Abstract

A new type of mode recoupling in a Bragg grating pair, in which one of the gratings is written in the fiber cladding, is proposed to overcome limitations of concatenated long-period and fiber Bragg gratings reported earlier [Opt. Lett. 27, 1214 (2002)]. Its reflection spectrum is similar to that of the previously reported concatenated grating structure; however, the reflectivity can be much larger than the previous limitation of 50%. Furthermore, avoidance of the loss induced by a long-period grating makes such a Bragg grating pair more attractive for practical applications.

© 2003 Optical Society of America

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References

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  1. K. O. Hill and G. Meltz, J. Lightwave Technol. 15, 1263 (1997).
    [CrossRef]
  2. D. S. Starodubov, V. Grubsky, and J. Feinberg, IEEE Photon. Technol. Lett. 10, 1590 (1998).
    [CrossRef]
  3. F. Ouellette, P. A. Krug, T. Stephens, G. Dhosi, and B. Eggleton, Electron. Lett. 31, 899 (1995).
    [CrossRef]
  4. A. P. Zhang, X. M. Tao, W. H. Chung, B. O. Guan, and H. Y. Tam, Opt. Lett. 27, 1214 (2002).
    [CrossRef]
  5. G. Brambilla and V. Pruneri, IEEE J. Sel. Top. Quantum Electron. 7, 403 (2001).
    [CrossRef]
  6. T. Erdogan, J. Opt. Soc. Am. A 14, 1760 (1997).
    [CrossRef]

2002 (1)

2001 (1)

G. Brambilla and V. Pruneri, IEEE J. Sel. Top. Quantum Electron. 7, 403 (2001).
[CrossRef]

1998 (1)

D. S. Starodubov, V. Grubsky, and J. Feinberg, IEEE Photon. Technol. Lett. 10, 1590 (1998).
[CrossRef]

1997 (2)

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

K. O. Hill and G. Meltz, J. Lightwave Technol. 15, 1263 (1997).
[CrossRef]

1995 (1)

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

Brambilla, G.

G. Brambilla and V. Pruneri, IEEE J. Sel. Top. Quantum Electron. 7, 403 (2001).
[CrossRef]

Chung, W. H.

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.

Feinberg, J.

D. S. Starodubov, V. Grubsky, and J. Feinberg, IEEE Photon. Technol. Lett. 10, 1590 (1998).
[CrossRef]

Grubsky, V.

D. S. Starodubov, V. Grubsky, and J. Feinberg, IEEE Photon. Technol. Lett. 10, 1590 (1998).
[CrossRef]

Guan, B. O.

Hill, K. O.

K. O. Hill and G. Meltz, J. Lightwave Technol. 15, 1263 (1997).
[CrossRef]

Krug, P. A.

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

Meltz, G.

K. O. Hill and G. Meltz, J. Lightwave Technol. 15, 1263 (1997).
[CrossRef]

Ouellette, F.

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

Pruneri, V.

G. Brambilla and V. Pruneri, IEEE J. Sel. Top. Quantum Electron. 7, 403 (2001).
[CrossRef]

Starodubov, D. S.

D. S. Starodubov, V. Grubsky, and J. Feinberg, IEEE Photon. Technol. Lett. 10, 1590 (1998).
[CrossRef]

Stephens, T.

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

Tam, H. Y.

Tao, X. M.

Zhang, A. P.

Electron. Lett. (1)

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

IEEE J. Sel. Top. Quantum Electron. (1)

G. Brambilla and V. Pruneri, IEEE J. Sel. Top. Quantum Electron. 7, 403 (2001).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

D. S. Starodubov, V. Grubsky, and J. Feinberg, IEEE Photon. Technol. Lett. 10, 1590 (1998).
[CrossRef]

J. Lightwave Technol. (1)

K. O. Hill and G. Meltz, J. Lightwave Technol. 15, 1263 (1997).
[CrossRef]

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

Opt. Lett. (1)

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Figures (5)

Fig. 1
Fig. 1

Mode coupling in the novel Bragg grating pair: a, conventional Bragg reflection; b, cladding-mode-assisted recoupling.

Fig. 2
Fig. 2

Measured (solid curve) and calculated (dashed curve) transmission spectra of a strong fiber Bragg grating. Insets, electric mode distributions of cladding mode j=5 and guided mode j=0.

Fig. 3
Fig. 3

Calculated growth of reflectivity with increasing index modulation: a, reflectivity RA5-5 at wavelength 1546.7 nm; b, reflectivity RA at wavelength 1550.4 nm.

Fig. 4
Fig. 4

Calculated reflection spectra of FBG-A and FBG-B: a, reflection spectrum RB0-j of FBG-B with j=1,3,5; b, reflection spectrum RA5-5 of FBG-A; c, reflection spectrum RA3-3 of FBG-A.

Fig. 5
Fig. 5

Simulated reflection spectrum of the novel Bragg grating pair. The measured reflection spectrum of concatenated long-period and fiber Bragg gratings is shown in the inset for comparison.

Equations (6)

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λB0-j=neff0+neffjΛB,
ΛA=ΛBλB0-j2λB0-j-λB,
Rj-kκjk,
κjk=ω4Aej*x,yΔϵekx,ydxdy,
Rr=RB0-jRAj-jRBj-0    j0,
ΔλˆAΔλ˜B=2λB0-j2λB0-j-λB2,

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