Reflection of light by composite volume holograms: Fresnel corrections and Fabry-Perot spectral filtering

    Authors

    L. B. Glebov; J. Lumeau; S. Mokhov; V. Smirnov;B. Y. Zeldovich

    Comments

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    Abbreviated Journal Title

    J. Opt. Soc. Am. A-Opt. Image Sci. Vis.

    Keywords

    DISTRIBUTED FEEDBACK LASERS; COUPLED-WAVE THEORY; GRATINGS; FIBER; Optics

    Abstract

    Effects in composite volume Bragg gratings (VBGs) are studied theoretically and experimentally. The mathematics of reflection is formulated with a unified account of Fresnel reflections by the boundaries and of VBG reflection. We introduce the strength S of reflection by an arbitrary lossless element such that the intensity of reflection is R=tanh(2)S. We show that the ultimate maximum/minimum of reflection by a composite lossless system corresponds to addition/subtraction of relevant strengths of the sequential elements. We present a new physical interpretation of standard Fresnel reflection: Strength for TE or for TM reflection is given by addition or by subtraction of two contributions. One of them is an angle-independent contribution of the impedance step, while the other is an angle-dependent contribution of the step of propagation speed. We study an assembly of two VBG mirrors with a thin immersion layer between them that constitutes a Fabry-Perot spectral filter. The transmission wavelength of the assembly depends on the phase shift between the two VBGs. Spectral resolution Delta lambda(FWHM)=25 pm at lambda= 1063.4 nm is achieved with the device of small total physical thickness 2L = 5.52 mm. (C) 2008 Optical Society of America.

    Journal Title

    Journal of the Optical Society of America a-Optics Image Science and Vision

    Volume

    25

    Issue/Number

    3

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    751

    Last Page

    764

    WOS Identifier

    WOS:000254550300027

    ISSN

    1084-7529

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