Design and Performance of a Broadband Optical Modulator With Superconducting Electrodes

具有超导电极的宽带光调制器的设计和性能

• 批准号: 09555014
• 负责人: YOSHIDA Keiji
• 金额: $ 7.17万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (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-09555014/
• 关键词: superconductor; optical modulator; microwave-optical device; LiNbO_3

We have studied a low 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 modulation of the optical wave.1. The design of resonant type optical modulators with impedance matching circuits is 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.

本文研究了一种应用于强度调制光波载送微波信号的副载波光传输系统的高压超导谐振型电极光调制器。结果表明，采用高Q值超导电极可以有效地实现光波的微波调制。利用LiNbO掺杂D23掺杂D2（LN）光调制器和YBa掺杂D22掺杂D2Cu掺杂D23掺杂D2O掺杂D2x掺杂D2（YBCO）电极进行了初步实验，证明了光波的直流和调制.提出了一种具有阻抗匹配电路的谐振型光调制器的设计方法，并以MgO衬底上的YBCO薄膜为电极。数值计算表明，采用高Q超导体作为电极，调制效率提高.我们提出了一个初步的实验的光调制器，这是实现了由LN和MgO基板倒装芯片键合。在此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作的高Tc超导电极光调制器具有良好的工作性能。

项目成果

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

K，Yoshida 等人：“采用各向异性复合电导率的高温超导传输线建模”IEICE Trans，Electron.. E83-C。

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。

Yutaka Kanda, et al.: "High Performance LiNbO3 Optimal Modulator with a Supercondcting Transmission Line"Proc. 1997, EUCAS Meet.. 78 (1997)

Yutaka Kanda 等人：“具有超导传输线的高性能 LiNbO3 最佳调制器”Proc。

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。

Y.Kanda et al: "Deuign and Performavce of LiNbO_3 Optical Modulator" Jpn.J.Appl.Phys. 37・6B. 2786-3738 (1998)

Y.Kanda 等：“LiNbO_3 光调制器的设计和性能”Jpn.J.Appl.Phys 37・6B 2786-3738 (1998)