| 摘要 |
<p>A monitoring system for monitoring a plurality of fibre Bragg gratings in an optical fibre, each fibre Bragg grating being sensitive to a different wavelength of light. The system comprises a broadband source for illuminating the optical fibre; at least one optical interferometer; light feeding means for feeding to an input of the interferometer light reflected from the fibre Bragg gratings, and a processor for processing the output from the interferometer to determine the wavelength of the reflected light. The light feeding means comprise a wavelength division multiplexer operable to separate light received from the optical fibre into a plurality of wavelengths, each associated with one of the fibre Bragg gratings and/or a time division mulitplexer operable to separate light received from the optical fibre into in a time separated series.</p> |
