Abstract

We investigate new types of mode recouplings in a concatenated grating structure comprising a long-period grating and a fiber Bragg grating. It is demonstrated that the light coupled out to the cladding mode by one of these gratings can be recoupled back to the guided mode by the other grating. Theoretical analysis based on the coupled-mode theory is presented, together with experimental results.

© 2002 Optical Society of America

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References

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  1. A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
    [CrossRef]
  2. C. R. Giles, J. Lightwave Technol. 15, 1391 (1997).
    [CrossRef]
  3. T. Erdogan, J. Opt. Soc. Am. A 14, 1760 (1997).
    [CrossRef]
  4. F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
    [CrossRef]
  5. B. H. Lee and J. Nishii, Appl. Opt. 38, 3450 (1999).
    [CrossRef]
  6. H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
    [CrossRef]
  7. B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
    [CrossRef]

2001 (1)

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

1999 (1)

1997 (3)

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

C. R. Giles, J. Lightwave Technol. 15, 1391 (1997).
[CrossRef]

T. Erdogan, J. Opt. Soc. Am. A 14, 1760 (1997).
[CrossRef]

1996 (1)

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

1995 (1)

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

Askins, C. G.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

Chan, H. L. W.

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

Choy, C. L.

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

Davis, M. A.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

Demokan, M. S.

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

Dhosi, G.

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

Eggleton, B.

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

Erdogan, T.

Frielele, E. J.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

Giles, C. R.

C. R. Giles, J. Lightwave Technol. 15, 1391 (1997).
[CrossRef]

Guan, B. O.

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

Kersey, A. D.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

Koo, K. P.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

Krug, P. A.

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

LeBlanc, M.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

Lee, B. H.

Nishii, J.

Ouellette, F.

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

Patrick, H. J.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

Pedrazzani, J. R.

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

Putnam, M. A.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

Stephens, T.

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

Tam, H. Y.

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

Vengsarkar, A. M.

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

Williams, G. M.

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

Appl. Opt. (1)

Electron. Lett. (1)

F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

H. J. Patrick, G. M. Williams, A. D. Kersey, J. R. Pedrazzani, and A. M. Vengsarkar, IEEE Photon. Technol. Lett. 8, 1223 (1996).
[CrossRef]

J. Lightwave Technol. (2)

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Frielele, J. Lightwave Technol. 15, 1442 (1997).
[CrossRef]

C. R. Giles, J. Lightwave Technol. 15, 1391 (1997).
[CrossRef]

J. Opt. Soc. Am. A (1)

Meas. Sci. Technol. (1)

B. O. Guan, H. Y. Tam, H. L. W. Chan, C. L. Choy, and M. S. Demokan, Meas. Sci. Technol. 12, 818 (2001).
[CrossRef]

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Figures (5)

Fig. 1
Fig. 1

Recouplings of the coupled light to the backward guided mode in the concatenated LPG and FBG. a, backward cladding-mode-assisted recoupling; b, forward cladding-mode-assisted recoupling.

Fig. 2
Fig. 2

Measured (solid curve) transmission spectrum of a strong FBG before the formation of the LPG. The resonant wavelength λB5 is determined by comparison with the calculated result (dashed curve).

Fig. 3
Fig. 3

Measured transmission spectra of the FBG and weak LPG before (light curve) and after (dark curve) postexposure.

Fig. 4
Fig. 4

Reflection spectra of the concatenated LPG and FBG (solid curve) and the original FBG (dashed curve).

Fig. 5
Fig. 5

Reflection spectra of the concatenated LPG and the FBG. a, free gratings; b, gratings under tension; c, gratings under bending.

Equations (5)

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

λBj=neff0+neffjΛB,
λLj=neff0-neffjΛL,
λI,II=λB1-ΛBΛL+ΛB,
R˜B=TLj2RB0,
RI,II=2TLj1-TLjRBj.

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