Abstract

The properties of anisotropic diffraction of light by volume holographic grating in birefringent photorefractive crystals are discussed. This diffraction takes place when the refractive index for diffracted light is different from the refractive index for incident light. It is found that in some special geometry of wavevector diagram the diffraction becomes less sensitive to the wavelength mismatch of Bragg condition. The wavelength range may extent in several times the range of ordinary isotropic diffraction on the grating of the same spacing and thickness. Theoretical explanation of this phenomena and experimental results of widerange diffraction in BaTiO3 photorefractive crystal are also presented.

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]

Appl. Phys. Lett.

E. G. H. Lean, C. F. Quate and H. J. Shaw, ?Continuos deflection of laser beam,? Appl. Phys. Lett. 10, 48-50 (1967).
[CrossRef]

Bell Syst. Tech. J.

H. Kogelnik, ?Coupled wave theory for thick hologram grating,? Bell Syst. Tech. J. 48, 2909-2947 (1969).

Bragg signal processing and output devic

I. C. Chang, ?Design of wideband acoustoopic Bragg cells,? in Bragg signal processing and output devices, ed. Bob V. Markevich and Theo Kooij, Proc. SPIE 352, 34-41 (1982).

IEEE J. Quantum Electron.

R. W. Dixon, ?Acoustic diffraction of light in anisotropic media,? IEEE J. Quantum Electron. QE-3, 85-93 (1967).
[CrossRef]

J. Opt. Soc. Am. B

Jpn. J. Appl. Phys.

K. Kojima, ?Diffraction of light waves in inhomogeneous and anisotropic medium,? Jpn. J. Appl. Phys. 21, 1303-1307 (1982).
[CrossRef]

Opt. Commun.

T. G. Pencheva, M. P. Petrov and S. I. Stepanov, ?Selective properties of volume phase holograms in photorefractive crystals,? Opt. Commun. 40, 175-178 (1981).
[CrossRef]

Phys. Rev. E

G. Montermezzani and M. Zgonik, ?Light diffraction at mixed phase and absorption gratings in anisotropic media for arbitrary geometries,? Phys. Rev. E 55, 1035-1047 (1997).
[CrossRef]

Proc. IEEE

N. Uchida and N. Niizeki, ?Acoustooptic deflection material and techniques,? in Proc. IEEE 61, (Institute of Electrical and Electronics Engineers, New York, 1973), 1073-1092.

Sov. Tech. Phys. Lett.

S. I. Stepanov, M. P. Petrov and A. A. Kamshilin, ?Optical diffraction with polarization-plane rotation in a volume hologram in an electrooptic crystal,? Sov. Tech. Phys. Lett. 3, 345-346 (1977).

Other

P. Yeh, Introduction to photorefractive nonlinear optics (John Wiley & Sons Inc., New York, 1993).

Supplementary Material (1)

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Figures (5)

Fig. 1
Fig. 1

Wave vector diagram of anisotropic diffraction in (x,y) plane of uniaxial crystal

Fig.2.
Fig.2.

The dispersive curves of anosotropic diffraction on the grating with spacing Λ=0.9 μm in (x,y) plane of BaTiO3 crystal (no=2.458, ne=2.399))

Fig.3.
Fig.3.

Experimental setup

Fig.4
Fig.4

The photos of diffracted images of widerange anisotropic diffraction in BaTiO3 crystal, (1.5 MB) Movie of two-diffracted spots

Fig.5.
Fig.5.

The angle characteristic of widerange anisotropic diffraction in BaTiO3 crystal for two different wavelengths (red-for 514 nm, blue-for 501 nm)

Equations (5)

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{ sin Θ i = Λ 2 n o Λ ( n o 2 n e 2 + λ 2 Λ 2 ) sin Θ d = Λ 2 n e λ ( n o 2 n e 2 λ 2 Λ 2 ) ,
λ o = Λ n o 2 n e 2 .
Δ λ anis = λ 3 L Δ n ,
Δ λ is = λ 2 cos Θ i 2 Ln sin 2 Θ i
Δ λ anis Δ λ is = 2 n sin 2 Θ i cos Θ i L λ Δ n .

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