Design of a transversal equalizer for electronic dispersion compensation in optical communication links

作者：Gao Zhen Bin^*; Shi Yong; Wang Bo; Zeng Xiang Ye

来源：Optoelectronics Letters, 2011, 7(1): 0037-0040.

DOI：10.1007/s11801-011-0134-8

• Band pass filtering
• Band reject
• Bit rates
• Cut-off
• Delay units
• Dispersive channels
• Electronic dispersion compensation
• Filtering characteristic
• Forward voltage
• Low-pass filtering
• Nonlinear problems
• Notch filtering
• Optical communication links
• Optical fiber communication systems
• Power supply
• Series-parallel
• SiGe technology
• Tap gains
• Total power dissipation
• Transversal equalizers
• Variable gain amplifiers

A programmable transversal equalizer for electronic dispersion compensation (EDC) in optical fiber communication systems is developed. Based on the SiGe technology with a cut-off frequency of 80 GHz, the equalizer consists of 6 series parallel amplifiers as delay units and 7 Gilbert variable gain amplifiers as taps, which ensure that the equalizer can work at the bit rate of 10 Gb/s. With different tap gains, the forward voltage gain of the transversal equalizer varies, which demonstrates that the equalizer has various filtering characteristics such as low pass filtering, band pass filtering, band reject filtering, and notch filtering, so it can effectively simulate the inverse transfer function of dispersive channels in optical communications, and can be used for compensating the inter-symbol interference and other nonlinear problems caused by dispersion. The equalizer (including pads) occupies an area of 0.40 mm×1.08 mm, and its total power dissipation is 400 mW with 3.3 V power supply.

• 出版日期2011
• 单位河北工业大学