Abstract

We present a novel optical bit-pattern-recognition technique that uses erbium-doped fiber at room temperature. Counterpropagating beams write a patterned gain-depletion grating in pumped erbium-doped fiber. This grating, recorded in the erbium gain medium, can be used for correlation with other optical bit patterns. We have demonstrated correlation of arbitrary return-to-zero bit patterns of as many as 8  bits at 1 Gbit/s. Theory suggests that scaling to higher bit rates is feasible.

© 1997 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. K. D. Merkel and W. R. Babbitt, Opt. Lett. 21, 71 (1996).
    [CrossRef] [PubMed]
  2. X. A. Shen and R. Kachru, Opt. Lett. 20, 2508 (1995).
    [CrossRef]
  3. Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
    [CrossRef]
  4. H. P. Sardesai and A. M. Weiner, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), paper CTHW3.
  5. B. Fischer, J. L. Zyskind, J. W. Sulhoff, and D. J. DiGiovanni, Opt. Lett. 18, 2108 (1993); Electron. Lett. 29, 1858 (1993).
    [CrossRef]
  6. J. S. Wey, “Experimental and theoretical studies of a harmonically modelocked erbium fiber ring laser,” Ph.D. dissertation (University of Maryland, College Park, Md., 1995).

1996 (1)

1995 (1)

1993 (1)

1984 (1)

Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
[CrossRef]

Babbit, W. R.

Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
[CrossRef]

Babbitt, W. R.

Bai, Y. S.

Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
[CrossRef]

Carlson, N. W.

Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
[CrossRef]

DiGiovanni, D. J.

Fischer, B.

Kachru, R.

Merkel, K. D.

Mossberg, T. W.

Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
[CrossRef]

Sardesai, H. P.

H. P. Sardesai and A. M. Weiner, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), paper CTHW3.

Shen, X. A.

Sulhoff, J. W.

Weiner, A. M.

H. P. Sardesai and A. M. Weiner, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), paper CTHW3.

Wey, J. S.

J. S. Wey, “Experimental and theoretical studies of a harmonically modelocked erbium fiber ring laser,” Ph.D. dissertation (University of Maryland, College Park, Md., 1995).

Zyskind, J. L.

Appl. Phys. Lett. (1)

Y. S. Bai, W. R. Babbit, N. W. Carlson, and T. W. Mossberg, Appl. Phys. Lett. 45, 714 (1984).
[CrossRef]

Opt. Lett. (3)

Other (2)

H. P. Sardesai and A. M. Weiner, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), paper CTHW3.

J. S. Wey, “Experimental and theoretical studies of a harmonically modelocked erbium fiber ring laser,” Ph.D. dissertation (University of Maryland, College Park, Md., 1995).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)

Fig. 1
Fig. 1

Principle of operation for writing, reading, and correlation with dynamic gratings in erbium-doped fiber. Counterpropagating reference and test patterns create a grating pattern in the EDF. After an interference grating is stored, it can be read out with a single pulse or correlated with a specific pattern.

Fig. 2
Fig. 2

Experimental configuration for writing, reading, and correlating bit sequences. The top path generates the reference pulses, and the bottom path creates the write and read patterns. The gratings are stored in and read out from the EDF. EDFA, erbium-doped fiber amplifier; WDM, wavelength-division multiplexing.

Fig. 3
Fig. 3

Experimental and theoretical results of power reflectance as a function of reading-pulse width. Theory and experimental data do not coincide because of polarization effects.

Fig. 4
Fig. 4

Readout of a short grating written in different locations in the EDF. The shaded region (round-trip time through the EDF) shows the relative location of the grating with respect to the EDF. Pulses reflected from the far end of the EDF experience double-pass gain and hence are larger in amplitude.

Fig. 5
Fig. 5

Reading and correlation of 4-bit RZ patterns at 500 Mbits/s. The top trace shows the single-pulse readout from the recorded pattern. The middle (bottom) trace is a correlation between the recorded and the identical (inverse) read patterns.

Fig. 6
Fig. 6

Correlation of the stored pattern with the identical (top) and the inverse (bottom) 8-bit RZ pattern at 1 Gbit/s.

Metrics