Adjustable EDFA gain equalization filter for DWDM channels based on a single LPG excited by flexural acoustic waves

作者：Marques Carlos A F^*; Oliveira Roberson A; Pohl Alexandre A P; Nogueira Rogerio N

来源：Optics Communications, 2012, 285(18): 3770-3774.

DOI：10.1016/j.optcom.2012.05.045

• Acousto-optic effect
• Long period fiber grating
• EDFA gain equalization
• DWDM systems

A fast adjustable gain equalization filter for dense wavelength division multiplexing (DWDM) system is reported. The method is based on a single long period fiber grating (LPG) which is excited by means of flexural acoustic waves. The equalization of a typical erbium doped fiber. amplifier (EDFA) gain spectrum with a gain flatness of <0.3 dB over a 32 nm bandwidth is demonstrated. The filter adjustment is obtained by choosing different acoustic loads applied to the acousto-optic modulator, which presents a switching time of similar to 17 mu s. A maximum power penalty of 0.84 dB, relatively to the back-to-back signal, was achieved.

• 出版日期2012-8-15
• 单位中国林业科学研究院