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Efficient frequency conversion of photons has important applications in optical quantum technology because the frequency range suitable for photon manipulation and communication usually varies widely. Recently, an efficient frequency…

A tutorial on opto-electronic clock regeneration at very high bit rates beyond reach with purely electronic solutions is given. Emphasis is placed on sum frequency generation in a nonlinear material such as LiNbO3. We first provide a basic…

光学 · 物理学 2025-10-27 Palle Jeppesen , Bjarne Tromborg

Energy efficiency (EE) optimization of millimeter wave (mm-Wave) massive multiple-input multiple-output (MIMO) systems is emerging as an important challenge for the fifth generation (5G) mobile communication systems. However, the power of…

信号处理 · 电气工程与系统科学 2019-01-03 Kai Chen , Jing Yang , Xiaohu Ge , Yonghui Li , Lin Tian , Jinglin Shi

Active metasurfaces incorporating electro-optic (EO) materials enable high-speed free-space optical modulators that show great promise for a wide range of emerging applications, including free-space optical communication, light detection…

光学 · 物理学 2026-04-07 Go Soma , Koto Ariu , Seidai Karakida , Yusuke Tsubai , Takuo Tanemura

Integrated electro-optic (EO) modulators are fundamental photonics components with utility in domains ranging from digital communications to quantum information processing. At telecommunication wavelengths, thin-film lithium niobate…

Receiver sensitivity is a particularly important metric in optical communication links operating at low signal-to-noise ratios (SNRs), for example in deep-space communication, since it directly limits the maximum achievable reach and data…

信号处理 · 电气工程与系统科学 2021-04-23 Ravikiran Kakarla , Mikael Mazur , Jochen Schröder , Peter A. Andrekson

To translate electrical into optical signals one uses the modulation of either the refractive index or the absorbance of a material by an electric field. Contemporary electroabsorption modulators (EAMs) employ the quantum confined Stark…

We demonstrate an electronic-photonic (EP) interface for multiuser optical wireless communication (OWC), consisting of a multibeam optical phased array (MBOPA) along with co-integrated electro-optic (EO) modulators and high-speed CMOS…

光学 · 物理学 2025-10-16 Youngin Kim , Laurenz Kulmer , Jae-Yong Kim , Hamza Kurt , Juerg Leuthold , Hua Wang

Electro-optic (EO) modulation is a key functionality to have on-chip. However, achieving a notable linear EO effect in stoichiometric silicon nitride has been a persistent challenge due to the material's intrinsic properties. Recent…

光学 · 物理学 2024-10-23 Christian Lafforgue , Boris Zabelich , Camille-Sophie Brès

The massive multiple-input multiple-output (MIMO) transmission technology has recently attracted much attention in the non-geostationary, e.g., low earth orbit (LEO) satellite communication (SATCOM) systems since it can significantly…

信息论 · 计算机科学 2022-08-18 Li You , Xiaoyu Qiang , Ke-Xin Li , Christos G. Tsinos , Wenjin Wang , Xiqi Gao , Björn Ottersten

We consider two-way amplify and forward relaying, where multiple full-duplex user pairs exchange information via a shared full-duplex massive multiple-input multiple-output (MIMO) relay. Most of the previous massive MIMO relaying works…

信息论 · 计算机科学 2017-10-05 Ekant Sharma , Rohit Budhiraja , K Vasudevan , Lajos Hanzo

Achieving an increase in the spectral efficiency (SE) has always been a major driver in the design of communication systems. The use of MIMO techniques in mobile communications has achieved significant benefits in improving the system…

信号处理 · 电气工程与系统科学 2018-03-22 Pol Henarejos , Ana I. Pérez-Neira

One of the main milestones in the study of opto- and electro-mechanical systems is to certify entanglement between a mechanical resonator and an optical or microwave mode of a cavity field. In this work, we show how a suitable time-periodic…

量子物理 · 物理学 2015-06-03 A. Mari , J. Eisert

Superconducting cavity electro-optics (EO) presents a promising route to coherently convert microwave and optical photons and distribute quantum entanglement between superconducting circuits over long-distance through an optical network.…

We design and demonstrate a compact and low-power band-engineered electro-optic (EO) polymer refilled silicon slot photonic crystal waveguide (PCW) modulator. The EO polymer is engineered for large EO activity and near-infrared…

光学 · 物理学 2015-06-18 Xingyu Zhang , Amir Hosseini , Jingdong Luo , Alex K. -Y. Jen , Ray T. Chen

In this paper, we propose a kind of optical-electrical-optical (OEO) repeater station for the time transfer based on bidirectional time division multiplexing transmission over a single fiber with the same wavelength (BTDM-SFSW). Along the…

光学 · 物理学 2017-10-25 Hao Zhang , Guiling Wu , Xinwan Li , Jianping Chen

We present an optical method to measure radio-frequency electro-optic phase modulation profiles by employing spectrum-to-time mapping realized by highly chirped optical pulses. We directly characterize temporal phase modulation profiles of…

仪器与探测器 · 物理学 2017-11-23 Michał Jachura , Jan Szczepanek , Wojciech Wasilewski , Michal Karpinski

User electromagnetic (EM) exposure is continuously being exacerbated by the evolution of multi-antenna portable devices. To mitigate the effects of EM radiation, portable devices must satisfy tight regulations on user exposure level,…

信息论 · 计算机科学 2021-07-27 Jiayuan Xiong , Li You , Derrick Wing Kwan Ng , Wenjin Wang , Xiqi Gao

Linking superconducting quantum devices to optical fibers via microwave-optical quantum transducers may enable large scale quantum networks. For this application, transducers based on the Pockels electro-optic (EO) effect are promising for…

Massive multi-input multi-output (MIMO) can support high spectral efficiency (SE) with simple linear transceivers, and is expected to provide high energy efficiency (EE). In this paper, we analyze the EE of downlink multi-cell massive MIMO…

信息论 · 计算机科学 2015-05-28 Wenjia Liu , Shengqian Han , Chenyang Yang