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.

我们研究了一种采用高Tc超导谐振型电极的低压光调制器，用于子载波光传输系统，其中微波信号由强度调制光波承载。结果表明，光波可以进行微波调制。通过使用具有高 Q 因子的超导电极来提高效率 使用 LiNbOD23D2 (LN) 光调制器进行初步实验。 YBaiD22D2CuiD23D2OD2xD2(YBCO)电极演示了光波的直流和调制。 1．提出了具有阻抗匹配电路的谐振型光调制器的设计，并采用MgO衬底上的YBCO薄膜作为电极，通过数值计算表明：采用高Q值超导体作为电极，调制效率提高。 2．我们对LN和MgO衬底倒装键合实现的光调制器进行了初步实验，并在设计和计算的基础上进行了低温调制实验，证明了该光调制器具有高Tc。超导电极通过倒装芯片接合方法有效运行。

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。

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。

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。

Y.Kanda et al.: "Modeling of Microwave Characteristics of YBa_2Cu_3Ox Thin Films" Proc.HTSED'97. 74-76 (1997)

Y.Kanda 等人：“YBa_2Cu_3Ox 薄膜的微波特性建模”Proc.HTSED97。

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)