Abstract

A prototype fail-safe optical data bus utilizing active LiTaO3 electrooptic mirror terminals has been constructed and tested. Features of the system include (1) a single optical source; (2) an optical insertion loss of less than 6 dB and a tapoff ratio of 13 dB for the mirror terminals in the fail-safe mode; (3) compatibility with commercially available LED sources, P-I-N photodiode detectors, and step-index multimode monofibers; (4) remote terminal modulation depth approaching 50% for 100 V applied; and (5) the use of a pulse transformer technique which allows the required electrooptic modulation voltages to be obtained from a 5-V electrical supply. The construction of a working prototype data bus using mirror terminals demonstrates the feasibility of such systems for use in optical communications at the present state of the art.

© 1978 Optical Society of America

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References

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  1. T. G. Giallorenzi, A. F. Milton, AGARD Conference Preprint 219, 18-1 (1977).
  2. A. F. Milton, U.S. Patent4,002,898 (11January1977).
  3. M. K. Barnowski, Appl. Opt. 14, 2571 (1975).
    [CrossRef]
  4. M. C. Hudson, F. L. Thiel, Appl. Opt. 13, 2540 (1974).
    [CrossRef] [PubMed]
  5. K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
    [CrossRef]
  6. B. S. Kawasaki, K. O. Hill, Appl. Opt. 16, 1794 (1977).
    [CrossRef] [PubMed]
  7. A. R. Nelson, D. H. McMahon, R. L. Gravel, Appl. Phys. Lett. 28, 321 (1976).
    [CrossRef]
  8. R. A. Soref, D. H. McMahon, A. R. Nelson, Appl. Phys. Lett. 28, 716 (1976).
    [CrossRef]
  9. R. A. Soref, A. R. Nelson, Appl. Opt. 16, 119 (1977).
    [CrossRef] [PubMed]
  10. R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
    [CrossRef]

1978

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

1977

R. A. Soref, A. R. Nelson, Appl. Opt. 16, 119 (1977).
[CrossRef] [PubMed]

B. S. Kawasaki, K. O. Hill, Appl. Opt. 16, 1794 (1977).
[CrossRef] [PubMed]

T. G. Giallorenzi, A. F. Milton, AGARD Conference Preprint 219, 18-1 (1977).

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[CrossRef]

1976

A. R. Nelson, D. H. McMahon, R. L. Gravel, Appl. Phys. Lett. 28, 321 (1976).
[CrossRef]

R. A. Soref, D. H. McMahon, A. R. Nelson, Appl. Phys. Lett. 28, 716 (1976).
[CrossRef]

1975

1974

Barnowski, M. K.

Giallorenzi, T. G.

T. G. Giallorenzi, A. F. Milton, AGARD Conference Preprint 219, 18-1 (1977).

Gravel, R. L.

A. R. Nelson, D. H. McMahon, R. L. Gravel, Appl. Phys. Lett. 28, 321 (1976).
[CrossRef]

Hill, K. O.

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[CrossRef]

B. S. Kawasaki, K. O. Hill, Appl. Opt. 16, 1794 (1977).
[CrossRef] [PubMed]

Hudson, M. C.

Johnson, D. C.

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[CrossRef]

Kawasaki, B. S.

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[CrossRef]

B. S. Kawasaki, K. O. Hill, Appl. Opt. 16, 1794 (1977).
[CrossRef] [PubMed]

McMahon, D. H.

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

A. R. Nelson, D. H. McMahon, R. L. Gravel, Appl. Phys. Lett. 28, 321 (1976).
[CrossRef]

R. A. Soref, D. H. McMahon, A. R. Nelson, Appl. Phys. Lett. 28, 716 (1976).
[CrossRef]

Milton, A. F.

T. G. Giallorenzi, A. F. Milton, AGARD Conference Preprint 219, 18-1 (1977).

A. F. Milton, U.S. Patent4,002,898 (11January1977).

Nelson, A. R.

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

R. A. Soref, A. R. Nelson, Appl. Opt. 16, 119 (1977).
[CrossRef] [PubMed]

A. R. Nelson, D. H. McMahon, R. L. Gravel, Appl. Phys. Lett. 28, 321 (1976).
[CrossRef]

R. A. Soref, D. H. McMahon, A. R. Nelson, Appl. Phys. Lett. 28, 716 (1976).
[CrossRef]

Sheppard, L. E.

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

Soref, R. A.

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

R. A. Soref, A. R. Nelson, Appl. Opt. 16, 119 (1977).
[CrossRef] [PubMed]

R. A. Soref, D. H. McMahon, A. R. Nelson, Appl. Phys. Lett. 28, 716 (1976).
[CrossRef]

Spillman, W. B.

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

Thiel, F. L.

AGARD Conference Preprint

T. G. Giallorenzi, A. F. Milton, AGARD Conference Preprint 219, 18-1 (1977).

Appl. Opt.

Appl. Phys. Lett.

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[CrossRef]

A. R. Nelson, D. H. McMahon, R. L. Gravel, Appl. Phys. Lett. 28, 321 (1976).
[CrossRef]

R. A. Soref, D. H. McMahon, A. R. Nelson, Appl. Phys. Lett. 28, 716 (1976).
[CrossRef]

R. A. Soref, A. R. Nelson, D. H. McMahon, W. B. Spillman, L. E. Sheppard, Appl. Phys. Lett. 32 (7), 408 (1978).
[CrossRef]

Other

A. F. Milton, U.S. Patent4,002,898 (11January1977).

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Figures (10)

Fig. 1
Fig. 1

Loop-type unidirectional optical data bus.

Fig. 2
Fig. 2

Top view of an electrooptic waveguide with a cylindrical mirror and a flat input/output end.

Fig. 3
Fig. 3

Perspective view of a completed mirror terminal.

Fig. 4
Fig. 4

Modulation depth as a function of voltage for three mirror terminals with theoretical curves for three different electrode widths.

Fig. 5
Fig. 5

(a) Loss due to area mismatch as a function of the fiber diameter/device thickness ratio. (b) Loss due to finite fiber N.A. as a function of input/output fiber separation.

Fig. 6
Fig. 6

Experimental setup.

Fig. 7
Fig. 7

Voltage dependence of the optical insertion loss, tapoff ratio, and modulation depth of mirror terminal MT-11.

Fig. 8
Fig. 8

Block diagram of prototype fail-safe optical data bus.

Fig. 9
Fig. 9

Data bus signal detected at (a) remote terminal 1, (b) remote terminal 2, and (c) the master terminal, with LED driver current pulse (d).

Fig. 10
Fig. 10

Signals from remote terminal 1 detected by the master terminal (a) before the comparator circuit and (b) after the comparator circuit.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

n = 1 2 n z 3 r 33 V / t + n z ( TM ) ,
n = 1 2 n x 3 r V / t + n x ( TE ) ,
E = V / t [ 1 ( d / 254 ) 2 ] ,

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