Needle Beam Generated by a Laser Beam Passing Through a Scattering Medium
| Autor: | Jixiong Pu, Ziyang Chen, Xiansheng Hu, Xuanxuan Ji |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
lcsh:Applied optics. Photonics
Physics Wavefront Scattering business.industry Astrophysics::Instrumentation and Methods for Astrophysics lcsh:TA1501-1820 02 engineering and technology Interference (wave propagation) Focal Pattern optical field modulation Atomic and Molecular Physics and Optics Intensity (physics) Speckle pattern 020210 optoelectronics & photonics Cardinal point Optics Speckle 0202 electrical engineering electronic engineering information engineering lcsh:QC350-467 Physics::Accelerator Physics Electrical and Electronic Engineering business lcsh:Optics. Light Beam (structure) |
| Zdroj: | IEEE Photonics Journal, Vol 10, Iss 5, Pp 1-8 (2018) |
| ISSN: | 1943-0647 |
| Popis: | The propagation of coherent light through an inhomogeneous medium generates a speckle pattern caused by the complex interference of randomly scattered waves. The speckle pattern does not resemble the incident beam profile. However, the spatially random pattern can be reshaped into a bright focal spot by wavefront shaping. And, in general, the focused intensity is of maximum just at the focal plane, and the focused intensity of the shaped focal beam decreases sharply with incremental distance from the focal plane. In this paper, we report the experimental generation of a needle beam as the laser beam passes through a scattering medium. The intensity and beam size of the needle beam remain nearly intact within the distance of 25 mm, which indicates that the focal pattern has a uniform property. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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