Article
Optics
Weipeng Zhang, Chaoran Huang, Hsuan-Tung Peng, Simon Bilodeau, Aashu Jha, Eric Blow, Thomas Ferreira de Lima, Bhavin J. Shastri, Paul Prucnal
Summary: This study experimentally demonstrates a record-high precision for photonic synapses with a dithering control scheme and numerically investigates the impact of increased synaptic precision on signal classification. It provides insights into the potential of photonic neural networks for practical applications.
Article
Engineering, Electrical & Electronic
Xun Guan, Wei Shi, Leslie Ann Rusch
Summary: Silicon photonics combined with microring modulators can achieve ultra-dense wavelength division multiplexing transmission, enhancing spectral efficiency. The study reports achieving channel spacing comparable to the symbol rate in each WDM channel, reaching 80% spectrum occupation, while also addressing interchannel interference issues.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Vittorio Grimaldi, Francesco Zanetto, Fabio Toso, Ioannis Roumpos, Themistoklis Chrysostomidis, Alessandro Perino, Matteo Petrini, Francesco Morichetti, Andrea Melloni, Nikos Pleros, Miltiadis Moralis-Pegios, Konstantinos Vyrsokinos, Giorgio Ferrari, Marco Sampietro
Summary: This paper demonstrates the possibility of automatically stabilizing the working condition of an integrated Silicon Photonics microring modulator with a novel dithering-based control scheme. The proposed feedback strategy leverages a real-time acquisition of the modulator non-linear transfer function (TF) and operates by setting the target locking point to the zero of the TF second derivative, i.e. where the ring slope is maximum. The control performances, made possible by an FPGA-based platform ensuring a 30 ms response time, are assessed in a 50 Gbit/s routing scenario, demonstrating effective compensation of wavelength and thermal variations and successful transmission even in demanding environments.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xun Guan, Mingyang Lyu, Wei Shi, Leslie Ann Rusch
Summary: In this paper, we propose and experimentally demonstrate a polarization-insensitive single sideband modulator based on silicon microring modulators. The modulator splits and modulates the two orthogonal polarization states of an input laser using an on-chip silicon polarization splitter rotator, overcoming the polarization dependence of the silicon photonic modulator. The adoption of an MRM relieves the bandwidth limitation in polarization-diverse versions of SiP Mach-Zehnder modulators and improves the resistance of the modulated signal to chromatic dispersion.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Awanish Pandey, Sarvagya Dwivedi, Tang Zhenzhou, Shilong Pan, Dries Van Thourhout
Summary: This paper presents a method to achieve nonreciprocal optical transmission using compact ring modulators. By tuning the relative time delay between the RF driving signals and the optical delay between the modulators, nonreciprocal transmission can be achieved. The design utilizes a cascaded system of microring modulators with a small footprint, achieving a 16 dB difference between forward and backward optical signals.
Proceedings Paper
Engineering, Electrical & Electronic
Hao Zhang, Ye Yuan, Zan Zhang, Beiju Huang, Hongda Chen
Summary: This paper presents a scheme for thermal stabilization of microring modulators using an integrated temperature sensor and closed-loop control unit. The temperature of the modulator is directly monitored and used in a feedback loop to adjust the thermal tuner. Simulations show a wide temperature tuning range can be achieved.
OPTOELECTRONIC DEVICES AND INTEGRATION XI
(2022)
Article
Multidisciplinary Sciences
S. Schuler, J. E. Muench, A. Ruocco, O. Balci, D. van Thourhout, V. Sorianello, M. Romagnoli, K. Watanabe, T. Taniguchi, I. Goykhman, A. C. Ferrari, T. Mueller
Summary: The integration of a photo-thermoelectric graphene photodetector with a Si micro-ring resonator has successfully addressed the issue of low responsivity in graphene-based optical receivers. With a voltage responsivity of around 90 V/W and reduced energy-per-bit consumption, these receivers now perform on par with established semiconductor technology.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Yuguang Zhang, Hongguang Zhang, Junwen Zhang, Jia Liu, Lei Wang, Daigao Chen, Nan Chi, Xi Xiao, Shaohua Yu
Summary: This article presents an ultrafast microring modulator (MRM) with improved performance through optimized PN junction doping concentration. The MRM demonstrates the transmission of a 240 Gb/s PAM-8 signal over 2 km standard single-mode fiber (SSMF). By introducing optical peaking and using a titanium nitride heater, the electro-optic bandwidth of the MRM is further extended. High bit rate modulations, such as 120 Gb/s NRZ, 220 Gb/s PAM-4, and 240 Gb/s PAM-8, are achieved using the high-performance and compact MRM. The article also investigates the bit error ratio (BER) for different received optical power and 2 km SSMF transmission.
PHOTONICS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
David W. U. Chan, Xiong Wu, Zunyue Zhang, Chao Lu, Alan Pak Tao Lau, Hon Ki Tsang
Summary: This paper presents a compact and high-bandwidth CMOS compatible silicon microring modulator with an ultra-wide free-spectral range. By utilizing this modulator for intensity modulation-direct detection transmission and wavelength division multiplexing, high-speed data transmission is achieved.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Qiang Luo, Chen Yang, Zhenzhong Hao, Ru Zhang, Rui Ma, Dahuai Zheng, Hongde Liu, Xuanyi Yu, Feng Gao, Fang Bo, Yongfa Kong, Guoquan Zhang, Jingjun Xu
Summary: We report the realization of an ytterbium-doped lithium niobate microring laser operating in the 1060-nm band under the pump of a 980-nm-band laser. The monolithic laser has a low threshold and relatively high output power, making it suitable for various applications in lithium niobate photonics.
Article
Optics
Liming Shen, Rongguo Lu, Rui Lin, Jiangbo Lyu, Guangbiao Wang, Meng Tan, Yong Liu
Summary: This paper proposes a wavelength-tunable microring-assisted Mach-Zehnder modulator based on graphene structure, which enhances device linearity and performance through analyzing modulation characteristic curves and utilizing special structures.
Article
Multidisciplinary Sciences
Keith Powell, Liwei Li, Amirhassan Shams-Ansari, Jianfu Wang, Debin Meng, Neil Sinclair, Jiangdong Deng, Marko Loncar, Xiaoke Yi
Summary: The authors demonstrate an electro-optic modulator based on Silicon Carbide, which shows promising potential for quantum and optical communications. The modulator is fabricated using a CMOS foundry compatible process, and features small form-factor, high bandwidth, and stable operation.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zequn Chen, Maoliang Wei, Ye Luo, Jialing Jian, Yuting Ye, Yuexin Yin, Chunlei Sun, Chuyu Zhong, Ke Si, Daming Zhang, Hongtao Lin, Lan LI
Summary: By utilizing the sol-gel TiO2 platform, the research team achieved highly efficient TO tunable microring resonators in the 1310-nm waveband, with a high thermal tuning efficiency and TO modulator figure of merit, providing a new research direction for photonic integrated circuits and other applications.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Optics
Chi Xu, William E. Hayenga, Demetrios N. Christodoulides, Mercedeh Khajavikhan, Patrick LiKamWa
Summary: We demonstrate how the gain-loss contrast between two coupled identical resonators can be utilized to enhance the modulation frequency response of laser diodes. By adjusting the ratio of injection current levels, significant bandwidth improvement is achieved, up to 1.63 times the fundamental resonant frequency of individual devices.
Article
Optics
Ruidong Cao, Yuting He, Ruiqi Zheng, Ziwen He, Yanyan Zhi, Xudong Wang, Jiejun Zhang, Jianping Yao
Summary: In this paper, a photonics-assisted method for instantaneously measuring the frequency of a microwave signal using a silicon integrated microring resonator (MRR) is proposed and experimentally demonstrated. The unique relationship between the frequency of a microwave signal and the power ratio between two microwave signals at the outputs of complementary frequency-response microwave photonic filters (MPFs) is utilized. By employing a silicon integrated MRR as the key device to implement the MPFs, the phase-modulated optical signal is converted to an intensity-modulated optical signal. The designed and fabricated MRR achieves an instantaneous microwave frequency (IMF) measurement range of 14-25 GHz with a measurement accuracy of +/- 0.2 GHz.
