Fibre Bragg grating sensor interrogation system using a CCD side detection method with superimposed blazed gratings
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We present, for the first time to our knowledge, experimental evidence showing that superimposed blazed fiber Bragg gratings may be fabricated and used to extend the dynamic range of a grating-based spectrometer. Blazed gratings of 4/spl deg/ and 8/spl deg/ were superimposed in germanosilicate fiber by ultraviolet inscription and used in conjunction with a coated charged-coupled device array to interrogate a wavelength-division-multiplexing sensor array. We show that the system can be used to monitor strain and temperature sensors simultaneously with an employable bandwidth which is extendable to 70 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 1549-1551 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 16 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 24 May 2004 |