Frequency Stabilization of a Semiconductor Laser in an Optical FSK Communication System

光 FSK 通信系统中半导体激光器的频率稳定

• 批准号: 09450151
• 负责人: SATO Takashi
• 金额: $ 6.66万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450151/
• 关键词: Semiconductor Laser; Frequency Stabilization; Optical FSK Communication; Magneto-Optical Effect; Stabilization in Transmitter and Receiver; 半導体レーザ

The current optical communication systems are using the intensity modulation method, but it will be difficult for this method to handle the high speed and large capacity communication needs in the near future. We intended to develop the optical frequency modulation method for the next generation systems. This needs the frequency stabilization of a semiconductor laser. So, we stabilized the oscillation frequency of a semiconductor laser under the direct frequency shift keying (FSK) using the Rb-D2 absorption lines at 780 nm wavelength. The high frequency stability was obtained in the PEAK method, which is the system using the simple envelope detection circuit, under the direct FSK. We, then, investigated the stabilization method applicable to 1.5 μm wavelength for the optical communication systems. We intended to use the inner second harmonic generation (SHG) of the semiconductor laser to get the control signal for the frequency stabilization, because this SHG wavelength is around 780 nm. We also tested how to use two frequency references, I.e., the Rb-D2 absorption line and an etalon, for Stabilizing the 1.5 μm wavelength semiconductor laser, because they have different and supplementary characteristics as a frequency reference. We finally investigated the estimation method of the frequency stability using the beat note between two laser frequency.

目前的光通信系统都采用强度调制方法，但这种方法在不久的将来将难以满足高速、大容量的通信需求。我们打算为下一代系统开发光调频方法。这需要半导体激光器的频率稳定。因此，我们利用Rb-D2吸收谱线在780 nm波长稳定了半导体激光器在直接频移键控（FSK）下的振荡频率。在直接FSK下，采用简单包络检测电路的PEAK方法获得了较高的频率稳定性。然后，我们研究了适用于1.5 μm波长光通信系统的稳定方法。我们打算利用半导体激光器的内二次谐波产生（SHG）来获得稳频的控制信号，因为这个SHG波长在780 nm左右。我们还测试了如何使用两个频率参考，即Rb-D2吸收线和标准子，以稳定1.5 μm波长的半导体激光器，因为它们具有不同的特性和互补的频率参考。最后研究了利用两个激光频率之间的拍音估计频率稳定性的方法。

项目成果

中村弘樹、佐藤 孝、他: "直接FSK変調時における半導体レーザの発振周波数安定化法の検討"平成9年度電子情報通信学会信越支部大会. 論文番号S2. 409-410 (1997)

Hiroki Nakamura、Takashi Sato 等人：“直接 FSK 调制期间半导体激光器振荡频率稳定方法的研究”1997 年 IEICE Shin-Etsu 分会会议论文编号 S2。

細谷邦之、佐藤 孝、他: "エタロンとRb原子の吸収線を用いた半導体レーザーの周波数安定化における基準信号の評価"平成9年度日本物理学会新潟支部第26回例会. 論文番号PS8. (1997)

Kuniyuki Hosoya，Takashi Sato，等：“使用标准具和Rb原子吸收线的半导体激光器频率稳定性的参考信号的评估”日本物理学会新泻分会1997年第26次例会。论文编号PS8。 1997）

酒井雅文、佐藤 孝、他: "光フィードバック時における集光レンズと半導体レーザーの二次高調波との関係"平成11年度日本物理学会新潟支部第28回例会. 論文番号22. (1999)

Masafumi Sakai、Takashi Sato等：“光反馈时聚光透镜与半导体激光器二次谐波的关系”日本物理学会新泻分会1999年第28次例会。论文编号22。（1999年） ）

Toru Uesugi, Takashi Sato, etc.: "'Observation of the Inner SHG of a Semiconductor Laser under the Optical Feedback'"Niigata Conference of Physical Society of Japan. Paper No. PS9.. (1998)

上杉彻、佐藤隆等：“‘光反馈下半导体激光器内部SHG的观察’”日本物理学会新泻会议。

Masafumi Sasaki, Takashi Sato, etc.: "Relation between SHG of a Semiconductor Laser and lenses under the Optical Feedback"Niigata Conference of Physical Society of Japan. Paper No. 22. (1999)

Masafumi Sasaki、Takashi Sato等：“光学反馈下半导体激光器的SHG与透镜之间的关系”日本物理学会新泻会议。