Bistable polarization switching in transverse magnetic wave-injected semiconductor lasers by mode hopping
Bistable polarization switching in transverse magnetic wave-injected semiconductor lasers by mode hopping
复制标题
通过跳模实现横向磁波注入半导体激光器的双稳态偏振切换
DOI：
10.1002/ecjb.4420790801
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
T. Ichinose
中科院分区：
文献类型：
--
作者：
S. Ohno;M. Ichii;Masaru Mamiya;T. Ohta;T. Ichinose
双稳态光开关技术是光信息处理系统的关键技术，适用于光存储器。本文描述了一种能同时获得正、反转输出的半导体激光器的偏振开关。这种双稳性是通过利用具有双模式跳变特性的半导体激光器（主激光器）并将该激光器的TM偏振输出注入到恒定偏置到振荡阈值的另一个半导体激光器（从激光器）中来实现的。
提出并通过实验证实，将这两个激光器作为一个光学系统，可以在系统的注入电流和系统的输出偏振态之间实现双偏振开关。首先，作为该偏振切换的原理，说明注入光波长对半导体激光放大器的放大率的依赖性。然后，通过TM波注入和模式跳变的激光器的输出偏振的控制进行了说明，并在此基础上从实验和模拟的角度讨论了该光学系统的偏振特性。从理论和实验上指出了这种双偏振开关的优点，并根据主从激光器的特性，可以设定双偏振环的ON/OFF输出光强差和旋转方向。此外，还讨论了多线程连接的可能性。
Bistable optical switching, which is applicable to optical memory, is a key technology for the optical information-processing system. This paper describes the polarization switching of a semiconductor laser whose normal and inverted output could be obtained simultaneously. This bistability is realized by utilizing a semiconductor laser with bistable mode-hopping characteristics (master laser) and injecting the TM polarization output of this laser into another semiconductor laser (slave laser) constantly biased to the oscillation threshold.
It is proposed and confirmed by experiment that, by assuming these two lasers as one optical system, bistable polarization switching can be obtained between the injection current of the system and the output polarization of the system. First, as the principle of this polarization switching, the dependence of the injected light wavelength on amplification index of a semiconductor laser amplifier is explained. Then, the control of output polarization by TM wave injection and mode hopping of a laser is explained and the bistable characteristics of this optical system are discussed from experimental and simulation viewpoints based on these principles. The advantages of this bistable polarization switching are pointed out theoretically and experimentally, and the intensity difference of the ON/OFF output and the rotation direction of the bistable loop can be set according to the characteristics of the master and the slave laser. Moreover, the possibility of multislave connection is conjectured.