Abstract

A novel interferometric accelerometer is described and demonstrated by using a two-mode, elliptical-core optical fiber. A loop of fiber bends when subjected to acceleration normal to its plane, which causes a differential phase shift between the LP01 and LP11 modes. This optical phase shift is directly measured at the output of a phase-sensitive detector by using an in-fiber double-frequency conversion technique. Preliminary results indicate a scale factor of 2 rad/g, with a sensitivity and bias stability of 30 mg. Signal-processing electronics employed to measure the rotation rate in a fiber gyroscope could potentially be used to reduce short-term noise to the 1–10-μg range. Cross talk between the sensitive axis and one of the transverse axes is virtually null.

© 1992 Optical Society of America

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References

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  1. J. N. Blake, B. Y. Kim, H. J. Shaw, Proc. Soc. Photo-Opt. Instrum. Eng. 719, 92 (1986).
  2. H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
    [CrossRef]
  3. O. Lisbôa, J. N. Blake, J. E. B. Oliveira, S. L. A. Carrara, Proc. Soc. Photo-Opt. Instrum. Eng. 1267, 17 (1990).
  4. K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
    [CrossRef]
  5. O. Lisbôa, S. L. A. Carrara, Opt. Lett. 17, 154 (1992).
    [CrossRef] [PubMed]
  6. S. R. M. Carneiro, F. A. Castro, O. Lisbôa, S. L. A. Carrara, Opt. Lett. 17, 831 (1992).
    [CrossRef] [PubMed]
  7. S. Huang, J. N. Blake, B. Y. Kim, IEEE J. Lightwave Technol. 8, 23 (1990).
    [CrossRef]

1992 (2)

1990 (3)

S. Huang, J. N. Blake, B. Y. Kim, IEEE J. Lightwave Technol. 8, 23 (1990).
[CrossRef]

O. Lisbôa, J. N. Blake, J. E. B. Oliveira, S. L. A. Carrara, Proc. Soc. Photo-Opt. Instrum. Eng. 1267, 17 (1990).

K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
[CrossRef]

1988 (1)

H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

1986 (1)

J. N. Blake, B. Y. Kim, H. J. Shaw, Proc. Soc. Photo-Opt. Instrum. Eng. 719, 92 (1986).

Blake, J. N.

O. Lisbôa, J. N. Blake, J. E. B. Oliveira, S. L. A. Carrara, Proc. Soc. Photo-Opt. Instrum. Eng. 1267, 17 (1990).

S. Huang, J. N. Blake, B. Y. Kim, IEEE J. Lightwave Technol. 8, 23 (1990).
[CrossRef]

H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

J. N. Blake, B. Y. Kim, H. J. Shaw, Proc. Soc. Photo-Opt. Instrum. Eng. 719, 92 (1986).

Carneiro, S. R. M.

Carrara, S. L. A.

Castro, F. A.

Claus, R. O.

K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
[CrossRef]

Engan, H. E.

H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

Huang, S.

S. Huang, J. N. Blake, B. Y. Kim, IEEE J. Lightwave Technol. 8, 23 (1990).
[CrossRef]

Kim, B. Y.

S. Huang, J. N. Blake, B. Y. Kim, IEEE J. Lightwave Technol. 8, 23 (1990).
[CrossRef]

H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

J. N. Blake, B. Y. Kim, H. J. Shaw, Proc. Soc. Photo-Opt. Instrum. Eng. 719, 92 (1986).

Lisbôa, O.

Miller, M. S.

K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
[CrossRef]

Murphy, K. A.

K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
[CrossRef]

Oliveira, J. E. B.

O. Lisbôa, J. N. Blake, J. E. B. Oliveira, S. L. A. Carrara, Proc. Soc. Photo-Opt. Instrum. Eng. 1267, 17 (1990).

Shaw, H. J.

H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

J. N. Blake, B. Y. Kim, H. J. Shaw, Proc. Soc. Photo-Opt. Instrum. Eng. 719, 92 (1986).

Vengsarkar, A. M.

K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
[CrossRef]

IEEE J. Lightwave Technol. (3)

H. E. Engan, B. Y. Kim, J. N. Blake, H. J. Shaw, IEEE J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

K. A. Murphy, M. S. Miller, A. M. Vengsarkar, R. O. Claus, IEEE J. Lightwave Technol. 8, 1688 (1990).
[CrossRef]

S. Huang, J. N. Blake, B. Y. Kim, IEEE J. Lightwave Technol. 8, 23 (1990).
[CrossRef]

Opt. Lett. (2)

Proc. Soc. Photo-Opt. Instrum. Eng. (2)

O. Lisbôa, J. N. Blake, J. E. B. Oliveira, S. L. A. Carrara, Proc. Soc. Photo-Opt. Instrum. Eng. 1267, 17 (1990).

J. N. Blake, B. Y. Kim, H. J. Shaw, Proc. Soc. Photo-Opt. Instrum. Eng. 719, 92 (1986).

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Figures (2)

Fig. 1
Fig. 1

Experimental setup. The sensing fiber between two acousto-optic frequency shifters forms a half-loop. Bending the loop up and down causes a bipolar phase shift between the LP01 and LP11 modes. This phase shift is translated into an electrical signal at frequency ω2ω1 at a P-I-N photodetector and is a measurement of the displacement at the midpoint M.

Fig. 2
Fig. 2

Differential phase shift measured with the setup in Fig. 1 as it is rotated about the z axis for three different accelerometer configurations as shown in Table 1. Correlation of the data points with the expected sinusoidal behavior is 0.998. Correlation with a quadrature sinusoidal curve is smaller than 10−4, which indicates low cross talk between the x and y axes for acceleration sensitivity.

Tables (1)

Tables Icon

Table 1 Characteristics of the Accelerometers Measured

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