Abstract

An 0.0125-nm (FWHM) bandwidth optical filter with >10% throughput, clean sidebands, f/12 speed, and a response roll-off of −40 dB/decade has been developed by using volume holography in photorefractive materials. The performance of the Accuwave holographic filter is characterized and compared with that of a Lyot filter, which is the standard for solar astronomy today. Moreover, this device represents the first commercial application of volume holography in photorefractive crystals.

© 1993 Optical Society of America

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References

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  1. H. Zirin, Astrophysics of the Sun (Cambridge U. Press, Cambridge, 1988).
  2. A. M. Glass, Opt. Eng. 17, 470 (1978).
  3. N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
    [CrossRef]
  4. J. J. Amodei, D. L. Staebler, RCA Rev. 33, 71 (1972).
  5. D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
    [CrossRef]
  6. G. A. Rakuljic, V. Leyva, A. Yariv, Opt. Lett. 17, 1471 (1992).
    [CrossRef] [PubMed]
  7. H. Stoll, A. Yariv, Opt. Commun. 8, 5 (1973).
    [CrossRef]

1992 (1)

1979 (1)

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

1978 (1)

A. M. Glass, Opt. Eng. 17, 470 (1978).

1975 (1)

D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
[CrossRef]

1973 (1)

H. Stoll, A. Yariv, Opt. Commun. 8, 5 (1973).
[CrossRef]

1972 (1)

J. J. Amodei, D. L. Staebler, RCA Rev. 33, 71 (1972).

Amodei, J. J.

D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
[CrossRef]

J. J. Amodei, D. L. Staebler, RCA Rev. 33, 71 (1972).

Burke, W. J.

D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
[CrossRef]

Glass, A. M.

A. M. Glass, Opt. Eng. 17, 470 (1978).

Kukhtarev, N. V.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

Leyva, V.

Markov, V. B.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

Odulov, S. G.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

Phillips, W.

D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
[CrossRef]

Rakuljic, G. A.

Soskin, M. S.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

Staebler, D. L.

D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
[CrossRef]

J. J. Amodei, D. L. Staebler, RCA Rev. 33, 71 (1972).

Stoll, H.

H. Stoll, A. Yariv, Opt. Commun. 8, 5 (1973).
[CrossRef]

Vinetski, V. L.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

Yariv, A.

Zirin, H.

H. Zirin, Astrophysics of the Sun (Cambridge U. Press, Cambridge, 1988).

Appl. Phys. Lett. (1)

D. L. Staebler, W. J. Burke, W. Phillips, J. J. Amodei, Appl. Phys. Lett. 26, 182 (1975).
[CrossRef]

Ferroelectrics (1)

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, V. L. Vinetski, Ferroelectrics 22, 949 (1979).
[CrossRef]

Opt. Commun. (1)

H. Stoll, A. Yariv, Opt. Commun. 8, 5 (1973).
[CrossRef]

Opt. Eng. (1)

A. M. Glass, Opt. Eng. 17, 470 (1978).

Opt. Lett. (1)

RCA Rev. (1)

J. J. Amodei, D. L. Staebler, RCA Rev. 33, 71 (1972).

Other (1)

H. Zirin, Astrophysics of the Sun (Cambridge U. Press, Cambridge, 1988).

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Figures (6)

Fig. 1
Fig. 1

Transmission- and reflection-mode geometries for writing holographic gratings in photorefractive crystals, showing relationships between various k vectors.

Fig. 2
Fig. 2

Optical setup used to write the volume grating for the holographic H-α filter.

Fig. 3
Fig. 3

Optical configuration of the 0.0125-nm holographic filter when it is used with a telescope.

Fig. 4
Fig. 4

Linear plot of the spectral responses of the 0.0125-nm holographic filter (solid curve) centered at the H-α wavelength (656.46 nm in vacuum) and the 0.05-nm (Halle) Lyot filter (dashed curve).

Fig. 5
Fig. 5

Logarithmic plot of the spectral responses of the 0.0125-nm holographic filter (solid curve) and the 0.05-nm (Halle) Lyot filter (dashed curve), showing sidelobe levels.

Fig. 6
Fig. 6

Photograph of the Sun taken with the Accuwave 0.0125-nm H-α filter.

Equations (7)

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K = k ref k obj .
R = | κ sinh ( S l ) Δ K 2 sinh ( S l ) + i S cosh ( S l ) | 2 ,
κ = π | n 1 | λ 0 ( coupling constant ) ,
S = [ κ 2 ( Δ K 2 ) 2 ] 1 / 2 ,
Δ K = 4 π n 0 ( 1 λ 1 λ 0 ) = 2 Δ k ,
Δ k = 2 π n 0 λ 0 Δ λ = π l or Δ λ = λ 0 2 2 n 0 l
Δ k = 2 π n 0 λ 0 { [ 1 cos 2 ( θ Δ θ ) n 0 2 ] 1 / 2 ( 1 cos 2 θ n 0 2 ) 1 / 2 } = π l ,

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