›› 2015, Vol. 24 ›› Issue (1): 14210-014210.doi: 10.1088/1674-1056/24/1/014210

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Fluctuations of optical phase of diffracted light for Raman-Nath diffraction in acousto-optic effect

翁存程a b, 章小曼b c   

  1. a College of Physics and Energy, Fujian Normal University, Fujian 350007, China;
    b Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education, Fujian 350007, China;
    c College of Photonic and Electronic Engineering, Fujian Normal University, Fujian 350007, China
  • 收稿日期:2014-05-07 修回日期:2014-09-12 出版日期:2015-01-05 发布日期:2015-01-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61178089) and the Science and Technology Program of the Educational Office of Fujian Province of China (Grant Nos. JB12012 and JB13003).

Fluctuations of optical phase of diffracted light for Raman-Nath diffraction in acousto-optic effect

Weng Cun-Cheng (翁存程)a b, Zhang Xiao-Man (章小曼)b c   

  1. a College of Physics and Energy, Fujian Normal University, Fujian 350007, China;
    b Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education, Fujian 350007, China;
    c College of Photonic and Electronic Engineering, Fujian Normal University, Fujian 350007, China
  • Received:2014-05-07 Revised:2014-09-12 Online:2015-01-05 Published:2015-01-05
  • Contact: Zhang Xiao-Man E-mail:xmzhang@fjnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61178089) and the Science and Technology Program of the Educational Office of Fujian Province of China (Grant Nos. JB12012 and JB13003).

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摘要： The Raman-Nath diffraction in acousto-optic effect was studied theoretically and experimentally in the paper. Up to now, each order of diffracted light in Raman-Nath diffraction was still considered simply to be just frequency-shifted and to be a plane wave. However, we find that the phase and frequency shifts occur simultaneously and individually in Raman-Nath diffraction. The findings demonstrate that, in addition to the frequency shift, the optical phase of each order of diffracted light is also shifted by the sound wave and fluctuates with the sound wave and is related to the location in the acoustic field from which the diffracted light originates. As a result, the wavefront of each order of diffracted light is modulated to fluctuate spatially and temporally with the sound wave. Obviously, these findings are significant for applications of Raman-Nath diffraction in acousto-optic effect because the optical phase plays an important role in optical coherence technology.

关键词: Raman-Nath diffraction, acousto-optic effect, phase shift, frequency shift

Abstract: The Raman-Nath diffraction in acousto-optic effect was studied theoretically and experimentally in the paper. Up to now, each order of diffracted light in Raman-Nath diffraction was still considered simply to be just frequency-shifted and to be a plane wave. However, we find that the phase and frequency shifts occur simultaneously and individually in Raman-Nath diffraction. The findings demonstrate that, in addition to the frequency shift, the optical phase of each order of diffracted light is also shifted by the sound wave and fluctuates with the sound wave and is related to the location in the acoustic field from which the diffracted light originates. As a result, the wavefront of each order of diffracted light is modulated to fluctuate spatially and temporally with the sound wave. Obviously, these findings are significant for applications of Raman-Nath diffraction in acousto-optic effect because the optical phase plays an important role in optical coherence technology.

Key words: Raman-Nath diffraction, acousto-optic effect, phase shift, frequency shift

中图分类号:  (Nonlinear optics)

  • 42.65.-k
43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound) 42.25.Fx (Diffraction and scattering)