| 摘要 |
<p>There is provided a sensor system for measuring a change in an environmental condition, the sensor system comprising: an optical source unit for sending an optical interrogation signal in an optical waveguide, the optical interrogation signal having a peak wavelength within a wavelength range; an optical sensor device in the waveguide, the optical sensor device comprising an optical grating having an optical response spectrum comprising a substantially linear slope within the wavelength range, the optical sensor device for outputting an optical output signal substantially at the peak wavelength in response to the optical interrogation signal, the optical output signal having an output intensity according to the slope; and an optical detecting device for measuring a variation in the output intensity over time, the variation being indicative of the change.</p> |
