【作者】 张静； 徐峰； 曹志刚； 叶勇； 俞本立；

【Author】 ZHANG Jing, XU Feng, CAO Zhi-gang, YE Yong, YU Ben-li (Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, Anhui University, Hefei, 230039, China)

【机构】 安徽大学光电信息获取与控制教育部重点实验室；

【摘要】 详细论证了调制器调制特性与直流偏置电压和调制深度的关系,精确给出了调制器线性调制范围。通过调节偏置电压和调制深度,来控制调制器透射曲线。在5GHz射频调制频率下,采用时域分析法对锁模脉冲序列和调制曲线进行数值研究。数值分析结果表明:线性调制区与非线性调制区均可获得振幅均衡的锁模脉冲;当锁模阶数p>4时,调制深度变化对脉冲振幅均衡程度影响剧烈。所用物理图像简洁明晰,结果对获得功率均衡的谐波锁模脉冲的实验研究有参考意义。更多还原

【Abstract】 The relationship between modulating characteristic and its direct-current bias voltage and modulation depth was demonstrated in detail. The linear modulation region was given precisely. By adjusting the direct-current bias voltage and modulation depth, the shape of transmission curve can be controlled. Mode locking pulse train and the modulator transmission curve were numerically investigated based on time-domain analysis. The RF modulation frequency was at 5GHz.The numerical result shows that: amplitude equalized pulses were obtained both in the linear region and the nonlinear region. When the rational harmonic mode-locking order p is larger than four, the value of modulation depth affect the pulse-amplitude equalization severely. The physical figure in the paper is laconic and is helpful to get amplitude equalized mode-locked pulses in experiment.更多还原