Abstract

We present the results of recording of amplitude gratings in SrxBa1-xNb2O6 (SBN) crystals. To eliminate the photorefractive effect we used nonpoled samples. A simple technique defined the susceptibility of doped SBN to amplitude gratings recording. It was shown that, of SBN crystals doped with Ce, Cr, and Co, SBN:Co is the most effective material for use in investigating the photochromic effect. This material has a strong dichroism in linear and photoinduced absorption. The steady-state and dynamic behavior of absorption gratings in nonpoled SBN:Co crystals was studied by the two-wave mixing technique. The study is important both for the optimization of doped SBN for photorefractive applications and for characterization of the electronic structure of defects in these materials.

[Optical Society of America ]

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References

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  1. R. B. Bylsma , D. H. Olson , and A. M. Glass , Photochromic gratings in photorefractive materials , Opt. Lett. OPLEDP 13 , 853 855 ( 1988
    [CrossRef] [PubMed]
  2. A. V. Knyaz kov and M. N. Lobanov , Peculiarities of the interaction of light beams in electrooptical media with phase-amplitude recording of dynamic holograms , Opt. Spectrosk. OSFMA3 59 , 1286 1289 ( 1985
  3. R. S. Cudney , R. M. Pierce , G. D. Bacher , and J. Feinberg , Absorption gratings in photorefractive crystals with multiple levels , J. Opt. Soc. Am. B JOBPDE 8 , 1326 1332 ( 1991
    [CrossRef]
  4. L. I. Ivleva , N. V. Bogodaev , N. M. Polozkov , and V. V. Osiko , Growth of SBN single crystals by Stepanov technique for photorefractive applications , Opt. Mater. OMATET 4 , 168 173 ( 1995
    [CrossRef]
  5. R. A. Vazquez , R. R. Neurgaonkar , and M. D. Ewbank , Photorefractive properties of SBN:60 systematically doped with rhodium , J. Opt. Soc. Am. B JOBPDE 9 , 1416 1427 ( 1992
    [CrossRef]
  6. A. Motes and J. J. Kim , Intensity-dependent absorption coefficient in photorefractive BaTiO 3 crystals , J. Opt. Soc. Am. B JOBPDE 4 , 1379 1381 ( 1987
    [CrossRef]
  7. V. George and J. W. Matthews , Holographic diffraction grating , Appl. Phys. Lett. APPLAB 9 , 212 215 ( 1966
    [CrossRef]

George, V

V. George and J. W. Matthews , Holographic diffraction grating , Appl. Phys. Lett. APPLAB 9 , 212 215 ( 1966
[CrossRef]

Knyazkov, A. V

A. V. Knyaz kov and M. N. Lobanov , Peculiarities of the interaction of light beams in electrooptical media with phase-amplitude recording of dynamic holograms , Opt. Spectrosk. OSFMA3 59 , 1286 1289 ( 1985

Lobanov, M. N

A. V. Knyaz kov and M. N. Lobanov , Peculiarities of the interaction of light beams in electrooptical media with phase-amplitude recording of dynamic holograms , Opt. Spectrosk. OSFMA3 59 , 1286 1289 ( 1985

Other (7)

R. B. Bylsma , D. H. Olson , and A. M. Glass , Photochromic gratings in photorefractive materials , Opt. Lett. OPLEDP 13 , 853 855 ( 1988
[CrossRef] [PubMed]

A. V. Knyaz kov and M. N. Lobanov , Peculiarities of the interaction of light beams in electrooptical media with phase-amplitude recording of dynamic holograms , Opt. Spectrosk. OSFMA3 59 , 1286 1289 ( 1985

R. S. Cudney , R. M. Pierce , G. D. Bacher , and J. Feinberg , Absorption gratings in photorefractive crystals with multiple levels , J. Opt. Soc. Am. B JOBPDE 8 , 1326 1332 ( 1991
[CrossRef]

L. I. Ivleva , N. V. Bogodaev , N. M. Polozkov , and V. V. Osiko , Growth of SBN single crystals by Stepanov technique for photorefractive applications , Opt. Mater. OMATET 4 , 168 173 ( 1995
[CrossRef]

R. A. Vazquez , R. R. Neurgaonkar , and M. D. Ewbank , Photorefractive properties of SBN:60 systematically doped with rhodium , J. Opt. Soc. Am. B JOBPDE 9 , 1416 1427 ( 1992
[CrossRef]

A. Motes and J. J. Kim , Intensity-dependent absorption coefficient in photorefractive BaTiO 3 crystals , J. Opt. Soc. Am. B JOBPDE 4 , 1379 1381 ( 1987
[CrossRef]

V. George and J. W. Matthews , Holographic diffraction grating , Appl. Phys. Lett. APPLAB 9 , 212 215 ( 1966
[CrossRef]

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Figures (10)

Fig. 1
Fig. 1

Dependence of absorption on concentration for SBN:60:Co crystals at 488 nm: 1, αe; 2, αo and at 514.5 nm: 3, αe; 4, αo.

Fig. 2
Fig. 2

Dependence of absorption on concentration coefficient for SBN:60 crystals at 488 nm doped with Co: 1, αe; 2, αo; doped with Cr: 3, αe, αo; and doped with Ce: 4, αe; 5, αo.

Fig. 3
Fig. 3

Spectral dependence of optical transmission on wavelength for the series of four Co-doped samples of SBN:60 with a thickness of 6 mm and Co concentrations of 1, 0.002 wt. %; 2, 0.005 wt. %; 3, 0.01 wt. %, and 4, 0.05 wt. % (concentration of Co3O4 in the melt).

Fig. 4
Fig. 4

Characteristic curves observed with a two-coordinate recorder for SBN:60 samples doped with 1, Cr; 2, Ce; and 3, 4, 5, Co of 0.002, 0.01, and 0.05 wt. %, respectively.

Fig. 5
Fig. 5

Dependence of photoinduced absorption on intensity for SBN:60:Co samples at 514.5 nm: 1, 0.002 wt. %; 2, 0.01 wt. %; 3, 0.05 wt. %. Filled circles, Δαe; filled squares, Δαo.

Fig. 6
Fig. 6

Dependence of photoinduced absorption on concentration for SBN:60:Co samples at 1, 514.5 nm and at 2, 488 nm. Filled circles, Δαe; filled squares, Δαo.

Fig. 7
Fig. 7

Dependence of testing beam intensity (633 nm) on time for SBN:60:Co crystal.

Fig. 8
Fig. 8

Kinetics of formation of an amplitude grating.

Fig. 9
Fig. 9

Intensity dependence of diffraction efficiency for an amplitude grating.

Fig. 10
Fig. 10

Diffraction efficiency measured as a function of external beam-crossing angle 2Θ: 1, measured; 2, calculated (I=1.0 W/cm2; Δα=0.13 cm-1).

Tables (1)

Tables Icon

Table 1 Dependence of the Change in Absorption (Δα) on Intensity for SBN:60:0.05 wt. % CO3O4 at 488 nm

Equations (3)

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Δα=ln(I0/I)/L,
ηα=ItestItest 100%,
ηα=exp-2αdcos Θsech Δαd2 cos Θ,

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