Advertisement

Springer Nature is making Coronavirus research free. View research | View latest news | Sign up for updates

A compact optical isolator using a Y3Fe5O12 crystal for near infra-red radiation

Abstract

Using a Y3Fe5O12 crystal as a Faraday rotator material, a samarium cobalt permanent magnet and two iron yokes, a compact optical isolator was constructed at 1.153μm for optical transmission systems. The developed isolator is 13 mm in diameter and 25 mm in length, including two polarizers. The isolator characteristics are 1.3 dB forward loss and greater than 30 dB backward loss. A broadband isolator is realized by inserting a 45 degree Faraday rotator and an optically active 45 degree quartz rotator between the two polarizers set at 90 degrees in relation to each other.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    H. Horiguch andH. Osanai,Electr. Lett. 12 (1976) 310–1.

  2. 2.

    S. D. Jacobs, K. J. Teegarden andR. K. Ahrenkiel,Appl. Opt. 13 (1974) 2313–6.

  3. 3.

    C. F. Padula andC. Gilbert Young,IEEE J. Quant. Electr. QE-3 (1967) 493–8.

  4. 4.

    F. J. Sansalon,Appl. Opt. 10 (1971) 2329–31.

  5. 5.

    D. J. Denz, R. C. Puttach andR. F. Belt, Confer. Magnet. Materi, Boston, Mass. (1973) Paper 4c-10.

  6. 6.

    A. Shibukawa, H. Iwamura, S. Hayashi andA. Katsui,Electr. Lett. 13 (1977) 721–2.

  7. 7.

    B. Johnson,Brit. J. Appl. Phys. 17 (1966) 1441–9.

  8. 8.

    D. L. Wood andJ. P. Remeika,J. Appl. Phys. 38 (1967) 1038–45.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Iwamura, H., Hayashi, S. & Iwasaki, H. A compact optical isolator using a Y3Fe5O12 crystal for near infra-red radiation. Opt Quant Electron 10, 393–398 (1978). https://doi.org/10.1007/BF00620305

Download citation

Keywords

  • Radiation
  • Iron
  • Quartz
  • Cobalt
  • Communication Network