Stabilization and Noise Reduction of DFB Laser by Incoherent Optical Feedback using FP-Resonator

使用 FP 谐振器通过非相干光反馈稳定 DFB 激光器并降低噪声

• 批准号: 02650238
• 负责人: IDA Yoshio
• 金额: $ 1.41万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650238/
• 关键词: Semiconductor laser; Optical feedback; Noise reduction; Frequency stabilization; Gain compression factor; 雑音係減; 利得圧縮低数; DFBレ-ザ; TM偏光; ファブリペロ共振器; インコヒ-レント

For the purpose of coherent optical communication system, semiconductor lasers should be frequency stabilized and its spectral linewidth should be narrowed. In our research plan, this is intended to achieve by loading a FP resonator having a high finess and by controlling its wavelength at a portion on the positve slope of the reflection curve of the FP resonator. This method has an advantage that amount of negative feedback is determined only by changing the refractive index of the active layer due to the carrier effect. So the system is free from the roll-off attributable to the parasitic capacitance and inductance.However, it has been found that the above scheme has the following drawbacks ; a) there exists a tradeoff between a high sensitivity of FP resonator and the corresponding bandwidth narrowing, b) there exists a considerable amount of light reflection from the input facit of FP resonator, and c) there exists a residual coherent light feedback due to the even order light reflections from FP resonator. In addition to these, it has been experimentally confirmed that employment of a FP resonator having a high finess does not exhibit a remarkable advantage as compared with other interferometer such as Michelson's.On the other hand, it has been reported that a number of studies are taking advantage of the effects of TM light injection in determining the dynamic parameters of semiconductor lasers, wavelength conversion scheme, picosecond pulse generation and polarization bistability. In relation to these circumstances, we turned our research issue to the fundamental properties of TM light injection. As results of that we have achieved a new method for experimental determination of gain compression factors in the presence of TM light infection, and analytical study of polarization bistability of DFB laser, which were accepted for publication in IEEE Photonics Technology Letters, and IEEE J. of Lightwave Technology, respectively.

在相干光通信系统中，半导体激光器需要稳频和窄谱线。在我们的研究计划中，这是通过加载具有高精细度的FP谐振器并将其波长控制在FP谐振器反射曲线的正斜率部分来实现的。该方法的优点在于，负反馈的量仅通过由于载流子效应而改变有源层的折射率来确定。因此，该系统不存在由寄生电容和寄生电感引起的滚降。a）在FP谐振器的高灵敏度和相应的带宽变窄之间存在折衷，B）存在来自FP谐振器的输入面的相当大量的光反射，以及c）由于来自FP谐振腔的偶数阶光反射，存在残余相干光反馈。除此之外，已经通过实验证实，与诸如迈克尔逊干涉仪的其它干涉仪相比，使用具有高精细度的FP谐振器并不表现出显著的优点。另一方面，已经报道了许多研究正在利用TM光注入的效果来确定半导体激光器的动态参数、波长转换方案、皮秒脉冲产生和偏振双稳态。在这些情况下，我们把我们的研究问题的基本性质的TM光注入。结果实现了一种在TM光影响下实验测定增益压缩因子的新方法，以及DFB激光器偏振双稳性的解析研究，并分别被IEEE Photonics Technology Letters和IEEE J. of Lightwave Technology接受发表。

项目成果

Tsuyoshi OGAWA, Yoshio IDA and Ken-ichi HAYASHI: "Analysis of polarization bistability of phase-shifted DFB laser due to TM light injection" IEEE Journal of Lightwave Technology.

Tsuyoshi OGAWA、Yoshio IDA 和 Ken-ichi HAYASHI：“TM 光注入引起的相移 DFB 激光器的偏振双稳态分析”IEEE 光波技术杂志。

Tsuyoshi OGAWA, Yoshio IDA and Ken-ichi HAYASHI: "Experimental determination of gain compression factors of a DFB laser in the presence of TM light injection" IEEE Photonics Technology Letters. (1992)

Tsuyoshi OGAWA、Yoshio IDA 和 Ken-ichi HAYASHI：“在 TM 光注入的情况下实验确定 DFB 激光器的增益压缩因子”IEEE 光子技术快报。