Study on Broadband Optical Modulator with Superconducting Transmission Line

超导传输线宽带光调制器的研究

• 批准号: 09650017
• 负责人: YOSHIDA Keiji
• 金额: $ 2.18万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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-09650017/
• 关键词: superconductor; optical modulator; microwave-optical device; LiNbO_3

We have studied a long voltage optical modulator employing high Tc superconducting resonant-type electrodes for use in the sub-carrier optical transmission system in which microwave signals are carried by intensity modulated light-wave. It is shown that microwave modulation of light-wave can be made efficient by using superconducting electrodes with high Q-factor. A preliminary experiment using LiNbOィイD23ィエD2 (LN) optical modulator with YBaィイD22ィエD2CuィイD23ィエD2OィイD2xィエD2 (YBCO) electrode demonstrates dc and microwave modulation of the optical wave.1. The design of resonant type optical modulators with impedance circuits in presented, and YBCO thin films on MgO substrate were employed as the electrodes. It is shown by numerical calculation that the modulation efficiency increases when high Q superconductors are used as the electrodes.2. We present a preliminary experiment on the optical modulator, which was realized by flip-chip bonding of LN and MgO substrates. Based on the design and calculation, modulation experiments were carried out at low temperatures. It was demonstrated that the optical modulator with high Tc superconducting electrode by the flip-chip bonding method operated effectively.

本文研究了一种采用高Tc超导谐振型电极的长电压光调制器，用于微波信号由强度调制光波传输的子载波光传输系统。结果表明，采用高q因子的超导电极可以实现光波的微波调制。初步实验使用LiNbOィイc15ィエD2 (LN)光调制器YBaィイD22摊位ィエD2Cuィイc15ィエD2OィイD2xィエD2(氧)电极演示了直流和微波调制的光学wave.1。提出了一种带阻抗电路的谐振型光调制器的设计方案，采用MgO衬底上的YBCO薄膜作为电极。数值计算表明，采用高Q超导体作为电极可以提高调制效率。我们提出了一个初步的光学调制器实验，该调制器是通过LN和MgO衬底的倒装键合实现的。在设计计算的基础上，进行了低温调制实验。结果表明，采用倒装键合方法制备的高Tc超导电极光调制器工作有效。

项目成果

K, Yoshida, et al.: "Design and Performance of a Velocity-Matched Broadband Optical Modulator With Superconducting Electrodes"IEEE Trans. Appl. Supercond.. 9. 3421-3424 (1999)

K、Yoshida 等人：“具有超导电极的速度匹配宽带光调制器的设计和性能”IEEE Trans。

K. Yoshida, et al.: "Modeling of High-Tc Superconducting Transmission Line with Anisotropic Complex Conductivity"TEICE Trans. Electron.. E83-C. 7-14 (2000)

K. Yoshida 等人：“具有各向异性复电导率的高温超导传输线建模”TEICE Trans。

Keiji Yoshida, et al.: "Design and Performance of Miniaturized Superconducting Coplanar Waveguide Filters"IEEE Trans. Appl. Supercond.. vol. 9. 3905-3908 (1999)

Keiji Yoshida 等人：“小型化超导共面波导滤波器的设计和性能”IEEE Trans。

Keiji Yoshida, et al.: "Modeling of High-Tc Superconducting Transmission Lien with Anisotropic Complex Conductivity"IEICE Trans. Eelctron.. vol. E83-C, No. 1. 7-14 (2000)

Keiji Yoshida 等人：“具有各向异性复电导率的高温超导传输连线建模”IEICE Trans。

Haruichi Kanaya et al.: "Design and Preparation of Single-Chip HTS Coplanar Waveguide Bandpass Filters"Superconductor Science and Technology. 12. 978-980 (1999)

Haruichi Kanaya等：《单芯片高温超导共面波导带通滤波器的设计与制备》超导科学与技术。