A5100348697- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Mechanical and Optical Resonators
- Neural Networks and Reservoir Computing
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Optical Network Technologies
- VLSI and Analog Circuit Testing
- Radiation Effects in Electronics
Shanghai Jiao Tong University
2022-2024
Polarization devices on lithium niobate thin film (LNTF) are vital components for photonic integrated circuits (PICs) the novel platform. Because both linear and nonlinear anisotropic platform intrinsically polarization-dependent. Here, we demonstrate compact polarization beam splitters (PBS) LNTF based two asymmetric directional couplers with an effective length of only 180 μm. The PBS is fabricated via a single-step electron lithography (EBL) inductively coupled plasma (ICP) etching...
Abstract Corresponding to the different phase‐shifts of interference modes, whispering gallery mode resonator‐based Fano resonance exhibits a variety unique spectral lineshapes that can be applied sensing, optical signal processing, and so on. However, most approaches lineshape tuning aim alter propagation phase‐shift or coupling strength, generally suffer from relatively low efficiency limited range. In this paper, with carefully designed waveguide‐taper coupled micro‐ring resonator...
Focusing light down to subwavelength scales enhance the light-matter interaction has been highly sought after, which promoted significant researches and applications in nanophotonics. Plasmonic nanoantennae are a tool achieve this goal since they can confine into ultra-small volumes far below diffraction limit. However, metallic materials have property of central symmetry, resulting weak second-order nonlinear effects. Here, we design plasmonic bowtie on thin-film lithium niobate (TFLN) for...
We design and fabricate an unbalanced Mach–Zehnder interferometer (MZI) via electron beam lithography inductively coupled plasma etching on lithium niobate thin film. The single MZI exhibits a maximum extinction ratio of 32.4 dB low extra loss 1.14 at the telecommunication band. Furthermore, tunability by harnessing thermo-optic electro-optic effect is investigated, achieving linear tuning efficiency 42.8 pm/°C 55.2 pm/V, respectively. demonstrated structure has applications for sensing...
With the development of photonic integrated circuits and optical information processing on thin-film lithium niobate (TFLN), realization TFLN-based polarization device is becoming more crucial. Here, we demonstrate a modulator TFLN platform without diversity. Without manipulation elements, only composes phase two-dimensional grating coupler. The structure features small footprint high fabrication tolerance. holds promise for encoding telecommunication.
Polarization controlling devices on thin-film lithium niobate (TFLN) are critical components for photonic integrated circuits (PICs) the platform because birefringence of intrinsically determines its polarization-dependent property. Here, we propose and demonstrate a compact polarization splitter-rotator (PSR) TFLN based two adiabatic tapers an asymmetric directional coupler with effective length only 240 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Periodically poled lithium niobate (LN) waveguides based on quasi-phase matching schemes, benefiting from their high nonlinear coefficient (d
Whispering-gallery-mode (WGM) microresonators can greatly enhance light–matter interaction, making them indispensable units for frequency conversion in nonlinear optics. Efficient wave mixing requires stringent simultaneous optical resonance and phase-matching conditions. Thus, it is challenging to achieve efficient over a broad bandwidth. Here, we demonstrate broadband second-harmonic generation (SHG) the x-cut thin-film lithium niobate (TFLN) microdisk with quality factor above 107 by...
Broadband lasers, e.g., ultrashort optical supercontinuum, and frequency combs, are revolutionary coherent light sources, which enable a plethora of state‐of‐the‐art applications ranging from precision spectroscopy to clocks. However, the spectral broadening these sources mainly relies on third‐order nonlinearity () is difficult extend visible or shorter wavelength regime. Second‐order (), orders magnitude larger than , becomes powerful tool for translation if its broadband operation well...
Integrated photonics provides an important platform for simulating physical models with high-performance chip-scale devices, where the lattice size and time-dependence of a model are key ingredients further enriching functionality photonic chip. Here, we propose demonstrate construction various time-dependent Hamiltonian using single microresonator on thin-film lithium niobate Such integrated holds high quality factor to 10^6, supports synthetic frequency effective sites up 152 under...
Erbium-doped thin-film lithium niobate (Er:TFLN) provides efficient solutions for monolithic integrated waveguide amplifiers and lasers, as well the potential electro-optic modulation nonlinear application. However, gain saturation absorption characteristics usually lack dynamic analysis, which is highly valuable various devices. We provide a practical framework correlating erbium signal wavelength/power in erbium-doped amplifier (EDWA) on Er:TFLN platform, demonstrating performance of...
High-speed polarization management is highly desirable for many applications, such as remote sensing, telecommunication, and medical diagnosis. However, most of the approaches rely on bulky optical components that are slow to respond, cumbersome use, sometimes with high drive voltages. Here, we overcome these limitations by harnessing photonic integrated circuits based thin-film lithium niobate platform. We successfully realize a portfolio devices essential functionalities, including...