Broadband hitless bypass switch for integrated photonic circuits

  title={Broadband hitless bypass switch for integrated photonic circuits},
  author={H. H. Haus and M. A. Popovic and M. R. Watts},
  journal={IEEE Photonics Technology Letters},
A new microphotonic hitless switch is proposed. By enabling continuous, uninterrupted transition to a bypass path, it permits tuning of wavelength add-drop filters without disturbing intermediate channels. The scheme comprises two symmetrically actuated, 2 times 2 Deltabeta-type optical switches, antisymmetrically cascaded in a balanced Mach-Zehnder configuration, and a pi differential phase shift in the interferometer arms. By symmetry, it provides for wavelength-independent hitless operation… CONTINUE READING


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