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Monolithic suspended optical waveguides for InP MEMS

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7 Author(s)
D. P. Kelly ; Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USA ; M. W. Pruessner ; K. Amarnath ; M. Datta
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We present a novel waveguide design for InP microelecromechanical systems. The substrate is removed from underneath the waveguide by sacrificial etching, and the suspended waveguide is supported by lateral tethers. This allows segments of the waveguide to be moved and prevents substrate leakage loss in the fixed segments of the waveguides. A single-mask fabrication process is developed that can be extended to more complex devices employing electrostatic actuation. Fabricated suspended waveguides exhibit a loss of 2.2 dB/cm and tether pairs exhibit 0.25-dB additional loss.

Published in:

IEEE Photonics Technology Letters  (Volume:16 ,  Issue: 5 )