Versatile Integrated PMD Emulation and Compensation Elements Academic Article uri icon


  • Highly versatile building blocks for polarization-mode dispersion (PMD) emulation and compensation are demonstrated using tunable all-pass filters fabricated in 4%-index-contrast planar waveguides. While the all-pass filters can approximate any phase response, the complexity in setting the individual filter parameters is minimized by restricting the all-pass filter response to realize a range of differential delays, dispersion, and dispersion slope. A single section can approximate first-order or a higher-order PMD term or emulate chromatic or higher-order dispersion. A differential group delay (DGD) tuning range over 100 ps is demonstrated for 10 Gb/s and 25 ps for 40 Gb/s data. Second-order PMD with a tuning range of 255 ps2 and third-order PMD with a range of 2430 ps3 are also demonstrated. The larger index contrast required for the ring-resonator-based all-pass filters is advantageous in reducing the thermooptic response time to achieve polarization rotation speeds on the order of 0.1 s/degree. The device is interferometrically stable and compact in size. It can be fully integrated, scaled to many sections, and can implement a variety of PMD synthesis and statistical-emulation approaches.

published proceedings

  • Journal of Lightwave Technology

altmetric score

  • 6

author list (cited authors)

  • Madsen, C. K., Cappuzzo, M., Laskowski, E. J., Chen, E., Gomez, L., Griffin, A., ... Buhl, L.

citation count

  • 16

complete list of authors

  • Madsen, CK||Cappuzzo, M||Laskowski, EJ||Chen, E||Gomez, L||Griffin, A||Wong-Foy, A||Chandrasekhar, S||Stulz, L||Buhl, L

publication date

  • April 2004