Abstract

Planar gradient-index glass waveguides with nearly circular cross sections have been fabricated by the ion migration method. A low-loss branched circuit and star coupler are demonstrated.

© 1984 Optical Society of America

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References

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  1. E. G. Rawson, A. B. Nafarrate, Electron. Lett. 14, 274 (1978).
    [CrossRef]
  2. R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
    [CrossRef]
  3. T. Kurokawa, N. Takato, Y. Katayama, Appl. Opt. 19, 3124 (1980).
    [CrossRef] [PubMed]
  4. G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.
  5. T. Izawa, H. Nakagome, Appl. Phys. Lett. 21, 584 (1972).
    [CrossRef]
  6. Japanese patent application under provisional publication no. 58-136007.

1980 (2)

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

T. Kurokawa, N. Takato, Y. Katayama, Appl. Opt. 19, 3124 (1980).
[CrossRef] [PubMed]

1978 (1)

E. G. Rawson, A. B. Nafarrate, Electron. Lett. 14, 274 (1978).
[CrossRef]

1972 (1)

T. Izawa, H. Nakagome, Appl. Phys. Lett. 21, 584 (1972).
[CrossRef]

Asawa, C. K.

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Friedrich, H. R.

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Gorre, L. E.

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Ishikawa, R.

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

Izawa, T.

T. Izawa, H. Nakagome, Appl. Phys. Lett. 21, 584 (1972).
[CrossRef]

Kaede, K.

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

Katayama, Y.

Kurokawa, T.

Matsushita, S.

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

Minemura, K.

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

Nafarrate, A. B.

E. G. Rawson, A. B. Nafarrate, Electron. Lett. 14, 274 (1978).
[CrossRef]

Nakagome, H.

T. Izawa, H. Nakagome, Appl. Phys. Lett. 21, 584 (1972).
[CrossRef]

Nishimoto, H.

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

Persechini, D. L.

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Ramer, O. G.

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Rawson, E. G.

E. G. Rawson, A. B. Nafarrate, Electron. Lett. 14, 274 (1978).
[CrossRef]

Takato, N.

Tangonan, G. L.

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Appl. Opt. (1)

Appl. Phys. Lett. (1)

T. Izawa, H. Nakagome, Appl. Phys. Lett. 21, 584 (1972).
[CrossRef]

Electron. Lett. (2)

E. G. Rawson, A. B. Nafarrate, Electron. Lett. 14, 274 (1978).
[CrossRef]

R. Ishikawa, K. Kaede, H. Nishimoto, K. Minemura, S. Matsushita, Electron. Lett. 16, 248 (1980).
[CrossRef]

Other (2)

G. L. Tangonan, O. G. Ramer, H. R. Friedrich, C. K. Asawa, D. L. Persechini, L. E. Gorre in Technical Digest, Fifth European Conference on Optical Communication, Amsterdam (1979), paper 21.5-1.

Japanese patent application under provisional publication no. 58-136007.

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Figures (10)

Fig. 1
Fig. 1

Schematic diagram of fabricating planar gradient-index glass waveguide.

Fig. 2
Fig. 2

Interference pattern of a cross section of the waveguide.

Fig. 3
Fig. 3

Schematic patterns of branching circuit.

Fig. 4
Fig. 4

Coupling ratio and excess loss caused by different branch angles.

Fig. 5
Fig. 5

Schematic structure of a 4-port branched circuit.

Fig. 6
Fig. 6

Photograph of a two-branched waveguide in which a He–Ne laser beam is launching.

Fig. 7
Fig. 7

Interference patterns at the six different cross sections of the branching waveguide.

Fig. 8
Fig. 8

Near-field patterns of a 4-port branched circuit.

Fig. 9
Fig. 9

Schematic structure of a 4-port star coupler.

Fig. 10
Fig. 10

Insertion losses dependency of a 4-port star coupler on the choice of input ports.

Tables (1)

Tables Icon

Table I Insertion Losses and Distributed Intensity Ratio of a 4-Port Branched Circuit a

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