Development of high gain and broadband superconducting booster circuit for optical modulator

光调制器高增益宽带超导升压电路的研制

• 批准号: 12555013
• 负责人: YOSHIDA Keiji
• 金额: $ 8.06万
• 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555013/
• 关键词: Superconductor; Optical Modulator; Microwave-Optical Device

The design and performance of a LiNbO3 optical modulator and switch, which employ superconducting circuits, have been studied. Based on a novel design method of the booster circuit using superconducting coplanar waveguide transmission lines, we designed a voltage amplifier with center frequency of 10GHz, bandwidth of 5MHz, and the voltage gain of 33dB using an electromagnetic wave simulator. We also designed a high-speed optical switch combining optical directional coupler and Mach-Zehnder interferometer.A preliminary experiment with YBCO electrode on MgO substrate flip-chip-bonded on LiNbO3 optical waveguide has been made. We designed the booster circuit with the meanderline 3-pole Chebyshev filter fabricated by a YBCO thin film on a MgO substrate with the dimension of 10[mm]×10[mm]. The YBCO electrode on MgO substrate was flip-chip bonded onto an optical waveguide in a LiNbO3 substrate, and was cooled down by a refrigerator. The comparison of the observed group delay of S11 (return loss) of the device and the simulation results. The observed data are in reasonable agreements with those expected from theory.

本文研究了采用超导电路的铌酸锂光调制器和光开关的设计和性能。基于超导共面波导传输线升压电路的一种新的设计方法，利用电磁波模拟器设计了一个中心频率为10 GHz、带宽为5 MHz、电压增益为33 dB的电压放大器。设计了一种结合光定向耦合器和Mach-Zehnder干涉仪的高速光开关，并将YBCO电极倒装在LiNbO 3光波导上进行了初步实验。我们设计了一个由YBCO薄膜在MgO衬底上制作的弯折线3极点切比雪夫滤波器的升压电路，滤波器的尺寸为10[mm]×10[mm]。将MgO衬底上的YBCO电极倒装键合到LiNbO 3衬底上的光波导上，并通过制冷机冷却。器件的群时延S11（回波损耗）实测值与仿真结果的比较。观测数据与理论预期值吻合较好。

项目成果

K. Yoshida, et al.: "Design and performance of high gain superconducting booster circuit for LiNbO3 optical modulator"Physica C. 372. 360-363 (2002)

K. Yoshida等：“LiNbO3光调制器高增益超导升压电路的设计与性能”Physica C. 372. 360-363 (2002)

K.Yoshida, et al.: "Design and Performance of Superconducting Circuit for LiNbO3 Optical Modulator and Switch"IEEE Trans.Appl.Supercond.. 12(in press). (2003)

K.Yoshida 等人：“LiNbO3 光调制器和开关的超导电路的设计和性能”IEEE Trans.Appl.Supercond.. 12（印刷中）。

H.Kanaya, et al.: "Design and Performance of High Tc Superconducting Coplanar Waveguide Matching Circuit for RF-CMOS LNA"IEICE Trans. Electron.. E86-C. 37-41 (2003)

H.Kanaya 等人：“RF-CMOS LNA 的高温超导共面波导匹配电路的设计和性能”IEICE Trans。

K.Yoshida, et al.: "Design and performance of high gain superconducting booster circuit for LiNbO3 optical modulator"Physica C. 372. 360-363 (2002)

K.Yoshida等：“LiNbO3光调制器高增益超导升压电路的设计与性能”Physica C. 372. 360-363 (2002)

K. Yoshida, et al.: "Design and Performance of Superconducting Circuit for LiNbO3 Optical Modulator and Switch"IEEE Trans. Appl. Supercond. 12. (in press). (2003)

K. Yoshida 等人：“LiNbO3 光调制器和开关的超导电路的设计和性能”IEEE Trans。