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Relationship between sensitivity and waveguide position on the diaphragm in integrated optic pressure sensors based
Masashi Ohkawa1, Kazuhiko Hasebe, Seishi Sekine
1Faculty of Engineering, Niigata University, Japan. ohkawa@eng.niigata-u.ac.jp
Applied Optics
|September 6, 2002
Summary
This study experimentally examined how waveguide position affects integrated optic pressure sensor sensitivity. Results show the diaphragm edge offers optimal sensitivity for elasto-optic sensors.
Area of Science:
- Photonics
- Optical Sensing
- Materials Science
Background:
- Integrated optic pressure sensors rely on diaphragms for pressure transduction.
- Theoretical models indicate optimal waveguide placement at the diaphragm edge for elasto-optic sensors.
- Experimental validation of this waveguide position-sensitivity relationship is lacking.
Purpose of the Study:
- To experimentally investigate the relationship between sensing waveguide position and sensitivity in integrated optic pressure sensors.
- To provide empirical data for designing elasto-optic sensors and assessing misalignment tolerance.
Main Methods:
- Utilized a glass-based integrated optic sensor.
- Employed intermodal interference as the sensing mechanism.
- Systematically varied the sensing waveguide position on the diaphragm.
Main Results:
- Sensitivity is strongly dependent on the sensing waveguide's position on the diaphragm.
- Experimental data confirms theoretical predictions regarding optimal waveguide placement.
- Quantified the sensitivity variation across different waveguide positions.
Conclusions:
- Experimental findings support the theoretical optimum for waveguide placement at the diaphragm edge.
- Understanding this relationship is crucial for the practical design and fabrication of integrated optic pressure sensors.
- This research provides essential data for tolerance analysis in sensor misalignment.