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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 3, Iss. 7 — Jul. 10, 2005
  • pp: 418–421

Spectral anomalies of polychromatic, spatially coherent light diffracted by an annular aperture in the far field

Xiandai Hu and Jixiong Pu  »View Author Affiliations


Chinese Optics Letters, Vol. 3, Issue 7, pp. 418-421 (2005)


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Abstract

The spectral behavior of polychromatic spatially fully coherent light diffracted by an annular aperture in the far field is studied. It is shown that the spectrum in the far field is generally different from that at the aperture, i.e., the spectrum in the far field is proportional to the spectrum at the aperture and a spectral modifier, which depends on the central obstruction ratio ? and diffraction angle ?. Detailed numerical calculation results indicate that significant spectral changes take place in the vicinity of zeros of the Airy pattern. It is found that at the critical diffraction angle ?c, the spectrum is split into two lines, while at a diffraction angle a little smaller than ?c, the spectrum is red-shifted, and at a diffraction angle a little larger than ?c, the spectrum is blue-shifted. The influence of the central obstruction ratio on the spectral anomalies is presented.

© 2005 Chinese Optics Letters

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(300.6170) Spectroscopy : Spectra

Citation
Xiandai Hu and Jixiong Pu, "Spectral anomalies of polychromatic, spatially coherent light diffracted by an annular aperture in the far field," Chin. Opt. Lett. 3, 418-421 (2005)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-3-7-418

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