【作者】 张明江；

【导师】 王云才；

【作者基本信息】 太原理工大学 ， 物理电子学， 2005， 硕士

【摘要】 波长范围在1550nm左右的可调谐多波长短光脉冲源在波分复用(WDM)、光时分复用(OTDM)以及混合WDM/OTDM光通信系统中有着越来越广泛和重要的应用。本文围绕低抖动可调谐多(双)波长增益开关光脉冲的产生研究,主要进行了以下工作: (1)理论分析了注入锁定现象;采用含有Langevin噪声项的速率方程,数值模拟了外光注入增益开关半导体激光器降低光脉冲时间抖动的情况。 (2)提出将注入锁定技术和降低光脉冲时间抖动方法相结合的实验方案。实验产生了低抖动可调谐单波长光脉冲,研究了注入光功率及波长失谐对输出光脉冲的边模抑制比和时间抖动的影响。 (3)利用两个DFB半导体激光器作为外部种子源注入增益开更多还原

【Abstract】 Tunable multi-wavelength short optical pulse sources around 1550nm are important for applications such as wavelength division multiplexed (WDM), optical time division multiplexed (OTDM), and hybrid WDM/OTDM optical communication systems. In this paper, the theory analysis and experimental study on the generation of the low jitter optical pulses with gain-switched laser diodes is presented, those pulses also have the advantages ofwavelength-tunable or dual/multi-wavelength. The main works are summarized as follows:(1) The injection locking phenomenon has been analyzed in theory; the numerical simulation of optical pulses timing jitter reduction by external seeding injection has been done based on the rate equations with an added Langevin noise.(2) A method for combining injection locking technique with reduction timing jitter means is developed. Using this method, low jitter tunable single wavelength optical pulses has been generated. The dependency of timing jitter and SMSR on injected power and wavelength detuning is studied.(3) A scheme that using two DFB laser diodes as external seeding sources to inject into the gain-switched FP laser diode is proposed and demonstrated. For the first time, low jitter tunable dual-wavelength gain-switched optical pulses are generated in experiment.(4) A method that using a FP laser diode as external seeding toinject into a gain-switched FP laser diode is developed to reduce the pulses timing jitter. Low jitter and multi-wavelength gain-switched optical pulses are generated in experiment. (5) Compared the timing jitter reduction under different injection conditions, a conclusion that under the same injected power, the more amounts the injected wavelengths are, the lower the optical pulses timing jitter is has been proposed.更多还原