| Summary: | 碩士 === 國立中央大學 === 電機工程研究所 === 99 === The purpose of this research is to develop a passive equalizer that can be used in the high-speed optical interconnection system. This equalizer effectively increases the signal to noise ratio (SNR) of the signal transmission and also improves the signal integrity of the high-speed optical interconnection system by using capacitors, inductors, resistors to compensate for the overall system frequency response flatness.
Based on the S parameters of the high-speed optical interconnection system and the band width of the small-signal in the ideal signal integrity, the frequency response of the target passive equalizer can be calculated. Experiments use the Vertical cavity surface-emitting laser (VCSEL) chips (ULM-850-5Gbps) from ULM in the output of high-speed optical interconnection system, the standard bias current is 5 mA and the transmission speed can reach 5 Gbps.
After improving the passive equalizer, the transmission speed can increase from 5 Gbps to 10 Gbps and also pass the eye mask of OC-192 and 10 GbE. If the transmission speed is kept at 5 Gbps, the bias current of ULM-850 can be decreased from 2.9 mA down to 2.35 mA under the 10-12 bit error rate (BER).
This passive equalizer is an intelligible design which is easy to understand; its circuit is simple and can easily be integrated with the high-speed optical interconnection system. All these features make it very flexible and applicable to other design. It is believed to save DC power consumption and lower costs in practical applications.
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