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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 16 — Aug. 8, 2005
  • pp: 6111–6116

Near-field diffraction of irregular phase gratings with multiple phase-shifts

Yunlong Sheng and Li Sun  »View Author Affiliations


Optics Express, Vol. 13, Issue 16, pp. 6111-6116 (2005)
http://dx.doi.org/10.1364/OPEX.13.006111


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Abstract

A phase-step in a phase mask is not copied into the substrate but is split into two half-amplitude phase-shifts in the near-field because of the presence of an additional interference fringe system of the two beams diffracted from the two grating sections separated by the phase-step. In the case of multiple phase-shifts, the split phase-shifts from two adjacent phase-steps can crossover in the propagation without interfere. This paper contributes to understanding the near-field diffraction of irregular phase gratings with multiple phase-shifts, and provides a theoretical base for designing multiple phase-shifted phase masks for high channel-count phase-only sampled fiber Bragg gratings [1,2].

© 2005 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(050.1970) Diffraction and gratings : Diffractive optics
(050.5080) Diffraction and gratings : Phase shift
(060.5060) Fiber optics and optical communications : Phase modulation
(220.3740) Optical design and fabrication : Lithography

ToC Category:
Research Papers

History
Original Manuscript: June 29, 2005
Revised Manuscript: July 27, 2005
Published: August 8, 2005

Citation
Yunlong Sheng and Li Sun, "Near-field diffraction of irregular phase gratings with multiple phase-shifts," Opt. Express 13, 6111-6116 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-16-6111


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References

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