Explanipedia

Thin-film lithium-niobate waveguide devices based on proton-exchange-induced anisotropy Open

Wei Jin, Kin Seng Chiang · 2025

Efficient Evanescent-Wave Electro-Optic Tuning on Silicon Nitride-Polymer Hybrid Waveguide Open

Yingzhou Yu, Yixin Chen, Shengpeng Zhang, Hao Zhang, Hao Yao , et al. · 2024

Precise mode control of laser-written waveguides for broadband, low-dispersion 3D integrated optics Open

Yuying Wang, Lijing Zhong, K. Y. Lau, Xuhu Han, Yi Yang , et al. · 2024

Three-dimensional (3D) glass chips are promising waveguide platforms for building hybrid 3D photonic circuits due to their 3D topological capabilities, large transparent windows, and low coupling dispersion. At present, the key challenge i…

Robustness and stability of doubly periodic patterns of the focusing nonlinear Schrödinger equation Open

H. Yin, Jin Hua Li, Zhigang Zheng, Kin Seng Chiang, K. W. Chow · 2024

The nonlinear Schrödinger equation possesses doubly periodic solutions expressible in terms of the Jacobi elliptic functions. Such solutions can be realized through doubly periodic patterns observed in experiments in fluid mechanics and op…

Nonlinear mode coupling in graphene-buried optical waveguides Open

Lianzhong Jiang, Wenfan Jiang, Kin Seng Chiang · 2023

The photothermal effect of graphene, which refers to the effect of converting light absorbed by graphene into heat, offers an effective physical mechanism for the realization of all-optical control devices. In this paper, we explore this p…

All-Optical Tunable Filter With a Graphene-Buried Long-Period Waveguide Grating Open

Lianzhong Jiang, Wenfan Jiang, Kin Seng Chiang · 2023

We demonstrate low-power all-optical tunable filters with long-period gratings formed in graphene-buried polymer waveguides, where the heat generated by graphene's absorption of the TE-polarized pump light serves to tune the TM-polarized r…

Thin-film lithium-niobate modulator with a combined passive bias and thermo-optic bias Open

Mengke Wang, Junhui Li, Hao Yao, Xuepeng Li, Jieyun Wu , et al. · 2022

It is essential to bias a thin-film lithium-niobate Mach-Zehnder electro-optic (EO) modulator at the desired operation condition to ensure optimal performance of the modulator. While thermo-optic (TO) control can solve the problem of bias …

Fermi–Pasta–Ulam–Tsingou recurrence in two-core optical fibers Open

Jin Hua Li, Huimin Yin, Kin Seng Chiang, K. W. Chow · 2022

Long-period gratings on lithium-niobate waveguides: phase-matching turning points for ultra-broadband mode conversion Open

Chenxu Lu, Wei Jin, Kin Seng Chiang · 2022

We analyze a polymer long-period grating (LPG) formed on the surface of a z -cut lithium-niobate (LN) few-mode waveguide for TM 00 –TM 10 mode conversion. We identify and explore the turning points along the phase-matching curves of the LP…

Spacing-Tailored Multicore Fiber Interface for Efficient FIFO Devices Open

Wei Ji, Zihao Shen, Ruowei Yu, Caoyuan Wang, Zhengyu Yan , et al. · 2022

Multicore fibers (MCFs) have attracted intense attention to overcome the capacity limit of single-core optical fiber communication system. However, as indispensable connection devices between the MCF and the individual single mode fiber (S…

All-optical mode switching with a graphene-buried polymer waveguide directional coupler Open

Lianzhong Jiang, Kin Seng Chiang · 2022

We demonstrate all-optical mode switching with a graphene-buried polymer waveguide asymmetric directional coupler (DC) by using the photothermal effect of graphene, where TE-polarized pump light and TM-polarized signal light are employed t…

A vapochromic dye/graphene coated long-period fiber grating for benzene vapor sensing Open

Lianghai Dong, Ke Zhao, Jieyun Wu, Guowei Deng, Chunlan Tang , et al. · 2022

A vapochromic dye was synthesized and coated on a long-period fiber grating sensor for specific benzene vapor sensing with an ultra-large dynamic range.

Engineering of metal–organic framework nanomaterials on long-period fiber grating for acetone vapor sensing Open

Haishi Wang, Guowei Deng, Lianghai Dong, Ke Zhao, Kaixin Chen , et al. · 2022

The long-period fiber grating was functionalized with metal–organic framework nanomaterial ZIF-8 for sensitive acetone vapor sensing with large dynamic range and fast response.

Leaky-mode long-period grating on a lithium-niobate-on-insulator waveguide Open

Wei Jin, Kin Seng Chiang · 2021

Lithium niobate on insulator (LNOI) is a promising platform for the construction of high-density integrated photonics circuits. In this paper, we propose compact long-period gratings (LPGs) formed on LNOI rib waveguides for achieving light…

Lab on optical fiber: surface nano-functionalization for real-time monitoring of VOC adsorption/desorption in metal-organic frameworks Open

Jieyun Wu, Chunlan Tang, Wanying Zhang, Xiaoxia Ma, Shi‐Wei Qu , et al. · 2021

Metal-organic framework (MOF) nanomaterials are emerging porous coordinative polymers with large surface area and high porosity. Their application scenarios highly depend on adsorption/desorption dynamics of guest molecules in the framewor…

Ultralow-loss fusion splicing between negative curvature hollow-core fibers and conventional SMFs with a reverse-tapering method Open

Caoyuan Wang, Ruowei Yu, Benoît Debord, Frédéric Gérôme, Fetah Benabid , et al. · 2021

Negative curvature hollow-core fibers (NC-HCFs) can boost the excellent performance of HCFs in terms of propagation loss, nonlinearity, and latency, while retaining large core and delicate cladding structures, which makes them distinctly d…

Electro-optic reconfigurable two-mode (de)multiplexer on thin-film lithium niobate Open

Mengruo Zhang, Kaixin Chen, Mengke Wang, Jieyun Wu, Kin Seng Chiang · 2021

We propose and demonstrate a compact electro-optic reconfigurable two-mode (de)multiplexer using the configuration of cascaded Mach–Zehnder interferometers formed on thin-film X-cut lithium niobate on silica. Our fabricated device, which i…

Electro-optic mode-selective switch based on cascaded three-dimensional lithium-niobate waveguide directional couplers Open

Mengruo Zhang, Kaixin Chen, Wei Jin, Jieyun Wu, Kin Seng Chiang · 2020

We propose an electro-optic mode-selective switch based on cascaded three-dimensional lithium-niobate waveguide directional couplers fabricated with a single-step annealed proton-exchange process. To compensate for discrepancies due to unc…

Electrically generated optical waveguide in a lithium-niobate thin film Open

Qingming Chen, Yujiao Zhu, Di Wu, Tenghao Li, Zhaohui Li , et al. · 2020

This paper reports an electrically generated optical waveguide for the transverse-magnetic wave. The waveguide is formed in a z -cut single-crystal lithium-niobate (LN) thin film by the electro-optic effect, where the extraordinary refract…

Polarization-insensitive ultra-broadband mode filter based on a 3D graphene structure buried in an optical waveguide Open

Quandong Huang, Kin Seng Chiang · 2020

We propose a polarization-insensitive ultra-broadband mode filter based on a 3D graphene structure buried in a few-mode optical waveguide. Our experimental device fabricated by burying an L-shaped graphene structure in a three-mode polymer…

Graphene electrodes for electric poling of electro-optic polymer films Open

Wen Wang, Jieyun Wu, Kaixin Chen, Quandong Huang, Jingdong Luo , et al. · 2020

We propose electric poling of electro-optic (EO) polymer films with graphene electrodes. The use of graphene electrodes can waive the use of buffer layers and minimize the poling voltage. To demonstrate the idea, we prepared EO polymer thi…

Reconfigurable Three-Mode Converter Based On Cascaded Electro-Optic Long-Period Gratings Open

Wei Jin, Kin Seng Chiang · 2020

We propose an optical waveguide switch to realize complete reconfigurable mode conversion for three spatial modes. This device consists of three cascaded long-period grating mode converters of different types integrated along a three-mode …

Polarization-insensitive mode-independent thermo-optic switch based on symmetric waveguide directional coupler Open

Xibin Wang, Kin Seng Chiang · 2019

We propose a thermo-optic switch based on a symmetric directional coupler formed with two parallel identical two-mode waveguides, where the two modes in one waveguide can be simultaneously switched to the corresponding modes in the other w…

Effects of Injection Current on the Modulation Bandwidths of Quantum-Dot Light-Emitting Diodes Open

Hua Xiao, Xiangtian Xiao, Dan Wu, Rui Wang, Kai Wang , et al. · 2019

This article presents an investigation of the modulation bandwidths of quantum-dot (QD) light-emitting diodes (QLEDs). The QLEDs used in our study are red-emissive CdSe/ZnS QLEDs, which have a structure of indium tin oxide (ITO)/poly(3.4-e…

Table of Contents Open

Kin Seng Chiang · 2019

Comparison of different optical models of graphene for the analysis of graphene-attached microfibers and D-shaped fibers Open

Ting Hao, Zeshan Chang, Kin Seng Chiang · 2019

All-optical loss modulation with graphene-buried polymer waveguides Open

Zeshan Chang, Kin Seng Chiang · 2019

We present an analysis of all-optical loss modulation in a graphene-buried waveguide based on the Pauli blocking effect. We show that, to realize effective loss modulation, both the signal light and the co-propagating control light must be…

Ultra-Broadband Mode Filter Based on Phase-Shifted Long-Period Grating Open

Quandong Huang, Wen Wang, Wei Jin, Kin Seng Chiang · 2019

We propose an ultra-broadband mode filter based on the structure of a phase-shifted long-period grating formed along a few-mode waveguide terminated with two linear tapers. To demonstrate the operation principle, we design a mode filter to…

High-Order-Mode-Pass Mode (De)Multiplexer With a Hybrid-Core Vertical Directional Coupler Open

Quandong Huang, Kin Seng Chiang · 2019

We propose a high-order-mode-pass mode (de)multiplexer based on the structure of a vertical waveguide directional coupler formed with a few-mode core and a single-mode core that has a higher refractive index. Unlike a conventional directio…

Buried graphene electrode heater for a polymer waveguide thermo-optic device Open

Xibin Wang, Wei Jin, Zeshan Chang, Kin Seng Chiang · 2019

We propose the use of graphene as the electrode heater material for a polymer waveguide thermo-optic (TO) device. Because a graphene electrode can be buried in a polymer waveguide without introducing a significant loss to the transverse ma…

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