Study on the Effect of Reflected Lights on Mode Partition Characteristics of Dynamic Single-Mode Laser Diodes

反射光对动态单模激光二极管模式分配特性影响的研究

• 批准号: 03650275
• 负责人: MORI Masakazu
• 金额: $ 1.15万
• 依托单位: Nagoya 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: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650275/
• 关键词: Reflection-Induced Noise; Incoherent Light Injection; Coherent Light Injection; Dynamic Single- Mode LD's; Mode Partition Noise; Intensity Noise; インコヒ-レント光注入; 動的単一モ-ド半導体レ-ザ; モ-ド分配雑音

In this research, the mode partition characteristics of distributed feedback laser diodes (DFB LD's)are experimentally evaluated, and the noise generation mechanisms are investigated by a computer simulation. The following results are obtained.1.By observing the transient spectra of DFB LD's with the time resolving spectroscopic method, it is made clear that DFB LD's oscillate in single longitudinal mode even if they are directly modulated at Gb/s.2.The mode partition noise induced by incoherent reflections is found to increase with the DC bias current. The origin of this noise increase is attributed to the modulation of the threshold of the main mode due to the interference between the reflected light and the light inside of the LD.3.An experimental setup to control the amplitude and the phase of the coherently reflected light is established. In the spectra of directly modulated DFB LD's, it is found that the short wavelength components are enhanced by the coherent reflections. The measurements and the computer simulations are in progress.

在本研究中，通过实验评估了分布式反馈激光二极管（DFB LD）的模式分配特性，并通过计算机模拟研究了噪声产生机制。得到以下结果：1.通过时间分辨光谱法观察DFB LD的瞬态光谱，可以清楚地看出，即使直接以Gb/s调制，DFB LD仍以单纵模振荡。2.发现非相干反射引起的模式分配噪声随着直流偏置电流的增加而增大。这种噪声增加的根源是由于反射光与LD内部光之间的干涉而导致主模阈值的调制。3.建立了控制相干反射光的幅度和相位的实验装置。在直接调制的DFB LD 的光谱中，我们发现短波长成分因相干反射而增强。测量和计算机模拟正在进行中。

项目成果

T.Kawai: "Characteristics of Mode Partition Noise of DFB LD's Induced by Externally Reflected Light" IEICE Trans.Commun.E75-B. 906-913 (1992)

T.Kawai：“外部反射光引起的 DFB LD 的模式划分噪声特性”IEICE Trans.Commun.E75-B。

T.Kawai: "Analysis of Transient Spectral Spread of Directly Modulated DFB LD's" IEICE Trans.Commun.E76-B. (1993)

T.Kawai：“直接调制 DFB LD 的瞬态频谱扩展分析”IEICE Trans.Commun.E76-B。

T.Kawai: "Measurement of Mode Partition Noise of DFB LD's Induced by Externally Reflected Light" IEICE Trans.Commun.

T.Kawai：“外部反射光引起的 DFB LD 的模式分配噪声的测量”IEICE Trans.Commun。

T.Kawai, A.Kurihara, M.Mori, T.Goto, A.Miyauchi, and T.Nakagami: "Analysis of Transient Spectral Spread of Directly Modulated DFB LD's" IEICE Trans.Commun.E76-B. (1993)

T.Kawai、A.Kurihara、M.Mori、T.Goto、A.Miyauchi 和 T.Nakagami：“直接调制 DFB LD 的瞬态频谱扩展分析”IEICE Trans.Commun.E76-B。

A.Takeda: "Effect of Reflected Light on Mode Partition Characteristics of FabryーPerot Laser Diodes" IEICE Trans.Commun.E75ーB. (1992)

A.Takeda：“反射光对法布里-珀罗激光二极管模式分配特性的影响”IEICE Trans.Commun.E75-B (1992)。