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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 7 — Apr. 1, 2001
  • pp: 417–419

Optimized quantization for diffractive phase elements by use of uneven phase levels

Karsten Ballüder and Mohammad R. Taghizadeh  »View Author Affiliations


Optics Letters, Vol. 26, Issue 7, pp. 417-419 (2001)
http://dx.doi.org/10.1364/OL.26.000417


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Abstract

Many applications of diffractive phase elements involve the calculation of a continuous phase profile, which is subsequently quantized for fabrication. The quantization process maps the continuous range of phase values to a limited number of discrete steps. We present a new scheme with unevenly spaced levels for the design of diffractive elements and apply it to the design of intracavity mode-selecting elements. We show that this modified quantization can produce significantly better results than are possible with a regular or even the bias-phase-optimized quantization scheme that we reported here earlier. In principle this process can be employed to a greater or lesser extent in any quantization process, allowing the fabrication of diffractive elements with much improved performance.

© 2001 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.2770) Diffraction and gratings : Gratings
(140.3300) Lasers and laser optics : Laser beam shaping
(230.1950) Optical devices : Diffraction gratings

Citation
Karsten Ballüder and Mohammad R. Taghizadeh, "Optimized quantization for diffractive phase elements by use of uneven phase levels," Opt. Lett. 26, 417-419 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-7-417


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