Realization of periodic transmission filter based on a pair of cascaded long-period fibre gratings of different strength/wavelength position |
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Authors: | Kieran Mc Evoy David N Nikogosyan |
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Institution: | Physics Department, University College Cork, Cork, Ireland |
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Abstract: | Using high-intensity (560–650 GW/cm2) 264 nm 220 femtosecond laser pulses, we inscribed a periodic (comb) transmission filter in a photosensitive Ge/B-codoped fibre, based on a pair of long-period gratings of different strength/wavelength position. The irradiation conditions and grating parameters for the successful realization of the 24–28-nm-wide transmission filter in the region 1480–1580 nm with the fringe period of 1.7–3.1 nm and the fringe bandwidth of 0.8–1.3 nm were established. |
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