Abstract

This paper describes a compact Faraday rotation isolator using terbium aluminum garnet (TAG) as the Faraday rotation material and small high field permanent magnets made of copper–rare earth alloys. The nominal isolation is 26 dB with a 0.4-dB forward loss. The present isolator can be adjusted to provide effective isolation from 4880 Å to 5145 Å. Details of the design, fabrication, and performance of the isolator are presented.

© 1971 Optical Society of America

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References

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  1. C. B. Rubenstein, W. H. Grodkiewicz, L. G. Van Uitert, J. Appl. Phys. 35, 3069 (1964).
    [CrossRef]
  2. E. A. Nesbitt et al., Appl. Phys. Lett. 12, 361 (1968).
    [CrossRef]
  3. J. H. van Vleck, M. H. Hebb, Phys. Rev. 46, 17 (1934).
    [CrossRef]
  4. E. A. Nesbitt, J. Appl. Phys. 40, 1259 (1969).
    [CrossRef]

1969 (1)

E. A. Nesbitt, J. Appl. Phys. 40, 1259 (1969).
[CrossRef]

1968 (1)

E. A. Nesbitt et al., Appl. Phys. Lett. 12, 361 (1968).
[CrossRef]

1964 (1)

C. B. Rubenstein, W. H. Grodkiewicz, L. G. Van Uitert, J. Appl. Phys. 35, 3069 (1964).
[CrossRef]

1934 (1)

J. H. van Vleck, M. H. Hebb, Phys. Rev. 46, 17 (1934).
[CrossRef]

Grodkiewicz, W. H.

C. B. Rubenstein, W. H. Grodkiewicz, L. G. Van Uitert, J. Appl. Phys. 35, 3069 (1964).
[CrossRef]

Hebb, M. H.

J. H. van Vleck, M. H. Hebb, Phys. Rev. 46, 17 (1934).
[CrossRef]

Nesbitt, E. A.

E. A. Nesbitt, J. Appl. Phys. 40, 1259 (1969).
[CrossRef]

E. A. Nesbitt et al., Appl. Phys. Lett. 12, 361 (1968).
[CrossRef]

Rubenstein, C. B.

C. B. Rubenstein, W. H. Grodkiewicz, L. G. Van Uitert, J. Appl. Phys. 35, 3069 (1964).
[CrossRef]

Van Uitert, L. G.

C. B. Rubenstein, W. H. Grodkiewicz, L. G. Van Uitert, J. Appl. Phys. 35, 3069 (1964).
[CrossRef]

van Vleck, J. H.

J. H. van Vleck, M. H. Hebb, Phys. Rev. 46, 17 (1934).
[CrossRef]

Appl. Phys. Lett. (1)

E. A. Nesbitt et al., Appl. Phys. Lett. 12, 361 (1968).
[CrossRef]

J. Appl. Phys. (2)

C. B. Rubenstein, W. H. Grodkiewicz, L. G. Van Uitert, J. Appl. Phys. 35, 3069 (1964).
[CrossRef]

E. A. Nesbitt, J. Appl. Phys. 40, 1259 (1969).
[CrossRef]

Phys. Rev. (1)

J. H. van Vleck, M. H. Hebb, Phys. Rev. 46, 17 (1934).
[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

Cutaway view of the optical isolator.

Fig. 2
Fig. 2

(a) Magnetic field vs spacing of a pair of rare-earth button magnets having 0.254-cm holes through center. Field was measured between magnets in the region of the holes. (b) Energy product BD vs spacing for the same magnets.

Fig. 3
Fig. 3

Photograph of optical isolator and holder.

Tables (2)

Tables Icon

Table I Field vs Wavelength for TAG and Lead Glass

Tables Icon

Table II Rotation vs Wavelength for a TAG Rod 1 cm Long

Equations (1)

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θ = B k l ,

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