Broadband and Low Driving-Voltage LiNb0_3 Optical Modulator with High Tc Superconducting Transmission Line

具有高温超导传输线的宽带低驱动电压LiNb0_3光调制器

• 批准号: 12650015
• 负责人: YOSHIDA Keiji
• 金额: $ 2.24万
• 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650015/
• 关键词: Superconductor; Optical Modulator; Microwave-Optical Device; マイクロ波・光変調器

Design and performance of a LiNbO_3 optical modulator for subcarrier optical transmission employing a high gain superconducting booster circuit have been studied. Based on a new design theory for the high gain booster circuit, we designed a voltage amplifier with center frequency of lOGHz, bandwidthof 5MHz, and the voltage gain of 33dB using anelectromagnetic wave simulator. A preliminary experiment with YBCO electrode on MgO substrate flip chip bonded on LiNbO_3 optical waveguide has also been made.(1) We study the gain of the booster circuit using the circuit model with coplanar waveguide (CPW) transmission lines (transmission line model), design the practical device with the voltage gain of 33 [dB] by the electromagnetic wave (EM) simulator.(2) In order to confirm the proposed design theory, we carried out the experiment. We show the pattern of the modulation electrode with the meanderline 3-pole Chebyshev filter fabricated by a YBCO thin film on a MgO substrate with the dimension of 10 [mm] x 10 [mm]. The YBCO electrode on MgO substrate was flip-chip bonded onto an optical waveguide in a LiNbO_3 substrate, and was cooled down by a refrigerator. We show the observed group delay of S11 of the device. The observed data find traces of those expected from theory.

研究了采用高增益超导升压电路的用于子载波光传输的LiNbO_3光调制器的设计和性能。基于新的高增益升压电路设计理论，利用电磁波模拟器设计了中心频率为10GHz、带宽为5MHz、电压增益为33dB的电压放大器。还对MgO衬底上的YBCO电极倒装芯片键合在LiNbO_3光波导上进行了初步实验。(1)我们使用共面波导(CPW)传输线的电路模型(传输线模型)研究了升压电路的增益,通过电磁波（EM）模拟器设计了电压增益为33[dB]的实用装置。（2）为了证实所提出的设计理论，我们进行了实验。我们展示了带有曲折线 3 极切比雪夫滤波器的调制电极图案，该滤波器由尺寸为 10 [mm] x 10 [mm] 的 MgO 基板上的 YBCO 薄膜制成。将MgO基板上的YBCO电极倒装芯片接合到LiNbO_3基板中的光波导上，并通过制冷机冷却。我们展示了观察到的器件 S11 的群延迟。观察到的数据发现了理论预期的痕迹。

项目成果

H. Kanaya et al.: "Design of Minialurized Superconducting Coplanar Waveguide Filters with Highly Packed Meanderlines"Proceedings of Progress In Electromagnetics Research Symposium (PIERS 2001). 454-454

H. Kanaya 等人：“具有高密度曲折线的小型化超导共面波导滤波器的设计”电磁学研究研讨会进展论文集 (PIERS 2001)。

K.Yoshida, et al.: "Design and Performance of High Gain Superconducting Booster Circuit for LiNbO3 Optical Modulator"Physica C. (to be published). (2002)

K.Yoshida等人：“LiNbO3光学调制器的高增益超导升压电路的设计和性能”Physica C.（待出版）。

K.Yoshida, et al.: "Optical Modulator with Superconducting Resonant Electrodes for Subcarrier Optical Transmission"Inst.Phys.Conf.Ser.. 167. 375-378 (2000)

K.Yoshida 等：“用于副载波光传输的具有超导谐振电极的光调制器”Inst.Phys.Conf.Ser.167. 375-378 (2000)

吉田啓二: "高温超伝導による高周波受動部品"電気学会技術報告. 783. 18-22 (2000)

Keiji Yoshida：《基于高温超导性的高频无源元件》日本电气工程师学会技术报告 783. 18-22 (2000)。

H. Kanaya et al.: "Miniaturized HTS Coplanar Waveguide Bandpass Filters with Highly Packed Meanderlines"IEEE Trans. Appl. Supercond.. Vol. 11 No. 1. 481-484 (2001)

H. Kanaya 等人：“具有高度密集曲折线的小型化 HTS 共面波导带通滤波器”IEEE Trans。