Abstract

We demonstrate that under certain conditions it is possible to fabricate in a BGe co-doped fiber an arc-induced long-period grating whose spectrum contains a dual set of resonances. These two sets of resonances are formed by distinct mechanisms and are caused by coupling to cladding modes of different symmetries. They behave differently at high temperatures: the set produced by symmetric perturbation disappears during annealing at a temperature of 800°C, while the other set produced by an antisymmetric mechanism can withstand temperatures above 1000°C.

© 2007 Optical Society of America

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References

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  1. G. Rego, O. Ivanov, and P. V. S. Marques, Opt. Express 14, 9594 (2006).
    [CrossRef] [PubMed]
  2. O. Ivanov and G. Rego, 'Origin of coupling to antisymmetric modes in arc-induced long-period fiber gratings,' Opt. Express (to be published).
    [PubMed]
  3. C.-S. Kim, Y. Han, B. H. Lee, W.-T. Han, U.-C. Paek, and Y. Chung, Opt. Commun. 185, 337 (2000).
    [CrossRef]
  4. V. Grubsky and J. Feinberg, Opt. Lett. 30, 1279 (2005).
    [CrossRef] [PubMed]
  5. G. Rego, P. V. S. Marques, J. L. Santos, and H. M. Salgado, in Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides (Optical Society of America, 2003), paper MD23, p. 121.
  6. G. Rego, P. V. S. Marques, H. M. Salgado, and J. L. Santos, Fiber Integr. Opt. 24, 245 (2005).
    [CrossRef]
  7. G. Rego, J. L. Santos, and H. M. Salgado, Opt. Commun. 262, 152 (2006).
    [CrossRef]

2006

G. Rego, O. Ivanov, and P. V. S. Marques, Opt. Express 14, 9594 (2006).
[CrossRef] [PubMed]

G. Rego, J. L. Santos, and H. M. Salgado, Opt. Commun. 262, 152 (2006).
[CrossRef]

2005

V. Grubsky and J. Feinberg, Opt. Lett. 30, 1279 (2005).
[CrossRef] [PubMed]

G. Rego, P. V. S. Marques, H. M. Salgado, and J. L. Santos, Fiber Integr. Opt. 24, 245 (2005).
[CrossRef]

2000

C.-S. Kim, Y. Han, B. H. Lee, W.-T. Han, U.-C. Paek, and Y. Chung, Opt. Commun. 185, 337 (2000).
[CrossRef]

Fiber Integr. Opt.

G. Rego, P. V. S. Marques, H. M. Salgado, and J. L. Santos, Fiber Integr. Opt. 24, 245 (2005).
[CrossRef]

Opt. Commun.

G. Rego, J. L. Santos, and H. M. Salgado, Opt. Commun. 262, 152 (2006).
[CrossRef]

C.-S. Kim, Y. Han, B. H. Lee, W.-T. Han, U.-C. Paek, and Y. Chung, Opt. Commun. 185, 337 (2000).
[CrossRef]

Opt. Express

G. Rego, O. Ivanov, and P. V. S. Marques, Opt. Express 14, 9594 (2006).
[CrossRef] [PubMed]

O. Ivanov and G. Rego, 'Origin of coupling to antisymmetric modes in arc-induced long-period fiber gratings,' Opt. Express (to be published).
[PubMed]

Opt. Lett.

Other

G. Rego, P. V. S. Marques, J. L. Santos, and H. M. Salgado, in Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides (Optical Society of America, 2003), paper MD23, p. 121.

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Figures (4)

Fig. 1
Fig. 1

Grating spectrum with a dual set of resonances.

Fig. 2
Fig. 2

Spectral evolution of a pair of grating resonances during annealing at 800 ° C for 20 min .

Fig. 3
Fig. 3

Behavior of the resonance wavelengths and attenuation losses of three grating resonances during annealing (a) at 800 ° C for 62 min and (b) at temperature increasing from 800 up to 1000 ° C for 36 min . The curves with circles, triangles, and squares represent the thermal evolution of the three pairs of resonances in the spectrum shown in Fig. 1. The empty and filled symbols belong to symmetric and antisymmetric modes, respectively.

Fig. 4
Fig. 4

Grating spectrum after annealing at temperature increasing from 800 up to 990 ° C for 24 min .

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