Study on Mutual Injection Locking in Multi-Longitudinal-Mode Semiconductor Lasers and Its Applications

首先，要实现所有光学模式锁定对Fabry-Perot激光二极管（F-P LDs）的疲劳特征的不敏感性进行了实验调查，使用F-P LDs的空穴长度分别为300微米、370微米和900微米。具体地，面部反射的最佳条件已经被研究过。“C.受照射光线的极化方向的依赖性也是有调查的。”已研究了一种锁模脉冲列车的重复频率的第三种、划分和多种方法，并使用相位锁环路模型进行了研究，随后的结果也得到了证实。（1）减少光谱线宽度，两种方法都是承诺的。有了这些方法，所有光学模式锁定的收益率都增加了。一种使用SELFOC透镜作为外部洞穴的方法。一种在远终点的短纤维猪尾组合到LDs的后面反射的方法。（2）所有光学模式锁定的最佳面部治疗都是AR涂层--被清除（AR-CL）。（3）F-P LDs中产生的四波混合成分只有结核病成分独立于cw受照射的光的极化化。（4）模式锁定脉冲列车的重复频率的划分/多个部分可能基于F-P LDs中的相互注入锁定和注入锁定的纵向模式。

Firstly, methods to realize all optical mode-locking irrespective of lasing characteristics of Fabry-Perot laser diodes (F-P LDs) are experimentally investigated using F-P LDs whose cavity lengths are 300μm, 370μm, and 900μm. Secondly, optimal conditions for facet reflectivities are studied. The dependence on the polarization direction of the cw injected light is also investigated. Thirdly, division and multiplication of repetition frequencies of mode-locked pulse trains is studied using the phaselock loop model.The following results are obtained.(1)To reduce spectral linewidths, two methods are promising. With these methods, yield rate of all optical mode locking is increased.・ A method to utilize SELFOC lenses as external cavities.・ A method to utilize reflections at far ends of short fiber pig-tails coupled to rear facets of LDs.(2)The optimal facet treatment for all optical mode locking is AR coated-as cleaved (AR-CL).(3)The four-wave-mixing components generated in F-P LDs have only TB components independent of the polarization of the cw injected light.(4)Division/multiplication of repetition frequencies of mode-locked pulse trains is possible based on mutual injection locking and injection locking among longitudinal modes in F-P LDs.