Fiber optic highly over-coupled coupler sensors
- Department of Electrical and Computer Engineering, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts, 02747 (United States)
- Laboratory for Lightwave Technology, Division of Engineering, Brown University, Providence, Rhode Island 02912 (United States)
We report on the development of prototype vibration and acoustic motion sensors using highly over-coupled couplers (HOCC). A HOCC fabricated with equal power in both arms after 550 optical power transfer cycles and when illuminated with a light source of 15 {mu}W at a wavelength of 850 nm, this device has a sensitivity of 0.9 {mu}W/{mu}m. A prototype of an optical fiber vibration sensor was made by clamping the 550 cycled HOCC to a cantilever stage to which a vibration source was attached. The maximum linear range of this particular prototype is 12 {mu}m. We have also demonstrated a HOCC having 2150 cycles at 850 nm which has a sensitivity of 4 {mu}W/{mu}m. A HOCC sensor has the possible advantages of high resolution, low cost, and all fiber structure. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 288391
- Report Number(s):
- CONF-9509298-; ISSN 0094-243X; TRN: 9615M0135
- Journal Information:
- AIP Conference Proceedings, Vol. 368, Issue 1; Conference: Acoustic velocity sensor focused workshop, Mystic, CT (United States), 12-13 Sep 1995; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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