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Acousto-optic control and modulation of optical coherence by electronically synthesized holographic gratings (1990)

Turunen, Jari ; Tervonen, Eero ; Friberg, Ari T.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 67 (1990), S. 49-59

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: 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.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.345232

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