| 摘要 |
According to one embodiment, a physical quantity measuring system includes an optical source (12) configured to emit a measurement light to a plurality of fiber Bragg grating (FBG) lines containing FBGs connected in cascade by an optical fiber, the measurement light including a reflected wavelength of at least one of the FBGs included in the FBG lines, an optical switch (13) including a common port for receiving the measurement light from the optical source (12), and a plurality of input/output ports connected to the plurality of FBG lines, the optical switch being configured to output the measurement light, from the common port to each of the plurality of input/output ports at different time points, a wavelength separator (15) configured to receive light reflected from the respective FBGs of the FBG lines and to separate the reflected light into a plurality of component lights having predetermined wavelengths, after the measurement light is output from one of the input/output ports of the optical switch (13), and optical receivers (16) configured to receive the component lights from the wavelength separator (15) and detect light intensities of the component lights. |
