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Acousto‐optic control and modulation of optical coherence by electronically synthesized holographic gratings

 

作者: Jari Turunen,   Eero Tervonen,   Ari T. Friberg,  

 

期刊: Journal of Applied Physics  (AIP Available online 1990)
卷期: Volume 67, issue 1  

页码: 49-59

 

ISSN:0021-8979

 

年代: 1990

 

DOI:10.1063/1.345232

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We introduce a new technique to modify the coherence properties and the far‐field intensity distributions of optical fields. Use is made of a combination of Bragg diffraction and Raman–Nath diffraction in an acousto‐optic deflector. The high‐frequency Bragg grating in the deflector is phase modulated by a synthetic low‐frequency Raman–Nath regime grating that has a structure of an optimized phase‐only computer‐generated hologram. We demonstrate, e.g., electronic control of the state of spatial coherence of light, Gaussian to flat‐top conversion, and the generation of arrays of equally intense but mutually incoherent light spots.

 

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