volume | PIER Journals

Abstract

A new approach to design digitally tunable optical filter system for DWDM (Dense Wavelength Division Multiplexed) optical networks is presented. This digitally tunable optical filter system uses semiconductor optical amplifiers (SOAs) and DWDM thin film filter based wavelength selection elements. The design is very easy to configure, expand and reduce. This digitally tunable optical filter system is smaller in size, lesser in weight, cheaper in costt, consumes low power and has better timing performance as compared to digitally tunable optical filter suggested by researchers recently.

1. Brooks, D. and S. Ruschin, "Integrated electro-optic multielectrode tunable filter," J. Lightwave Tech., Vol. 13, 1508-1513, 1995.
doi:10.1109/50.400719 Google Scholar

2. Wooten, E. L., R. L. Stone, E. W. Miles, and E. M. Bradely, "Rapidly tunable narrowband wavelength filter using LiNbO₃ unbalanced Mach-Zehnder interferometers," J. Lightwave Tech., Vol. 14, 2530-2536, 1996.
doi:10.1109/50.548151 Google Scholar

3. Oda, K., N. Yakato, T. Kominato, and H. Toba, "A 16-channel frequency selection switch for optical FDM distribution systems," IEEE J. Sel. Areas Commun., Vol. 8, 1132-1140, 1990.
doi:10.1109/49.57818 Google Scholar

4. Stone, J. and L. W. Stulz, "High-performance fiber Fabry-Perot filters," Electron. Lett., Vol. 27, 2239-2240, 1991.
doi:10.1049/el:19911385 Google Scholar

5. Born, M. and E.Wolf, Principles of Optics, 6th Ed., Pergamon, 1980.

6. Zirngibl, M., C. H. Joyner, and B. Glance, "Digitally tunable channel dropping filter/equalizer based on wave guide grating router and optical amplifier integration," IEEE Photonics Tech. Lett., Vol. 6, 513-515, 1994.
doi:10.1109/68.281812 Google Scholar

7. Ishida, O., H. Takahashi, and Y. Inoue, "Digitally tunable optical filters using arrayed wave guide grating (AWG) multiplexers and optical switches," J. Lightwave Tech., Vol. 15, 321-327, 1997.
doi:10.1109/50.554384 Google Scholar

8. Sneh, A. and K. M. Johnson, "High-speed tunable liquid crystal filter for WDM networks," J. Lightwave Tech., Vol. 14, 1067-1080, 1996.
doi:10.1109/50.511608 Google Scholar

9. Chen, P. L., K. C. Lin, W. C. Chuang, Y. C. Tzeng, K. Y. Lee, and W. Y. Lee, "Analysis of a liquid crystal Fabry-Perot etalon filter: A novel model," IEEE Photonics Tech. Lett., Vol. 9, 467-469, 1997.
doi:10.1109/68.559390 Google Scholar

10. Fujii, Y., "High-isolation polarization-independent optical circulator coupled with single-mode fibers," J. Lightwave Tech., Vol. 9, 456-460, 1991.
doi:10.1109/50.76659 Google Scholar

11. Smith, D. A., J. E. Baran, J. J. Johnson, and K. W. Cheung, "Integrated-optic acoustically tunable filters for WDM networks," IEEE J. Sel. Areas Commun., Vol. 8, 1151-1159, 1990.
doi:10.1109/49.57821 Google Scholar

12. Kim, C.-S., F. N. Farokhrooz, and J. U. Kang, "Electro-optic wavelength-tunable fiber ring laser based on cascaded composite Sagnac loop filters," Opt. Lett., Vol. 29, 1677-1679, 2004.
doi:10.1364/OL.29.001677 Google Scholar

13. Li, X., J. Chen, G. Wu, and A. Ye, "Digitally tunable optical filter based on DWDM thin film filters and semiconductor optical amplifiers," Opt. Express, Vol. 13, 1346-1350, 2005.
doi:10.1364/OPEX.13.001346 Google Scholar

14. Banerjee, A., "New approach to design digitally tunable optical filter system for wavelength selective switching based optical networks," Progress In Electromagnetic Research Letters, Vol. 9, 93-100, 2009.
doi:10.2528/PIERL09050303 Google Scholar

Dr. Anirudh Banerjee