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.

为了实现相干光通信系统，需要对半导体激光器进行稳频并窄化其谱线宽度。在我们的研究计划中，这旨在通过加载具有高精细度的FP谐振器并通过将其波长控制在FP谐振器的反射曲线的正斜率的部分来实现。该方法的优点是仅通过由于载流子效应而改变有源层的折射率来确定负反馈量。因此，该系统不会出现由于寄生电容和电感而导致的滚降。但是，已经发现上述方案具有以下缺点； a) FP 谐振器的高灵敏度和相应的带宽变窄之间存在权衡，b) 存在来自 FP 谐振器输入端的大量光反射，以及 c) 由于来自 FP 谐振器的偶数阶光反射，存在残余相干光反馈。除此之外，实验证实，与其他干涉仪（例如迈克尔逊干涉仪）相比，使用具有高精细度的FP谐振器并没有表现出显着的优势。 另一方面，据报道，许多研究正在利用TM光注入的效应来确定半导体激光器的动态参数、波长转换方案、皮秒脉冲生成和偏振双稳定性。针对这些情况，我们将研究问题转向TM光注入的基本特性。结果，我们实现了一种在 TM 光感染存在下实验确定增益压缩因子的新方法，以及 DFB 激光器偏振双稳性的分析研究，这些方法分别被 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。