2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

IEEE Journal of Lightwave Technology
Volume 18 Number 11, November 2000

Table of Contents for this issue

Complete paper in PDF format

Suppression of Cladding Mode Coupling Loss in Fiber Bragg Gratings

Liang Dong, Gang Qi, Marlene Marro, Vikram Bhatia, Lisa L. Hepburn, Martin Swan, Adam Collier and David L. Weidman

Page 1583.

Abstract:

We have demonstrated, for the first time, the suppression of cladding mode coupling loss to 0.1 dB in 30-dB fiber Bragg gratings for both nonhydrogenated and hydrogenated fibers. These fibers have also been optimized to give 0.04-dB average splice loss to SMF-28 fiber. The suppression of cladding mode coupling is achieved by accurately characterizing and controlling the photosensitive profile. This low level of cladding mode coupling loss has opened up a new range of broadband applications, previously restricted by the limited free spectral range of fiber Bragg gratings.

References

  1. E. Delevaque, S. Boj, J. F. Bayon, H. Poignant, J. Le Mellot, M. Monerie, P. Niay and P. Bernage, "Optical fiber design for strong gratings photo-imprinting with radiation mode suppression", Optical Fiber Communications Conference Technical Digest, vol. 8, 1995.
  2. L. Dong, L. Reekie, J. L. Cruz, J. E. Caplen, J. P. de Sandro and D. N. Payne, "Optical fibers with depressed claddings for suppression of coupling into cladding modes in fiber Bragg gratings", IEEE Photon. Technol. Lett., vol. 9, pp.  64-66, 1997.
  3. C. W. Haggans, H. Singh, W. F. Varner and J. S. Wang, "Narrow depressed cladding fiber design for minimization of cladding mode losses in azimuthally asymmetric fiber Bragg gratings", J. Lightwave Technol., vol. 16, pp.  902 -909, 1998.
  4. K. Oh, J. M. Kim, H. S. Seo, U. C. Paek, M. S. Kim and B. H. Chol, "Suppression of cladding mode coupling in Bragg gratings using GeO2 -B2 O3 codoped photosensitive cladding optical fiber", Electronics Letters, vol. 35, pp.  423-423, 1999.
  5. T. Erdogan, "Fiber grating spectra", J. of Lightwave Technol. , vol. 15, pp.  1277-1294, 1997.
  6. L. Dong, J. Pinkstone, P. St. J. Russell and D. N. Payne, "Ultraviolet absorption in modified chemical vapor deposition preforms", Journal of the Optical Society of American,B, vol. 11, pp.  2106-2111, 1994.
  7. P. J. Lemaire, A. M. Vensarkar, W. A. Reed and D. J. DiGiovanni, "Thermally enhanced ultraviolet photosensitivity in GeO2 and P2O5 doped optical fibers", Applied Physics Letters, vol. 66, pp.  2034-2036, 1995.
  8. D. L. Williams, B. J. Ainslie, J. R. Armitage, R. Kashyap and R. Campbell, "Enhanced UV photosensitivity in boron codoped germanosilicate fibers", Electronics Letters, vol. 29, pp.  45-47, 1993.
  9. P. J. Lemaire, "Enhanced UV photosensitivity in fibers and waveguides by high pressure hydrogen loading", Optical Communications Conference Technical Digest, vol. 8, pp.  162-163, 1995.