Article
Nanoscience & Nanotechnology
Jiaqi Niu, Shanglin Yang, Ting Zhou, Hao Jia, Xin Fu, Zhizun Zhao, Zhen Li, Gaolu Zhang, Changhua Chen, Lin Yang
Summary: This paper presents the design and experimental demonstration of a high-speed dual-mode 4 x 4 optical switch based on a mode-diversity scheme. By reducing the number of optical switch units, the switch achieves fast switching and lower power consumption, while maintaining good transmission performance.
Article
Engineering, Electrical & Electronic
Yuexin Yin, Xinru Xu, Xinyu Lv, Bo Tang, Peng Zhang, Daming Zhang
Summary: In this letter, a 3x3 optical switch with p-i-n phase shifters is demonstrated. The switch has low insertion losses, low crosstalk, and fast response time.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Li-Yuan Chiang, Chun-Ta Wang, Steve Pappert, Paul K. L. Yu
Summary: An ultralow-V pi L photonic switch device with high modulation efficiency and low loss-efficiency product is demonstrated using silicon slot waveguides and nematic liquid crystals. The device achieves a V-pi of 0.013 V and an extinction ratio of 9dB at 1550 nm wavelength, with estimated power consumption below 0.6 nW and a response time of <1.5 ms. A comparative performance study shows that the directional coupler switch has a smaller footprint and lower optical loss compared to a similar design MZI switch, making it a strong candidate for switch matrix designs and applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Optics
Hanke Feng, Ke Zhang, Wenzhao Sun, Yangming Ren, Yiwen Zhang, Wenfu Zhang, Cheng Wang
Summary: This research demonstrates a highly linear lithium niobate (LN) modulator with an ultra-high spurious-free dynamic range (SFDR) using a ring-assisted Mach-Zehnder interferometer configuration. The modulation does not require active feedback controls to suppress third-order intermodulation distortions (IMD3), resulting in a significant improvement over previous results in the thin-film LN platform.
PHOTONICS RESEARCH
(2022)
Article
Optics
Wei Gao, Xin Li, Liangjun Lu, Chenghan Liu, Jianping Chen, Linjie Zhou
Summary: This paper reports a large-scale 32 x 32 S&S optical switch on a multi-layer Si3N4-on-SOI platform. The switch chip incorporates 1984 broadband thermo-optic Mach-Zehnder interferometer (MZI)-based switch elements, 246,016 three-dimensional (3D) waveguide crossings, and 2048 interlayer couplers. It achieves approximately 1 dB 3D waveguide crossings and approximately 0.3 dB interlayer couplers, reducing the overall insertion loss and footprint of the switch chip. The measured average fiber-to-fiber insertion loss is 12.88 dB at 1580 nm wavelength, and the crosstalk is less than -20.7 dB. The power consumption of the entire switch chip is only approximately 0.98 W. High-fidelity optical transmission of a 50 Gb/s quadrature phase-shift keying signal verifies the high-performance routing capability of this chip. These results suggest that the large-scale optical switch with broadband, low crosstalk, and high-power efficiency is promising for datacenter optical network applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Tao Ma, Yongsheng Tian, Linxing Su, Huan Wang, Heng Liu, Fang Wang
Summary: The performance of EO modulators based on polymer-embedded silicon racetrack resonators is investigated, and the modulation performances of different materials are compared. The results show that modulators embedded with lithium niobate achieve high modulation depth and low wavelength tuning, while modulators embedded with hybrid materials have high wavelength tuning but low modulation depth.
Article
Nanoscience & Nanotechnology
Brian S. Lee, Bumho Kim, Alexandre P. Freitas, Aseema Mohanty, Yibo Zhu, Gaurang R. Bhatt, James Hone, Michal Lipson
Summary: Graphene-based electro-optic modulators demonstrate higher bandwidth and performance at low temperatures, offering a solution to the reduced bandwidth issue of existing integrated modulators in cryogenic applications.
Article
Engineering, Electrical & Electronic
Ryotaro Konoike, Akio Yoshizawa, Shu Namiki, Kazuhiro Ikeda
Summary: We studied a 32 x 32 silicon photonic switch that can be used as a programmable multiport interferometer, with stability suitable for both classical and quantum photonic applications. The experimental results demonstrate that our optical circuit has a wide range of potential applications in classical and quantum photonic processors based on a multiport input-output interference design.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Ziliang Ruan, Kaixuan Chen, Zong Wang, Xuancong Fan, Ranfeng Gan, Lu Qi, Yiwei Xie, Changjian Guo, Zhonghua Yang, Naidi Cui, Liu Liu
Summary: This study introduces a SiN and LN heterogeneous integration platform that supports high-performance EO modulators on SiN waveguide circuits. An efficient evanescent coupling structure is realized for low-loss light transitions between the SiN waveguide and the LN ridge waveguide. Based on this platform, an unprecedented EO Mach-Zender interference modulator on SiN is built with remarkable loss, efficiency, and bandwidth performances.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Yuewen Gao, Yu Gu, Toshiaki Iitaka, Zhi Li
Summary: It is discovered that semiconductors synthesized under high pressure, such as MgSiN2, SrSiN2, and BaSiN2, can exhibit a large bandgap and high linear electro-optic coefficient due to the enhanced valence bond strength. The research demonstrates the feasibility of enhancing the linear electro-optic coefficient through high-pressure treatment.
Article
Materials Science, Multidisciplinary
Mengke Wang, Yixin Chen, Shengpeng Zhang, Lianghai Dong, Hao Yao, Huajun Xu, Kaixin Chen, Jieyun Wu
Summary: Emerging technologies, such as artificial intelligence (AI) and big data, are driving the exponential growth of data traffic in fiber-optic communication networks. Electro-optic (EO) modulators, utilizing the electro-optic effect, have emerged as promising candidates for high-speed and high-efficiency optical transceivers. Pockels electro-optic materials, including organic poled polymers and inorganic thin-film lithium niobate, have unique material properties that make them suitable for achieving high-speed and high-efficiency EO modulation.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
Zequn Chen, Maoliang Wei, Boshu Sun, Yang Weng, Jialing Jian, Chuyu Zhong, Chunlei Sun, Ke Si, Wei Gong, Hongtao Lin, Lan Li
Summary: This paper presents the first demonstration of flexible titanium oxide thermo-optic switches based on a Mach-Zehnder interferometer structure. The flexible switches show low insertion loss and power consumption, and exhibit excellent mechanical stability, making them promising for future flexible optoelectronic systems.
Article
Materials Science, Multidisciplinary
Inhwan Kim, Therese Paoletta, Alexander A. Demkov
Summary: This study conducts a first-principles investigation on the electro-optic response and Pockels tensor of barium titanate under tetragonal P4mm structure. The results show good agreement with experiments when the P4mm structure is considered as a dynamic average of four lower symmetry Cm structures. The large value of the Raman component of the electro-optic coefficient is attributed to the low frequency and strong electron-phonon coupling of the lowest optical mode, and the large piezoelectric contribution is traced to the large components of the piezoelectric and elasto-optic tensors.
Article
Engineering, Electrical & Electronic
Srinivasa Reddy Tamalampudi, Ghada Hamed Dushaq, Juan E. Villegas, Bruna Paredes, Mahmoud S. Rasras
Summary: In this study, the tuning of the optical index of refraction based on hybrid integration of multi-layered anisotropic GaGeTe on a silicon micro-ring resonator (Si-MRR) is demonstrated. The device exhibits a linear resonance shift under TE polarization and both amplitude and phase modulation under TM polarization. The device also shows good dynamic RF response and has great potential for integrated photonic applications on the silicon photonics platform.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Zihan Zhou, Meng Chao, Xinxin Su, Shuanglin Fu, Ruonan Liu, Zhihua Li, Shuhui Bo, Zhuo Chen, Zhenlin Wu, Xiuyou Han
Summary: This paper presents an SOH-integrated electro-optic modulator (EOM) and investigates its structure design, silicon waveguide fabrication, on-chip poling of organic electro-optic material, and modulation response characterization. The experimental results demonstrate that the SOH-integrated EOM has a high bandwidth, low power consumption, and can be used in microwave photonic phase shifter.