Local probing of higher-order dispersion in photonic crystal waveguides

R. J.P. Engelen*, Y. Sugimoto, Y. Watanabe, J. P. Korterik, N. Ikeda, N. F. Van Hulst, K. Asakawa, L. Kuipers

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

One of the exciting features of photonic crystals is that light may travel at very low group velocities at specific optical frequencies. In photonic crystal waveguides, such low group velocities are also possible. We have studied the propagation of femtosecond pulses in these waveguides, with a phase-sensitive and time-resolved near-field microscope. With this microscope, we visualized the pulses as they propagate in the waveguide. Moreover, we monitored the pulse envelope in time, at various positions in the structure, in order to study the pulse dispersion. We found, that the pulses indeed propagate more slowly as we approached the Brillouin zone boundary by decreasing the optical frequency. As the group velocity is reduced, a broadening of the pulses was observed. On top of that, the pulses exhibited a strong asymmetric distortion as the propagation distance increased. This asymmetric broadening can be attributed to an increase in higher-order dispersion. Our findings show, that if the most commonly used slow light regime in photonic crystals is to be exploited, great care has to be taken about higher-order dispersion, even at moderate group delays.

Original languageEnglish
Title of host publication2006 International Conference on Transparent Optical Networks, ICTON 2006
Pages98-101
Number of pages4
DOIs
Publication statusPublished - 1 Dec 2006
Event8th International Conference on Transparent Optical Networks, ICTON 2006 - Nottingham, United Kingdom
Duration: 18 Jun 200622 Jun 2006
Conference number: 8

Publication series

Name2006 International Conference on Transparent Optical Networks
Volume2

Conference

Conference8th International Conference on Transparent Optical Networks, ICTON 2006
Abbreviated titleICTON
CountryUnited Kingdom
CityNottingham
Period18/06/0622/06/06

Keywords

  • Dispersion
  • Near-field microscopy
  • Photonic crystal
  • Slow light
  • Ultrafast pulses
  • Waveguides

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    Engelen, R. J. P., Sugimoto, Y., Watanabe, Y., Korterik, J. P., Ikeda, N., Van Hulst, N. F., ... Kuipers, L. (2006). Local probing of higher-order dispersion in photonic crystal waveguides. In 2006 International Conference on Transparent Optical Networks, ICTON 2006 (pp. 98-101). [4013743] (2006 International Conference on Transparent Optical Networks; Vol. 2). https://doi.org/10.1109/ICTON.2006.248347