Gain equalization of EDFA using a loop filter with a single polarization controller

• 作 者: 周柯江 潘舒明 Nam Quoc Ngo 张旭琳
• 机 构: Department of Electronic Engineering,Zhejiang University,School of Electrical and Electronic Enginee
• 出 处: Chinese Optics Letters
• 发表日期: 2012年07期
• 关键词: equalization EDFA deviation explanation tuning letter Wavelength bandwidth there

A Sagnac loop filter with two pieces of high birefringence fiber having equal lengths,and spliced together at a fixed angle of 30°displacement between the two principle axes,is proposed in this letter.Gain equalization of erbium-doped fiber amplifiers(EDFAs) is implemented by tuning only the polarization controller in the loop filter.Experimental result shows that there remains a deviation of±1 dB in the region of the flattened profile with the useful bandwidth of about 23 nm,thereby demonstrating the effectiveness of the method.An effective mathematical model and mechanism is also given for further explanation.

A Sagnac loop filter with two pieces of high birefringence fiber having equal lengths, and spliced ​​together at a fixed angle of 30 ° displacement between the two principle axes, is proposed in this letter. Gold equalization of erbium-doped fiber amplifiers (EDFAs) is implemented by tuning only the polarization controller in the loop filter. Experimental result shows that there is a deviation of ± 1 dB in the region of the flattened profile with the useful bandwidth of about 23 nm, thereby demonstrating the effectiveness of the method. mathematical model and mechanism is also given for further explanation.