Strain measurement module with tunable light generator and...

Details Strain measurement module with tunable light generator and... Strain measurement module with tunable light generator and...

2005-11-01

2005-11-01

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

06961120

ABSTRACT:
A strain measurement system includes a tunable light generator, a coupler, a fiberoptic sensor unit, and an optical detector. The tunable light generator includes a Super Luminescent light emission Diode (SLD), and a tunable Fabry-Perrot (FP) filter cascaded to an output terminal of the SLD to convert light having a wideband spectrum into discrete optical signals. The coupler receives and distributes the optical signals and passes them to a wavelength compensation device which detects wavelengths of the optical signals. The fiberoptic sensor unit receives the optical signals from the tunable light generator through the coupler and transmits a response signal corresponding to a variation of strain attributable to load. The optical detector detects the response signal output from the fiberoptic sensor through the coupler.

REFERENCES:
patent: 6437326 (2002-08-01), Yamate et al.
patent: 6674928 (2004-01-01), Johnson et al.
patent: 6768577 (2004-07-01), Eggleton et al.
patent: 6788418 (2004-09-01), Kringlebotn

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