Abstract
An all-fibre dynamic gain equalizer based on a novel long-period fibregrating (LPFG) written on a photosensitive fibre by high-frequencyCO2 laser pulses is demonstrated for the dynamic gain flattening ofEr-doped fibre amplifiers. The resonant peak amplitude of such adynamic gain equalizer can be adjusted linearly by bending the LPFG.The gain profile of the Er-doped fibre amplifier constructed has beenflattened to within ±0.7 dB over a 32 nm bandwidth using such adevice.
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