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Optics Letters

Optics Letters


  • Vol. 18, Iss. 24 — Dec. 15, 1993
  • pp: 2162–2164

Creation of an optical xyz coordinate system using bidirectional blazing from a symmetric triangular-groove grating in a conical diffraction mount

R. M. A. Azzam and G. W. Forgala  »View Author Affiliations

Optics Letters, Vol. 18, Issue 24, pp. 2162-2164 (1993)

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An xyz beam splitter is described that uses a diffraction grating upon which light is incident in a plane parallel to the grating grooves to produce symmetric conical diffraction into the ±1 orders, with all higher orders being suppressed or evanescent. The ±1 orders are mutually orthogonal when the wavelength/grating period ratio λ / Λ = 1 / 2, independent of the angle of incidence ϕ. Orthogonality of, the ±1 orders with the direction of incidence occurs at ϕ = arctan ( 1 / 2 ) = 35.264 °. By choice of a symmetric triangular-groove profile (isoceles with a 120° apex angle), bidirectional blazing occurs into the desired ±1 orders, with little or no light appearing in the vestigial 0 order.

© 1993 Optical Society of America

Original Manuscript: August 30, 1993
Published: December 15, 1993

R. M. A. Azzam and G. W. Forgala, "Creation of an optical xyz coordinate system using bidirectional blazing from a symmetric triangular-groove grating in a conical diffraction mount," Opt. Lett. 18, 2162-2164 (1993)

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