ACOUSTOOPTIC CONTROL AND MODULATION OF OPTICAL COHERENCE BY ELECTRONICALLY SYNTHESIZED HOLOGRAPHIC GRATINGS

被引：42

作者：

TURUNEN, J

TERVONEN, E

FRIBERG, AT

机构：

[1] Department of Technical Physics, Helsinki University of Technology

来源：

JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.345232

中图分类号：

O59 [应用物理学];

学科分类号：

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.

引用

页码：49 / 59

页数：11

共 47 条

[1]

ANASTASI P, 1987, P INT C OPTICAL SYST, P81

[2] 2ND-HARMONIC GENERATION BY A GAUSSIAN SCHELL-MODEL SOURCE [J].