Patent ID: 6961120

Claim:
A strain measurement system, comprising: a tunable light generator comprising 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, which is generated in the SLD, into discrete optical signals having central wavelengths at regular intervals; a coupler for receiving and distributing the optical signals output from the tunable light generator; wavelength compensation means for receiving the optical signals from the tunable light generator through the coupler and detecting wavelengths of an optical signal output from the tunable light generator; a fiberoptic sensor unit for receiving the optical signals from the tunable light generator through the coupler and transmitting a response signal corresponding to a variation of strain attributable to load; and an optical detector for detecting the response signal output from the fiberoptic sensor unit through the coupler.