Abstract

Return loss, a key characteristic of the optical add/drop multiplexer (OADM), has become an urgent and challenging problem in the development of the integrated grating-assisted OADM. In this paper, a novel design approach to achieve low-return-loss integrated grating-assisted OADMs is proposed. The reflective spectrum is properly controlled to ensure the backreflection peaks can fall outside the wavelength channel, so that the return loss can be kept low. Meanwhile, it can also be found that the tolerance in fabrication process is enlarged. Simulation on the null-coupler OADM shows that, by employing the proposed method, the return loss at both input-and add-port can drop to lower than -53 dB from -38 and 0 dB, respectively, and be kept below -53 dB even with a tilt angle ranging from 3.2 ° to 3.5°. The application of this method on the design of the symmetric-coupler OADM is also presented.

© 2005 IEEE

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  1. T. Erdogan, "Optical add-drop multiplexer based on an asymmetric Bragg coupler", Opt. Commun., vol. 157, pp. 249 -264, 1998.
  2. T. Erdogan, T. A. Strasser, M. A. Milbrodt, E. J. Laskowski, C. H. Henry and G. E. Kohnke, "Integrated-optical Mach-Zehnder add-drop filter fabricated by a single UV-induced grating exposure", Appl. Opt., vol. 36, pp. 7838-7845, 1997.
  3. R. Kashyap, G. D. Maxwell and B. J. Ainslie, "Laser-trimmed four-port bandpass filter fabricated in single-mode photosensitive Ge-doped planar waveguide", IEEE Photon. Technol. Lett., vol. 5, no. 2, pp. 191 -194, Feb. 1993.
  4. J.-P. Weber, "Spectral characteristics of coupled-waveguide Bragg-reflection tunable optical filter", Proc. Inst. Elect. Eng. J, vol. 140, no. 5, Oct. 1993.
  5. D. Mechin, P. Grosso and D. Bosc, "Add-drop multiplexer with UV-written Bragg gratings and directional coupler in SiO2 -Si integrated waveguides", J. Lightw. Technol., vol. 19, no. 9, pp. 1282-1286, Sep. 2001.
  6. C. Riziotis and M. N. Zervas, "Design considerations in optical add/drop multiplexers based on grating-assisted null couplers", J. Lightw. Technol., vol. 19, no. 1, pp. 92-104, Jan. 2001.
  7. G. Perrone, M. Laurenzano and I. Montrosset, "Design and feasibility of an innovative integrated grating-assisted add-drop multiplexer", J. Lightw. Technol., vol. 19, no. 12, pp. 1943-1948, Dec. 2001.
  8. R. M. Knox and P. P. Toulios, "Integrated circuits for the millimeter through optical frequency range", in Proc. MRI Symp. Submillimeter Waves, 1970, pp. 497-516.
  9. G. R. Hadley and R. E. Smith, "Full-vector wavelength modeling using an iterative finite-difference method with transparent boundary conditions", J. Lightw. Technol., vol. 13, no. 3, pp. 465-469, Mar. 1995.
  10. "BPM-CAD", Optiwave Corp., Canada . [Online]. Available: http://www.optiwave.com
  11. K. S. Chiang, "Dual effective-index method for the analysis of rectangular dielectric waveguides", Appl. Opt., vol. 25, pp. 2169-2174, Jul. 1986.
  12. S. H. Chuang, "A coupled mode formulation by reciprocity and a variational principle", J. Lightw. Technol., vol. LT-5, no. 1, pp. 5-15, Jan. 1987.

Appl. Opt. (2)

Other (10)

R. Kashyap, G. D. Maxwell and B. J. Ainslie, "Laser-trimmed four-port bandpass filter fabricated in single-mode photosensitive Ge-doped planar waveguide", IEEE Photon. Technol. Lett., vol. 5, no. 2, pp. 191 -194, Feb. 1993.

J.-P. Weber, "Spectral characteristics of coupled-waveguide Bragg-reflection tunable optical filter", Proc. Inst. Elect. Eng. J, vol. 140, no. 5, Oct. 1993.

D. Mechin, P. Grosso and D. Bosc, "Add-drop multiplexer with UV-written Bragg gratings and directional coupler in SiO2 -Si integrated waveguides", J. Lightw. Technol., vol. 19, no. 9, pp. 1282-1286, Sep. 2001.

C. Riziotis and M. N. Zervas, "Design considerations in optical add/drop multiplexers based on grating-assisted null couplers", J. Lightw. Technol., vol. 19, no. 1, pp. 92-104, Jan. 2001.

G. Perrone, M. Laurenzano and I. Montrosset, "Design and feasibility of an innovative integrated grating-assisted add-drop multiplexer", J. Lightw. Technol., vol. 19, no. 12, pp. 1943-1948, Dec. 2001.

R. M. Knox and P. P. Toulios, "Integrated circuits for the millimeter through optical frequency range", in Proc. MRI Symp. Submillimeter Waves, 1970, pp. 497-516.

G. R. Hadley and R. E. Smith, "Full-vector wavelength modeling using an iterative finite-difference method with transparent boundary conditions", J. Lightw. Technol., vol. 13, no. 3, pp. 465-469, Mar. 1995.

"BPM-CAD", Optiwave Corp., Canada . [Online]. Available: http://www.optiwave.com

T. Erdogan, "Optical add-drop multiplexer based on an asymmetric Bragg coupler", Opt. Commun., vol. 157, pp. 249 -264, 1998.

S. H. Chuang, "A coupled mode formulation by reciprocity and a variational principle", J. Lightw. Technol., vol. LT-5, no. 1, pp. 5-15, Jan. 1987.

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