation on the circumference of the focus in the super-Gaussian case. |
| Databáze: | Directory of Open Access Journals |
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