Abstract

Bragg Gratings (BGs) have been written within either H2-loaded or UV-hypersensitized phosphorous-germanium co-doped silica planar waveguides through exposure to light at 248 nm. The stability of these BGs has been investigated by means of isochronal annealing experiments. It appears that the stability of both the modulation and the Bragg wavelength is higher in the hydrogenated waveguides than in the hypersensitized counterparts. Moreover, in the case of BGs in the UV-hypersensitized waveguides, the rate of the strength decay depends on the initial amplitude of the refractive index modulation whereas no significant difference could be observed in H2-loaded waveguides. It is shown that the master-curve formalism can be used to predicting an isothermal decay of both reflectivity and Bragg wavelengths of BGs written in the H2-loaded waveguides. This conclusion is illustrated by the fairly nice agreement that exits between the results of an isothermal annealing experiment and those predicted by use of the master-curve.

© 2005 Optical Society of America

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Appl. Opt.

Appl. Phys. Lett.

B. Malo, J. Albert, F. Bilodeau, T. Kitagawa, D.C. Johnson, K.O. Hill, K. Hattori, Y. Hibino and S. Gujrathi, �??Photosensitivity in phosphorous-doped silica glass and optical waveguides,�?? Appl. Phys. Lett. 65, 394-396 (1994).
[CrossRef]

T.A. Strasser, T. Erdogan, A.E. White, V. Mizrahi and P.J. Lemaire, �??Ultraviolet laser fabrication of strong, nearly polarization-independent Bragg reflectors in germanium-doped silica waveguides on silica substrates,�?? Appl. Phys. Lett. 65, 3308-3310 (1994).
[CrossRef]

Electron. Lett.

Y. Yamada, A. Takagi, I. Ogawa, M. Kawachi and M. Kobayashi, �??Silica based-optical waveguide on terraced silicon substrate as hybrid integration platform,�?? Electron. Lett. 29, 444-446 (1993).
[CrossRef]

R.M. Atkins, P.J. Lemaire, T. Erdogan and V. Mizrahi, �??Mechanisms of enhanced UV photosensitivity via hydrogen loading in germanosilicate glasses,�?? Electron. Lett. 29, 1234-1235 (1993).
[CrossRef]

D. Ramecourt, P. Niay, P. Bernage, I. Riant and M. Douay, �??Growth of strength of Bragg gratings written in H2-loaded telecommunication fibre during CW UV post-exposure,�?? Electron. Lett. 35, 329-331 (1999).
[CrossRef]

M. Kawachi, M.Yasu and T. Edahiro, �??Fabrication of SiO �??TiO glass planar optical waveguides by flame hydrolysis deposition,�?? Electron. Lett. 19, 583�??584 (1983).
[CrossRef]

IEEE Photonics Technol. Lett.

B.O. Guan, H.Y. Tam, X.M. Tao and X.Y. Dong, �??Highly stable fiber Bragg gratings written in hydrogen-loaded fiber,�?? IEEE Photonics Technol. Lett. 12, 1349-1351 (2000).
[CrossRef]

Y. Hibino, T. Kitagawa, K.O. Hill, F. Bilodeau, B. Malo, J. Albert, D.C. Johnson, , �??Wavelength division multiplexer with photoinduced Bragg gratings fabricated in a planar-ligthwave-waveguide-type asymmetric Mach-Zender interferometer on Si,�?? IEEE Photonics Technol. Lett. 8, 84-86 (1996).
[CrossRef]

J. Appl. Phys.

H. Patrick, S.L. Gilbert, A. Lidgard and M.D. Gallagher, �??Annealing of Bragg gratings in hydrogen-loaded optical fiber,�?? J. Appl. Phys. 78, 2940-2945 (1995).
[CrossRef]

T. Erdogan, V. Mizrahi, P. Monroe, �??Decay of ultraviolet-induced fiber Bragg gratings,�?? J. Appl. Phys. 76, 73-80 (1994).
[CrossRef]

J. Lightwave Technol.

J. Non-Cryst. Sol.

B. Poumellec, �??Links between writing and erasure (or stability) of Bragg gratings in disordered media,�?? J. Non-Cryst. Sol. 239, 108-115 (1998).
[CrossRef]

Meas. Sci. Technol.

J. Canning, K. Sommer and M. Englund, �??Fibre gratings for high temperature sensor applications,�?? Meas. Sci. Technol. 12, 824-828 (2001).
[CrossRef]

OFC 1999

C.K. Madsen, L. Adams, R. Scotti, A. Bruce, M. Capuzzo, L. Gomez, and E. Laskowski, "A multi-port add/drop router using UV-induced gratings in planar waveguides," Optical Fiber Communication Conference (OFC�??99), paper ThH3 (1999).

G.E. Kohnke, D.W. Nightingale, P.G. Wigley and C.R. Pollock, �??Photosensitization of optical fiber by UV exposure of hydrogen loaded fiber,�?? Optical Fiber Communication Conference (OFC�??99), paper PD20 (1999).

Opt. Lett.

Other

B. Leconte, PhD. thesis n°2379, University of Lille, France, available on request (1998).

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