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Tuning of long-period fibre gratings written by CO2 laser with resonant transmission below -45 dB

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2 Author(s)
Slavik, R. ; Inst. of Radio Eng. & Electron., Acad. of Sci. of the Czech Republic, Prague ; Todorov, F.

Long-period fibre gratings (LPGs) that were made to have resonant transmission below -45 dB are tuned via their simultaneous bending and straining. It was found that the position of the LPG resonance can be tuned over more than 6 nm, maintaining the level of the resonant transmission below -45 dB. Fine tuning of the resonance transmission without a change in its spectral position is also demonstrated. The reported LPGs should satisfy the strictest requirements on the control of LPG filtering characteristics, especially in terms of the phase response

Published in:

Electronics Letters  (Volume:43 ,  Issue: 1 )