Publications (150)
Hybrid-Integrated DFB-Laser-Coupled 1 * 8 Thin-Film Lithium Niobate Modulator Array for High-Speed Parallel Optical Transmitters
Qiyue Hu, Junxia Zhou, Zhe Wang +9
Thin-film lithium niobate (TFLN) electro-optic modulators are attractive for high-speed optical interconnects, but scalable transmitter architectures require not only high modulati…
Mid-infrared-to-ultraviolet supercontinuum generation in low-loss tantalum pentoxide nanophotonic waveguides
Minghui Li, Qiankun Li, Xhizhi Zheng +6
Optical frequency combs on photonic integrated platforms are revolutionizing precision metrology, bio-imaging, atomic and molecular sensing, and ultrafast photonics, yet most remai…
Photonic Neural Network Fabricated on Thin Film Lithium Niobate for High-Fidelity and Power-Efficient Matrix Computation
Yong Zheng, Rongbo Wu, Yuan Ren +5
Photonic neural networks (PNNs) have emerged as a promising platform to address the energy consumption issue that comes with the advancement of artificial intelligence technology,…
On-chip coherent beam combination of waveguide amplifiers on Er-doped thin film lithium niobate
Rui Bao, Lvbin Song, Zhiwei Fang +9
We demonstrate on-chip coherent beam combination of two waveguide amplifiers on Er-doped thin film lithium niobate (Er: TFLN) platform. Our device is built based on an elect…
Impulsive rotational Raman scattering of N2 by a remote "air laser" in femtosecond laser filament
Jielei Ni, Wei Chu, Haisu Zhang +8
We report on experimental realization of impulsive rotational Raman scattering from neutral nitrogen molecules in a femtosecond laser filament using an intense self-induced white-l…
Monolithic low-noise erbium-doped thin-film lithium niobate waveguide amplifier with 18 dB fiber to fiber net gain
Mengqi Li, Jianping Yu, Zhe Wang +5
Erbium-doped waveguide amplifiers have captured great attentions in recent years due to the rapid advance of photonic integration materials and fabrication techniques. In this work…
Spectrally multiplexed and ultrabright entangled photon pairs in a lithium niobate microresonator
Bo-Yu Xu, Li-Kun Chen, Jintian Lin +10
On-chip bright quantum sources with multiplexing ability are extremely high in demand for the integrated quantum networks with unprecedented scalability and complexity. Here, we de…
An electro-optically tunable microring laser monolithically integrated on lithium niobate on insulator
Difeng Yin, Yuan Zhou, Zhaoxiang Liu +9
We demonstrate monolithic integration of an electro-optically (EO) tunable microring laser on lithium niobate on insulator (LNOI) platform. The device is fabricated by photolithogr…
Low-threshold whispering-gallery-mode microlasers fabricated in a Nd: glass substrate by three-dimensional femtosecond laser micromachining
Jintian Lin, Yingxin Xu, Jiangxin Song +6
We report on fabrication of whispering-gallery-mode microlasers in a Nd:glass chip by femtosecond laser three-dimensional (3D) micromachining. Main fabrication procedures include t…
Quasi-monoenergetic Electron Beams from Laser-plasma Acceleration by Ionization-induced Injection in Low- density Pure Nitrogen
Mengze Tao, Nasr A. M. Hafz, Song Li +5
We report a laser wakefield acceleration of electron beams up to 130 MeV from laser-driven 4-mm long nitrogen gas jet. By using a moderate laser intensity (3.5*10^18 W.cm^(-2)) and…
High-production-rate fabrication of low-loss lithium niobate electro-optic modulators using photolithography assisted chemo-mechanical etching (PLACE)
Rongbo Wu, Lang Gao, Youting Liang +7
Integrated thin-film lithium niobate (LN) electro-optic (EO) modulators of broad bandwidth, low insertion loss, low cost and high production rate are essential elements in contempo…
Electronic quantum coherence induced by strong field molecular ionization
Jinming Chen, Jinping Yao, Haisu Zhang +9
The existence of electronic coherence can fundamentally change the scenario of nonlinear interaction of light with quantum systems such as atoms and molecules, which, however, has…
High-precision measurement of a propagation loss of single-mode optical waveguides on lithium niobate on insulator
Jintian Lin, Junxia Zhou, Rongbo Wu +6
We demonstrate fabrication of single-mode optical waveguides on lithium niobate on insulator (LNOI) by optical patterning combined with chemo-mechanical polishing. The fabricated L…
Transverse writing of three-dimensional tubular optical waveguides in glass with slit-shaped femtosecond laser beams
Yang Liao, Jia Qi, Peng Wang +4
We report on fabrication of tubular optical waveguides buried in ZBLAN glass based on transverse femtosecond laser direct writing. Irradiation in ZBLAN with focused femtosecond las…
Signature of superradiance from a nitrogen gas plasma channel produced by strong field ionization
Guihua Li, Chenrui Jing, Bin Zeng +8
Recently, Yao et al. demonstrated the creation of coherent emissions in nitrogen gas with two-color (800 nm + 400 nm) ultrafast laser pulses [New J. Phys. 15, 023046 (2013)]. Based…
Self-induced white-light seeding laser in a femtosecond laser filament
Wei Chu, Guihua Li, Hongqiang Xie +8
We report, for what we believe to be the first time, on the generation of remote self-seeding laser amplification by using only one 800 nm Ti:Sapphire femtosecond laser pulse. The…
Fabrication of polarization-independent waveguides deeply buried in crystal using aberration-corrected femtosecond laser direct writing
Peng Wang, Jia Qi, Zhengming Liu +3
Writing optical waveguides with femtosecond laser pulses provides the capability of forming three-dimensional photonic circuits for manipulating light fields in both linear and non…
Three-dimensional laser printing of macro-scale glass objects at a micro-scale resolution
Peng Wang, Wei Chu, Wenbo Li +9
Three-dimensional (3D) printing has allowed for production of geometrically complex 3D objects with extreme flexibility, which is currently undergoing rapid expansions in terms of…
Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining
Jintian Lin, Yingxin Xu, Zhiwei Fang +5
We report on fabrication of high Q lithium niobate (LN) whispering-gallery-mode (WGM) microresonators suspended on silica pedestals by femtosecond laser microfabrication. The micro…
Low-loss thin-film periodically poled lithium niobate waveguides fabricated by femtosecond laser photolithography
Guanghui Zhao, Jintian Lin, Renhong Gao +10
Periodically poled lithium niobate on insulator (PPLNOI) ridge waveguides are critical photonic components for both classical and quantum information processing. However, dry etchi…
Ultra-high Q lithium niobate microring monolithically fabricated by photolithography assisted chemo-mechanical etching
Chuntao Li, Jianglin Guan, Jintian Lin +5
Thin-film lithium niobate (TFLN) has been considered as one of the most important platforms for constructing high-performance photonic integrated devices such as electro-optic modu…
Harmonic-seeded remote laser emissions in N2-Ar, N2-Xe and N2-Ne mixtures: a comparative study
Jielei Ni, Wei Chu, Haisu Zhang +9
We report on the investigation on harmonic-seeded remote laser emissions at 391 nm wavelength from strong-field ionized nitrogen molecules in three different gas mixtures, i.e., N2…
Real-time spectroscopic monitoring of continuous synthesis of zinc oxide nanostructures in femtosecond laser fabricated 3D microfluidic microchannels with integrated on-chip fiber probe array
Miao Wu, Xin Li, Di-Feng Yin +5
Materials synthesis in a microfluidic environment enables the flexible and controllable production of various types of nanostructures which are of great potential in the fields of…
Electro-optically programmable photonic circuits enabled by wafer-scale integration on thin-film lithium niobate
Yong Zheng, Haozong Zhong, Haisu Zhang +10
Programmable photonic circuits performing universal linear-optical transformations underpin vital functions in photonic quantum information processing, quantum-enhanced sensor netw…
Interferometric characterization of pulse front tilt of spatiotemporally focused femtosecond laser pulses for three-dimensional micromachining application
Zhaohui Wang, Fei He, Jielei Ni +6
We report on an experimental measurement of the pulse front tilt (PFT) of spatiotemporally focused femtosecond laser pulses in the focal plane in both air and bulk transparent mate…
Real-time observation of dynamics in rotational molecular wave packets by use of "air laser" spectroscopy
Bin Zeng, Wei Chu, Guihua Li +6
Molecular rotational spectroscopy based on strong-field-ionization-induced nitrogen laser is employed to investigate the time evolution of the rotational wave packet composed by a…
Ultrafast modulation of the molten metal surface tension under femtosecond laser irradiation
Chenhao Li, Hongtao Liang, Yang Yang +6
We predict ultrafast modulation of the pure molten metal surface stress fields under the irradiation of the single femtosecond laser pulse through the two-temperature model molecul…
High-throughput in-volume processing in glass with isotropic spatial resolutions in three dimensions
Yuanxin Tan, Zhaohui Wang, Wei Chu +3
We report on fabrication of three dimensional (3D) microstructures in glass with isotropic spatial resolutions. To achieve high throughput fabrication, we expand the focal spot siz…
Gain dynamics of a free-space nitrogen laser pumped by circularly polarized femtosecond laser pulses
Jinping Yao, Hongqiang Xie, Bin Zeng +9
We experimentally demonstrate ultrafast dynamic of generation of a strong 337-nm nitrogen laser by injecting an external seed pulse into a femtosecond laser filament pumped by a ci…
On-chip three-dimensional high-Q microcavities fabricated by femtosecond laser direct writing
Jintian Lin, Shangjie Yu, Yaoguang Ma +6
We report on the fabrication of three-dimensional (3D) high-Q whispering gallery microcavities on a fused silica chip by femtosecond laser microfabriction, enabled by the 3D nature…
On-chip single-mode thin film lithium niobate laser based on Sagnac loop reflectors
Shupeng Yu, Zhiwei Fang, Zhe Wang +7
We demonstrate an on-chip single-mode Er3+-doped thin film lithium niobate (Er: TFLN) laser which consists of a Fabry-Pérot (FP) resonator based on Sagnac loop reflectors (SLRs).…
Spatiotemporal focusing does not always improve axial intensity localization
Ya Cheng, Hongqiang Xie, Zhaohui Wang +6
We report on an experimental comparison on critical intensities of nonlinear self-focusing in air with conventional focusing and spatiotemporal focusing schemes. Our results show t…
Ultra-high-speed high-resolution laser lithography for lithium niobate integrated photonics
Jinming Chen, Zhaoxiang Liu, Lvbin Song +3
Photolithography assisted chemo-mechanical etching (PLACE), a technique specifically developed for fabricating highquality large-scale photonic integrated circuits (PICs) on thin-f…
Alignment-dependent fluorescence emission induced by tunnel ionization of carbon dioxide from lower-lying orbitals
Jinping Yao, Guihua Li, Xinyan Jia +13
Study on ionization process of molecules in an intense infrared laser field is of paramount interest in strong-field physics and constitutes the foundation of imaging of molecular…
Second harmonic generation with 48% conversion efficiency from cavity polygon modes in a monocrystalline lithium niobate microdisk resonator
Chao Sun, Jielei Ni, Chuntao Li +10
Thin-film lithium niobate (TFLN) based optical microresonators offer large nonlinear coefficient d_33 and high light-wave confinement, allowing highly efficient second-order optica…
Dual-color Coherent Perfect Absorber
Boyi Xue, Jintian Lin, Jiankun Hou +6
Perfect absorption of light critically affects light-matter interaction for various applications. Coherent perfect absorbers (CPA) gain the unique capability of controlling light w…
Enhanced Frequency Conversion in Parity-Time Symmetry Line
Jiankun Hou, Jiefu Zhu, Ruixin Ma +9
Non-Hermitian degeneracies reveal intriguing and non-trivial behaviors in open physical systems. Examples like Parity-Time (PT) symmetry breaking, topological encircling chirality,…
Multi-mode Perturbation Modelling for Cavity Polygon and Star Modes
Saeed Farajollahi, Zhiwei Fang, Jintian Lin +3
Polygon and star modes enable unidirectional emission and single-frequency lasing in whispering gallery microcavities. To understand their properties and facilitate design, we have…
Compact Ultra-low Loss Optical True Delay Line on Thin Film Lithium Niobate
Yuan Ren, Boyang Nan, Rongbo Wu +5
We report the fabrication of an 8-meter-long thin-film lithium niobate (TFLN) optical true delay line (OTDL) using the photolithography-assisted chemomechanical etching (PLACE) tec…
An Ultrahigh-Q Microresonator on 4H-silicon-carbide-on-insulator Platform for Multiple Harmonics, Cascaded Raman Lasing and Kerr Comb Generations
Chengli Wang, Zhiwei Fang, Ailun Yi +13
The realization of ultrahigh quality (Q) resonators regardless of the underpinning material platforms has been a ceaseless pursuit, because the high Q resonators provide an extreme…
Simultaneous generation of Raman-assisted Soliton Microcombs and Tunable Multi-chromatic Raman Microlasers in Single Monolithic Thin-film Lithium Niobate Microrings
Yingnuo Qiu, Renhong Gao, Chuntao Li +9
High-performance integrated broadband coherent light sources are essential for advanced applications in high-bandwidth data processing and chip-scale metrology, yet remain challeng…
Electro-optically tunable low phase-noise microwave synthesizer in an active lithium niobate microdisk
Renhong Gao, Botao Fu, Ni Yao +7
Photonic-based low-phase-noise microwave generation with real-time frequency tuning is crucial for a broad spectrum of subjects, including next-generation wireless communications,…
Suppression of bend loss in writing of three-dimensional optical waveguides with femtosecond laser pulses
Zhengming Liu, Yang Liao, Zhiwei Fang +2
We provide a solution toward compact and low-loss three dimensional (3D) photonic circuits by femtosecond laser direct writing of 3D waveguides in fused silica. We suppress the ben…
Role of rotational coherence in femtosecond-pulse-driven nitrogen ion lasing
Hongqiang Xie, Hongbin Lei, Guihua Li +7
We experimentally investigated the rotationally resolved polarization characteristics of N lasing at 391 and 428 nm using a pump-seed scheme. By varying the relative angle be…
Transition metals doped CuAlSe2 for promising intermediate band materials
Tingting Wang, Xiaoguang Li, Wenjie Li +5
Introducing an isolated intermediate band (IB) into a wide band gap semiconductor can potentially improve the optical absorption of the material beyond the Shockley-Queisser limita…
Generation of elliptically polarized nitrogen-ion laser fields using two-color femtosecond laser pulses
Ziting Li, Bin Zeng, Wei Chu +6
We experimentally investigate generation of molecular nitrogen-ion lasers with two femtosecond laser pulses at different wavelengths. The first pulse serves as the pump which ioniz…
Fabrication of a microresonator-fiber assembly maintaining a high-quality factor by CO2 laser welding
Zhiwei Fang, Jintian Lin, Min Wang +4
We demonstrate fabrication of a microtoroid resonator of a high-quality (high-Q) factor using femtosecond laser three-dimensional (3D) micromachining. A fiber taper is reliably ass…
Centimeter-scale superfine three-dimensional printing with femtosecond laser two-photon polymerization
Wei Chu, Yuanxin Tan, Peng Wang +4
Nowadays three-dimensional (3D) printing has been widely used for producing geometrically complex 3D structures from a broad range of materials such as ceramics, metals, polymers,…
Stable and scalable multistage terahertz-driven particle accelerator
Heng Tang, Lingrong Zhao, Pengfei Zhu +8
Particle accelerators that use electromagnetic fields to increase a charged particle's energy have greatly advanced the development of science and industry since invention. However…
Subwavelength Photorefractive Grating in a Thin-Film Lithium Niobate Microcavity
Jiankun Hou, Jiefu Zhu, Ruixin Ma +9
Subwavelength gratings play a fundamental and pivotal role in numerous science and applications for wave manipulation, exhibiting distinctive features such as filtering, phase mani…
Backward air lasing actions induced by femtosecond laser filamentation: influence of population inversion lifetime
Hongqiang Xie, Guihua Li, Wei chu +5
We experimentally investigate generation of backward 357 nm N2 laser in a gas mixture of N2/Ar using 800-nm femtosecond laser pulses, and examine the involved gain dynamics based o…
Isotropic fabrication of centimeter-scale, low propagation-loss periodically poled lithium niobate nanophotonic waveguides for efficient second harmonic generation
Guanghui Zhao, Yixuan Yang, Renhong Gao +2
Periodically poled lithium niobate (PPLN) nanophotonic waveguides that simultaneously feature low propagation-loss and uniform periodic poling are essential for a wide range of app…
A high-gain cladded waveguide amplifier on erbium doped thin-film lithium niobate fabricated using photolithography assisted chemo-mechanical etching
Youting Liang, Junxia Zhou, Zhaoxiang Liu +9
Erbium doped integrated waveguide amplifier and laser prevail in power consumption, footprint, stability and scalability over the counterparts in bulk materials, underpinning the l…
A spectrally bright wavelength-switchable vacuum ultraviolet source driven by quantum coherence in strong-field-ionized molecules
Yuexin Wan, Zhaoxiang Liu, Jinping Yao +6
We report generation of spectrally bright vacuum ultraviolet (VUV) and deep UV (DUV) coherent radiations driven by quantum coherence in tunnel-ionized carbon monoxide (CO) molecule…
Formation of in-volume nanogratings with sub-100 nm periods in glass by femtosecond laser irradiation
Yang Liao, Wangjun Pan, Yun Cui +4
We present direct experimental observation of the morphological evolution during the formation of nanogratings with sub-100-nm periods with the increasing number of pulses. Theoret…
2.7-octave supercontinuum generation spanning from ultraviolet to near-infrared in thin-film lithium niobate waveguides
Minghui Li, Qiankun Li, Yongyuan Chu +7
Supercontinuum generation (SCG) with spectral coverage across the full visible and ultraviolet (UV) ranges is crucial for optical clocks, quantum computing and sensing. However, ac…
Scalable native signed optical computing enabled by dual-wavelength incoherent multiplexing
Yuan Ren, Yong Zheng, Ruixue Liu +4
Incoherent photonic neural networks (PNNs) provide a robust platform for analog optical computing, yet efficient implementation of native signed operations remains challenging. Exi…
Fabrication of an integrated high-quality-factor (high-Q) optofluidic sensor by femtosecond laser micromachining
Jiangxin Song, Jintian Lin, Jialei Tang +6
We report on fabrication of a microtoroid resonator of a high-quality factor (i. e., Q-factor of ~3.24x10^6 measured under the critical coupling condition) integrated in a microflu…
An electro-optically tunable arrayed waveguide grating fabricated on thin film lithium niobate
Zhe Wang, 1 Zhiwei Fang, Yiran Zhu +6
We design and fabricate an 8-channel thin film lithium niobate (TFLN) arrayed-waveguide grating (AWG) and demonstrate the electro-optical tunability of the device. The monolithical…
Monolithically integrated waveguide-coupled single-frequency microlaser on erbium-doped thin film lithium niobate
Youting Liang, Junxia Zhou, Rongbo Wu +10
We overcome the difficulty in realizing a monolithic waveguide-coupled microring laser integrated on erbium-doped thin film lithium niobate (Er: TFLN) using photolithography assist…
Wavelength scaling of high-order harmonic yield from an optically prepared excited state atom
Jing Chen, Ya Cheng, Zhizhan Xu
Wavelength scaling law for the yield of high-order harmonic emission is theoretically examined for excited state atoms which are optically prepared by simultaneously exposing to an…
Time-resolved shadowgraphs of transient plasma induced by spatiotemporally focused femtosecond laser pulses in fused silica glass
Zhaohui Wang, Bin Zeng, Guihua Li +7
We report on experimental observations of formation and evolution of transient plasma produced in fused silica glass with spatiotemporally focused (STF) femtosecond laser pulses us…
Population Redistribution among Multiple Electronic States of Molecular Nitrogen Ions in Strong Laser Fields
Jinping Yao, Shicheng Jiang, Wei Chu +11
We carry out a combined theoretical and experimental investigation on the population distributions in the ground and excited states of tunnel ionized N2 molecules at various driver…
On-chip arrayed waveguide grating fabricated on thin film lithium niobate
Zhe Wang, Zhiwei Fang, Zhaoxiang Liu +8
We design an on-chip 8-channel TFLN AWG and fabricate the device using photolithography assisted chemo-mechanical etching (PLACE) technique. We experimentally measure the transmiss…
Sub-cycle coherent control of ionic dynamics via transient ionization injection
Qian Zhang, Hongqiang Xie, Guihua Li +7
We investigate the interwoven dynamic evolutions of neutral nitrogen molecules together with nitrogen ions created through transient tunnel ionization in an intense laser field. By…
Aberration-free three dimensional micromachining in glass with spatiotemporally shaped femtosecond laser pulses
Peng Wang, Wei Chu, Wenbo Li +5
We observe that focusing a femtosecond laser beam simultaneously chirped in time and space domains in glass can efficiently suppress the optical aberration caused by the refractive…
Integrated electro-optically tunable narrow-linewidth III-V laser
Yiran Zhu, Shupeng Yu, Zhiwei Fang +8
We demonstrate an integrated electro-optically tunable narrow-linewidth III-V laser with an output power of 738.8 μW and an intrinsic linewidth of 45.55 kHz at the C band. The las…
Reconstruction of a Rotational Wavepacket of Inverted Molecular Ions in an Intense Femtosecond Laser Field
Haisu Zhang, Chenrui Jing, Jinping Yao +10
We report on generation of a rotational wavepacket in the ground vibronic state (v = 0) of excited electronic B2Σu+ state of N2+ in a femtosecond laser induced plasma spark. Decod…
Signature of multi-channel interference in high-order harmonic generation from N2 driven by intense mid-infrared pulses
Guihua Li, Jinping Yao, Xinhua Xie +10
We investigate the multi-electron dynamics in high-order harmonic generation (HHG) from N2 molecules. Clear spectral minima are observed in the cutoff region at all three mid-infra…
Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air
Jiayu Zhao, Wei Chu, Lanjun Guo +4
Terahertz (THz) imaging provides cutting edge technique in biology, medical sciences and non-destructive evaluation. However, due to the long wavelength of the THz wave, the obtain…
Single-Shot Single-Beam Coherent Raman Scattering Thermometry Based on Air Lasing
Xu Lu, Yewei Chen, Francesco Mazza +9
Thermometric techniques with high accuracy, fast response speed and ease of implementation are desirable for the study of dynamic combustion environments, transient reacting flows,…
Highly-efficient second and third harmonic generation in a monocrystalline lithium niobate microresonator
Jintian Lin, Yao Ni, Zhenzhong Hao +10
Nonlinear optics in whispering-gallery-mode (WGM) microresonators have attracted much attention. Owing to strong confinement of the light in a small volume, a WGM microresonator ca…
An on-chip tunable micro-disk laser fabricated on Er3+ doped lithium niobate on insulator (LNOI)
Zhe Wang, Zhiwei Fang, Zhaoxiang Liu +7
We demonstrate a C-band wavelength-tunable microlaser with an Er3+ doped high quality (~1.02x10^6) lithium niobate microdisk resonator. With a 976 nm continuous-wave pump laser, la…
On-chip integrated Yb3+-doped waveguide amplifiers on thin film lithium niobate
Zhihao Zhang, Zhiwei Fang, Junxia Zhou +10
We report the fabrication and optical characterization of Yb3+-doped waveguide amplifiers (YDWA) on the thin film lithium niobate fabricated by photolithography assisted chemo-mech…
High-index-contrast single-mode optical waveguides fabricated on lithium niobate by photolithography assisted chemo-mechanical etching (PLACE)
Jianhao Zhang, Rongbo Wu, Min Wang +7
We report fabrication of low loss single mode waveguides on lithium niobate on insulator (LNOI) cladded by a layer of SiO2. Our technique, termed photolithography assisted chemo-me…
Generation of bright laser-like coherent emissions from nitrogen molecular ions in intense infrared laser fields: A unique quantum system for extreme nonlinear optics
Jinping Yao, Wei Chu, Zhaoxiang Liu +3
We report on an investigation of simultaneous generation of several narrow-bandwidth laser-like coherent emissions from nitrogen molecular ions ( ) produced in intense mid-infrared…
Terahertz Wave Guiding by Femtosecond Laser Filament in Air
Jiayu Zhao, Yizhu Zhang, Zhi Wang +5
Femtosecond laser filament generates strong terahertz (THz) pulse in air. In this paper, THz pulse waveform generated by femtosecond laser filament has been experimentally investig…
Thin Film Lithium Niobate Electro-optic Isolator Fabricated by photolithography assisted chemo-mechanical etching (PLACE)
Lang Gao, Youting Liang, Lvbin Song +10
We report a thin-film lithium niobate electro-optic isolator fabricated by photolithography-assisted chemo-mechanical etching in this work. The device demonstrates 39.50 dB isolati…
High-brightness switchable multi-wavelength remote laser in air
Jinping Yao, Bin Zeng, Huailiang Xu +7
Remote laser in air based on amplified spontaneous emission (ASE) has produced rather well-collimated coherent beams in both backward and forward propagation directions, opening up…
An erbium-doped waveguide amplifier on thin film lithium niobate with an output power exceeding 100 mW
Rui Bao, Zhiwei Fang, Jian Liu +6
We demonstrate high-power thin film lithium niobate (TFLN) erbium-doped waveguide amplifier (EDWA) with a maximum on-chip output power of 113 mW and a gain of 16 dB. The on-chip in…
Low-loss Lithium Niobate on Insulator (LNOI) Waveguides of a 10 cm-length and a Sub-nanometer Surface Roughness
Rongbo Wu, Min Wang, Jian Xu +9
We develop a technique for realizing lithium niobate on insulator (LNOI) waveguides of a multi-centimeter-length with a propagation loss as low as 0.027 dB/cm. Our technique relies…
On-chip tuning of the resonant wavelength in a high-Q microresonator integrated with a microheater
Jialei Tang, Jintian Lin, Jiangxin Song +5
We report on fabrication of a microtoroid resonator of high-quality (high-Q) factor integrated with an on-chip microheater. Both the microresonator and microheater are fabricated u…
A compact and efficient three-dimensional microfluidic mixer
Wenbo Li, Wei Chu, Peng Wang +5
Microfluidic mixing is a fundamental functionality in most lab on a chip (LOC) systems,whereas realization of efficient mixing is challenging in microfluidic channels due to the sm…
Ultrafast laser-induced subwavelength structures towards nanoscale: the significant role of plasmonic effects
Min Huang, Ya Cheng, Fuli Zhao +1
Nowadays, via controlling surface plasmons (SPs) on elaborate man-made structures, plasmonics aiming at manipulating light beyond the diffraction limit has aroused great interest.…
Phase matched second harmonic generation in an on-chip lithium niobate microresonator fabricated by femtosecond laser
Jintian Lin, Yingxin Xu, Jielei Ni +5
Nonlinear optical processes in whispering gallery mode (WGM) microresonators have attracted much attention. Owing to the strong confinement of light in a small volume, a WGM micror…
Erbium-ytterbium co-doped lithium niobate single-mode microdisk laser with an ultralow threshold of 1 uW
Minghui Li, Renhong Gao, Chuntao Li +9
We demonstrate single-mode microdisk lasers in the telecom band with ultra-low thresholds on erbium-ytterbium co-doped thin-film lithium niobate (TFLN). The active microdisk were f…
Freeform microfluidic networks encapsulated in laser printed three-dimensional macro-scale glass objects
Zijie Lin, Jian Xu, Yunpeng Song +5
Large-scale microfluidic microsystems with complex three-dimensional (3D) configurations are highly in demand by both fundamental research and industrial application, holding the p…
Simultaneous generation of four-wave mixing and stimulated Raman scattering in coupled lithium niobate microdisks mediated by second harmonic generation
Min Wang, Ni Yao, Rongbo Wu +7
High quality lithium niobate thin film microresonators provide an ideal platform for on-chip nonlinear optics applications. However, the phase matching condition for efficient para…
Photon retention in coherently excited nitrogen ions
Jinping Yao, Luojia Wang, Jinming Chen +12
Quantum coherence in quantum optics is an essential part of optical information processing and light manipulation. Alkali metal vapors, despite the numerous shortcomings, are tradi…
Monolithically integrated active passive waveguide array fabricated on thin film lithium niobate using a single continuous photolithography process
Yuan Zhou, Yiran Zhu, Zhiwei Fang +13
We demonstrate a robust low-loss optical interface by tiling passive (i.e., without doping of active ions) thin film lithium niobate (TFLN) and active (i.e., doped with rare earth…
Efficient light coupling between an ultra-low loss lithium niobate waveguide and an adiabatically tapered single mode optical fiber
Ni Yao, Junxia Zhou, Renhong Gao +5
A lithium niobate on insulator ridge waveguide allows constructing high-density photonic integrated circuits thanks to its small bending radius offered by the high index contrast.…
Real-time Electrical Tuning of an Optical Spring on a Monolithically Integrated Ultrahigh Q Lithium Nibote Microresonator
Zhiwei Fang, Sanaul Haque, Jintian Lin +7
Cavity optomechanics, the study of the interplay between light and mechanical properties of matter, has triggered a wide range of groundbreaking researches from cavity quantum elec…
Harmonic-seeded resonant Raman amplification in strong-field ionized nitrogen molecules
Jinping Yao, Wei Chu, Chuanshan Tian +3
Generation of free-space laser-like emissions of high spatiotemporal coherence and narrow bandwidth in atmosphere opens promising opportunities for remote spectroscopic sensing. He…
On-chip multi-color microdisk laser on Yb3+-doped thin-film lithium niobate
Yuan Zhou, Zhe Wang, Zhiwei Fang +12
We demonstrate an on-chip Yb3+-doped lithium niobate (LN) microdisk laser. The intrinsic quality factors of the fabricated Yb3+-doped LN microdisk resonator are measured up to 3.79…
Fabrication of polarization-independent single-mode waveguides in lithium niobate crystal with femtosecond laser pulses
Jia Qi, Peng Wang, Yang Liao +5
We report on fabrication of depressed cladding optical waveguides buried in lithium niobate crystal with shaped femtosecond laser pulses. Depressed cladding waveguides of variable…
Second harmonic generation in a centrosymmetric gas medium with spatiotemporally focused intense femtosecond laser pulses
Guihua Li, Jielei Ni, Hongqiang Xie +9
We demonstrate unexpectedly strong second harmonic generation (SHG) in Argon gas by use of spatiotemporally focused (SF) femtosecond laser pulses. The resulting SHG by the SF schem…
Monolithically integrated high-power narrow-bandwidth microdisk laser
Jianglin Guan, Chuntao Li, Renhong Gao +7
Integrated on-chip microdisk lasers have attracted great attention as a light source of compact size, low lasing threshold and narrow bandwidth. However, challenges remain unresolv…
Integration of an optical fiber taper with an optical microresonator fabricated in glass by femtosecond laser 3D micromachining
Jiangxin Song, Jintian Lin, Jialei Tang +2
We report on fabrication of a microtoroid resonator of a high-quality factor (i. e., Q-factor of ~3.24x10^6 measured under the critical coupling condition) using femtosecond laser…
Near-Zero Crosstalk and Ultra-Low Loss Waveguide Crossings Enabled by three-dimensional Ta2O5-on-LNOI Integrated Photonic Platform
Boyang Nan, Yuan Ren, Rongbo Wu +5
Waveguide crossings represent one of the most critical components in very-large-scale photonic integration (VLSPI). Three-dimensional waveguide crossings, which distribute optical…
Integrated multi-color Raman microlasers with ultra-low pump levels in single high-Q lithium niobate microdisks
Guanghui Zhao, Jintian Lin, Botao Fu +8
Photonic integrated Raman microlasers, particularly discrete multi-color lasers which are crucial for extending the emission wavelength range of chip-scale laser sources to much sh…