Performance Analysis of Balanced Phase-Locked Loops in Long- Haul Optical Fiber Communication Systems : Design Considerations

• Main Authors: Chou Chin-Chung, 周晉崇
• Other Authors: Wang Likarn
• Format: Others
• Language: en_US
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/13860008342830761879

碩士 === 國立清華大學 === 電機工程研究所 === 81 === We analyze the performance of a balanced PSK homodyne receiver accounting for the impacts of laser phase noise,data-to- phaselock crosstalk, shot noise and the noise induced by cascaded optical amplifiers. Of most interest in this thesis is the effect of accumulated optical amplifier noise on the performance of a phase-locked-loop. Due to such effect, the loop natural frequency should be properly chosen in order to reach an optimum system performance. It is found that the optimum loop natural frequency may decrease substantially due to the effect of accumulated optical amplifier noise. Furthermore, the phase deviation between the transmitted symbols for the mark and the space states is found to play a significant role in determining the receiver performance. The optimum phase deviation, which leads to a minimum bit-error rate for a constant received signal power, shifts to a larger value as the number of optical amplifiers increases.