OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 15 — Jul. 23, 2007
  • pp: 9645–9658

Realization of asymmetric optical filters using asynchronous coupled-microring resonators

Ashok M. Prabhu and Vien Van  »View Author Affiliations

Optics Express, Vol. 15, Issue 15, pp. 9645-9658 (2007)

View Full Text Article

Enhanced HTML    Acrobat PDF (197 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



General filter architectures based on asynchronously-tuned, coupled-microring resonators are proposed for realizing optical filters with asymmetric spectral responses. Asymmetric filters enable more complex spectral shapes to be realized which can better meet the demands of more advanced applications than symmetric filters. By adjusting individual transmission zeros of the filter transfer function, the transition bands on the low and high-frequency sides of the passband can be separately optimized to achieve an optimum filter response. A method for synthesizing asymmetric spectral responses based on the energy coupling matrix will also be presented along with numerical examples of high-order asymmetric optical filters. These devices represent new microring-based architectures that can be explored for advanced applications in optical spectral shaping and dispersion engineering.

© 2007 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Integrated Optics

Original Manuscript: May 7, 2007
Revised Manuscript: July 9, 2007
Manuscript Accepted: July 16, 2007
Published: July 19, 2007

Ashok M. Prabhu and Vien Van, "Realization of asymmetric optical filters using asynchronous coupled-microring resonators," Opt. Express 15, 9645-9658 (2007)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. J. V. Hryniewicz, P. P. Absil, B. E. Little, R. A. Wilson and P.-T. Ho, "Higher order filter response in coupled microring resonators," IEEE Photon. Technol. Lett. 12, 320-322 (2000). [CrossRef]
  2. B. E. Little, S. T. Chu, P. P. Absil, J. V. Hryniewicz, F. G. Johnson, F. Seiferth, D. Gill, V. Van, O. King and M. Trakalo, "Very high order microring resonator filters for WDM applications," IEEE Photon. Technol. Lett. 16, 2263-2265 (2004). [CrossRef]
  3. T. Barwicz, M. Popovic, P. Rakich, M. Watts, H. Haus, E. Ippen and H. Smith, "Microring-resonator-based add-drop filters in SiN: fabrication and analysis," Opt. Express 12, 1437-1442 (2004). [CrossRef] [PubMed]
  4. B. E. Little, S. T. Chu, J. V. Hryniewicz and P. P. Absil, "Filter synthesis for periodically coupled microring resonators," Opt. Lett. 25, 344-346 (2000). [CrossRef]
  5. R. Grover, V. Van, T. A. Ibrahim, P. P. Absil, L. C. Calhoun, F. G. Johnson, J. V. Hryniewicz and P.-T. Ho, "Parallel-cascaded semiconductor microring resonators for high-order and wide-FSR filters," J. Lightw. Technol. 20, 900-905 (2002). [CrossRef]
  6. K. Jinguji, "Synthesis of coherent two-port optical delay-line circuit with ring waveguides," J. Lightwave Technol. 14, 1882-1898 (1996). [CrossRef]
  7. C. K. Madsen, "Efficient architectures for exactly realizing optical filters with optimum bandpass design," IEEE Photon. Technol. Lett. 10, 1136-1138 (1998). [CrossRef]
  8. V. Van, "Synthesis of elliptic optical filters using mutually-coupled microring resonators," J. Lightw. Technol. 25, 584-590 (2007). [CrossRef]
  9. M. A. Prabhu and V. Van, "General two-dimensional coupled-cavity microring filter architectures," in IEEE Conference on Lasers and Electro-Optics, 2007, paper JTuA31.
  10. M. A. Popovic, "Sharply-defined optical filters and dispersionless delay lines based on loop-coupled resonators and ‘negative’ coupling," in IEEE Conference on Lasers and Electro-Optics, 2007, paper CThP6.
  11. H. C. Bell, "Canonical asymmetric coupled-resonator filters," IEEE Trans. Microwave Theory Technol. 30, 1335-1340 (1982). [CrossRef]
  12. A. E. Williams, J. I. Upshur and M. M. Rahman, "Asymmetric response bandpass filter having resonators with minimum couplings," U.S. patent 6337610 (2002).
  13. B. E. Little, S. T. Chu, H. A. Haus, J. Foresi and J.-P. Laine, "Microring resonator channel dropping filters," J. Lightw. Technol. 15, 998-1005 (1997). [CrossRef]
  14. A. E. Atia and A. E. Williams, "Narrow-bandpass waveguide filters," IEEE Trans. Microwave Theory Technol. 20, 258-265 (1972). [CrossRef]
  15. A. E. Atia, A. E. Williams and R. W. Newcomb, "Narrow-band multiple-coupled cavity synthesis," IEEE Trans. Circuits Syst. 21, 649-655 (1974). [CrossRef]
  16. M. H. Chen, "Singly terminated pseudo-elliptic function filter," COMSAT Technol. Rev. 7, 527-541 (1977).
  17. R. J. Cameron, "General coupling matrix synthesis methods for Chebyshev filtering functions," IEEE Trans. Microwave Theory Technol. 47, 433-442 (1999). [CrossRef]
  18. R. J. Cameron, "Advanced coupling matrix synthesis techniques for microwave filters," IEEE Trans. Microwave Theory Technol. 51, 1-10 (2003). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited