An optomechanical pressure sensor using multimode interference couplers with polymer waveguides on a thin p(+)-Si membrane

We report a new optomechanical pressure sensor using multimode interference (MM) couplers with polymer waveguides and a thin p(+)-Si membrane. We have simulated device characteristics by the normal mode theory and the mode propagation method applied to deflection and strain of the membrane. The optical waveguide is made of a single-mode, rib type of NOA73/PMMA/SiO2 multi-layer system The devices have been fabricated on the thin p(+)-Si membranes which are selectively etched using bulb: micromachining. Device size is 0.4 mm (width) x 13 mm (length) and the total thickness of the membrane is 7 mu m. The device characteristics are measured using a He-Ne laser (lambda = 632.8 nm) as a light source. High sensitivity of 8.2 ppm/Pa has been obtained in the range of 100 kPa. (C) 2000 Elsevier Science S.A. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2000-02
Language
ENG
Keywords

SILICON

Citation

SENSORS AND ACTUATORS A-PHYSICAL, v.79, no.3, pp.204 - 210

ISSN
0924-4247
URI
http://hdl.handle.net/10203/2936
Appears in Collection
EE-Journal Papers(저널논문)
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