Publications (47)
Observation of Floquet Chern insulators of light
Jicheng Jin, Li He, Jian Lu +5
The field of topological photonics studies unique and robust photonic systems that are immune to defects and disorders due to the protection of their underlying topological phases.…
Integrated turnkey soliton microcombs operated at CMOS frequencies
Boqiang Shen, Lin Chang, Junqiu Liu +14
While soliton microcombs offer the potential for integration of powerful frequency metrology and precision spectroscopy systems, their operation requires complex startup and feedba…
On-chip polarization rotator for type I second harmonic generation
Eric J. Stanton, Lin Chang, Weiqiang Xie +12
We demonstrate a polarization rotator integrated at the output of a GaAs waveguide producing type I second harmonic generation (SHG). Form-birefringent phase matching between the p…
Chip-Based Laser with 1 Hertz Integrated Linewidth
Joel Guo, Charles A. McLemore, Chao Xiang +14
Lasers with hertz-level linewidths on timescales up to seconds are critical for precision metrology, timekeeping, and manipulation of quantum systems. Such frequency stability typi…
Communication-ready high-power soliton microcombs in highly-dispersive Fabry-Perot-microresonators
Yinke Cheng, Zhenyu Xie, Yuanlei Wang +9
Microcombs generated in optical microresonators are widely regarded as promising light sources for next-generation communication systems, but the optical power available per comb l…
Convergence rate toward shock wave under periodic perturbation for generalized Korteweg-de Vries-Burgers equation
Lin Chang
In this paper, a viscous shock wave under space-periodic perturbation of generalized Korteweg-de Vries-Burgers equation is investigated. It is shown that if the initial periodic pe…
Pockels Laser Directly Driving Ultrafast Optical Metrology
Shixin Xue, Mingxiao Li, Raymond Lopez-rios +10
The invention of the laser unleashed the potential of optical metrology, leading to numerous advancements in modern science and technology. This reliance on lasers, however, also s…
Laser soliton microcombs on silicon
Chao Xiang, Junqiu Liu, Joel Guo +10
Silicon photonics enables wafer-scale integration of optical functionalities on chip. A silicon-based laser frequency combs could significantly expand the applications of silicon p…
Probing material absorption and optical nonlinearity of integrated photonic materials
Maodong Gao, Qi-Fan Yang, Qing-Xin Ji +12
Optical microresonators with high quality () factors are essential to a wide range of integrated photonic devices. Steady efforts have been directed towards increasing microreso…
Stability of a Composite Wave of Two Seperate Strong Viscous Shock Waves for 1-D Isentropic Navier-Stokes System
Lin Chang
In this paper, the large time behavior of solutions of 1-D isentropic Navier-Stokes system is investigated. It is shown that a composite wave consisting of two viscous shock waves…
Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high- microresonators
Warren Jin, Qi-Fan Yang, Lin Chang +8
Driven by narrow-linewidth bench-top lasers, coherent optical systems spanning optical communications, metrology and sensing provide unrivalled performance. To transfer these capab…
Recursive Inverse Design Enables Hyper-spectral Photonic Integrated Circuits
Hao He, Zengji Tu, Yuanlei Wang +9
Spectrum manipulation is central to photonic systems, where advanced computing and sensing applications often demand highly complex spectral responses to achieve high throughput. C…
An End-to-End Cascaded Image Deraining and Object Detection Neural Network
Kaige Wang, Tianming Wang, Jianchuang Qu +3
While the deep learning-based image deraining methods have made great progress in recent years, there are two major shortcomings in their application in real-world situations. Firs…
Self-injection-locked second-harmonic integrated source
Jingwei Ling, Jeremy Staffa, Heming Wang +12
High coherence visible and near-visible laser sources are centrally important to the operation of advanced position/navigation/timing systems as well as classical/quantum sensing s…
Nonlinear stability of planar shock wave to 3-D compressible Navier-Stokes equations in half space with Navier Boundary conditions
Lin Chang, Lingjun Liu, Lingda Xu
In this paper, we consider the large time behavior of planar shock wave for 3-D compressible isentropic Navier-Stokes equations (CNS) in half space. Providing the strength of the s…
Fully on-chip microwave photonics system
Yuansheng Tao, Fenghe Yang, Zihan Tao +6
Microwave photonics (MWP), harnessing the tremendous bandwidth of light to generate, process and measure wideband microwave signals, are poised to spark a new revolution for the in…
Quasi-phase-matched supercontinuum-generation in photonic waveguides
Daniel D. Hickstein, Grace C. Kerber, David R. Carlson +7
Supercontinuum generation in integrated photonic waveguides is a versatile source of broadband light, and the generated spectrum is largely determined by the phase-matching conditi…
High-performance lasers for fully integrated silicon nitride photonics
Chao Xiang, Joel Guo, Warren Jin +12
Silicon nitride (SiN) waveguides with ultra-low optical loss enable integrated photonic applications including low noise, narrow linewidth lasers, chip-scale nonlinear photonics, a…
Image Deraining and Denoising Convolutional Neural Network ForAutonomous Driving
Kaige Wang, Long Chen, TIanming Wang +3
Perception plays an important role in reliable decision-making for autonomous vehicles. Over the last ten years, huge advances have been made in the field of perception. However, p…
Ultraprecise optical-frequency stabilization with heterogeneous III-V/Si lasers
Liron Stern, Wei Zhang, Lin Chang +8
Demand for low-noise, continuous-wave, frequency-tunable lasers based on semiconductor integrated photonics has been advancing in support of numerous applications. In particular, a…
Efficient second harmonic generation in nanophotonic GaAs-on-insulator waveguides
Eric J. Stanton, Jeff Chiles, Nima Nader +6
Nonlinear frequency conversion plays a crucial role in advancing the functionality of next-generation optical systems. Portable metrology references and quantum networks will deman…
Correlated self-heterodyne method for ultra-low-noise laser linewidth measurements
Zhiquan Yuan, Heming Wang, Peng Liu +9
Narrow-linewidth lasers are important to many applications spanning precision metrology to sensing systems. Characterization of these lasers requires precise measurements of their…
Ultrahigh-Q AlGaAs-on-insulator microresonators for integrated nonlinear photonics
Weiqiang Xie, Lin Chang, Haowen Shu +4
Aluminum gallium arsenide (AlGaAs) and related III-V semiconductors have excellent optoelectronic properties. They also possess strong material nonlinearity as well as high refract…
Expanding the Quantum Photonic Toolbox in AlGaAsOI
Joshua E. Castro, Trevor J. Steiner, Lillian Thiel +6
Aluminum gallium arsenide-on-insulator (AlGaAsOI) exhibits large $Ï^\left(2\right)$ and $Ï^\left(3\right)$ optical nonlinearities, a wide tunable bandgap, low waveguide propagati…
Sub-milliwatt, widely-tunable coherent microcomb generation with feedback-free operation
Haowen Shu, Lin Chang, Chenghao Lao +11
Microcombs are revolutionizing optoelectronics by providing parallelized, mutually coherent wavelength channels for time-frequency metrology and information processing. To implemen…
Hybrid InP and SiN integration of an octave-spanning frequency comb
Travis C. Briles, Su-Peng Yu, Lin Chang +7
Implementing optical-frequency combs with integrated photonics will enable wider use of precision timing signals.Here, we explore the generation of an octave-span, Kerr-microresona…
Roadmap on Integrated Quantum Photonics
Galan Moody, Volker J. Sorger, Daniel J. Blumenthal +52
Integrated photonics is at the heart of many classical technologies, from optical communications to biosensors, LIDAR, and data center fiber interconnects. There is strong evidence…
Dissipative Kerr Solitons in a III-V Microresonator
Gregory Moille, Lin Chang, Weiqiang Xie +5
We demonstrate stable microresonator Kerr soliton frequency combs in a III-V platform (AlGaAs on SiO) through quenching of thermorefractive effects by cryogenic cooling to temp…
Integrated Passive Nonlinear Optical Isolators
Alexander D. White, Geun Ho Ahn, Kasper Van Gasse +4
Fiber and bulk-optical isolators are widely used to stabilize laser cavities by preventing unwanted feedback. However, their integrated counterparts have been slow to be adopted. W…
Improved second harmonic performance in periodically poled LNOI waveguides through engineering of lateral leakage
Andreas Boes, Lin Chang, Markus Knoerzer +4
In this contribution we investigate the impact of lateral leakage for linear and nonlinear optical waveguides in lithium niobate on insulator (LNOI). Silicon nitride (SiN) loaded a…
Extending the spectrum of fully integrated photonics
Minh Tran, Chong Zhang, Theodore Morin +15
Integrated photonics has profoundly impacted a wide range of technologies underpinning modern society. The ability to fabricate a complete optical system on a chip offers unrivalle…
Platicon microcomb generation using laser self-injection locking
Grigory Lihachev, Junqiu Liu, Wenle Weng +7
The past decade has witnessed major advances in the development of microresonator-based frequency combs (microcombs) that are broadband optical frequency combs with repetition rate…
Stability of Large Amplitude Viscous Shock Wave for 1-D Isentropic Navier-Stokes System in the Half Space
Lin Chang
In this paper, the asymptotic-time behavior of solutions to an initial boundary value problem in the half space for 1-D isentropic Navier-Stokes system is investigated. It is shown…
Ultra-bright entangled-photon pair generation from an AlGaAs-on-insulator microring resonator
Trevor J. Steiner, Joshua E. Castro, Lin Chang +5
Entangled-photon pairs are an essential resource for quantum information technologies. Chip-scale sources of entangled pairs have been integrated with various photonic platforms, i…
High-coherence parallelization in integrated photonics
Xuguang Zhang, Zixuan Zhou, Yijun Guo +19
Coherent optics has profoundly impacted diverse applications ranging from communications, LiDAR to quantum computations. However, building coherent systems in integrated photonics…
Stability of strong viscous shock wave under periodic perturbation for 1-D isentropic Navier-Stokes system in the half space
Lin Chang, Lin He, Jin Ma
In this paper, a viscous shock wave under space-periodic perturbation of 1-D isentropic Navier-Stokes system in the half space is investigated. It is shown that if the initial peri…
Holographic Surface Enabled Integrated Sensing and Communications
Haobo Zhang, Shuhao Zeng, Xinyuan Hu +12
Integrated sensing and communications (ISAC) is an essential 6G capability for joint data transmission and environmental sensing. To support 6G scenarios with stringent ISAC perfor…
Ultra-efficient frequency comb generation in AlGaAs-on-insulator microresonators
Lin Chang, Weiqiang Xie, Haowen Shu +13
Recent advances in nonlinear optics have revolutionized the area of integrated photonics, providing on-chip solutions to a wide range of new applications. Currently, the state of t…
Integrated Pockels Laser
Mingxiao Li, Lin Chang, Lue Wu +14
The development of integrated semiconductor lasers has miniaturized traditional bulky laser systems, enabling a wide range of photonic applications. A progression from pure III-V b…
Unified laser stabilization and isolation on a silicon chip
Alexander D. White, Geun Ho Ahn, Richard Luhtaru +8
Rapid progress in photonics has led to an explosion of integrated devices that promise to deliver the same performance as table-top technology at the nanoscale; heralding the next…
Bridging microcombs and silicon photonic engines for optoelectronics systems
Haowen Shu, Lin Chang, Yuansheng Tao +12
Microcombs have sparked a surge of applications over the last decade, ranging from optical communications to metrology. Despite their diverse deployment, most microcomb-based syste…
Heterogeneously integrated GaAs waveguides on insulator for efficient frequency conversion
Lin Chang, Andreas Boes, Xiaowen Guo +12
Tremendous scientific progress has been achieved through the development of nonlinear integrated photonics. Prominent examples are Kerr-frequency-comb generation in micro-resonator…
Self-regulating soliton domain walls in microresonators
Heming Wang, Boqiang Shen, Yan Yu +9
Dissipative soliton Kerr frequency combs in microresonators have recently been demonstrated with the self-injection locking process. They have the advantage of turnkey deterministi…
An Integrated-Photonics Optical-Frequency Synthesizer
Daryl T. Spencer, Tara Drake, Travis C. Briles +24
Integrated-photonics microchips now enable a range of advanced functionalities for high-coherence applications such as data transmission, highly optimized physical sensors, and har…
Microresonator-referenced soliton microcombs with zeptosecond-level timing noise
Xing Jin, Zhenyu Xie, Xiangpeng Zhang +6
Optical frequency division relies on optical frequency combs to coherently translate ultra-stable optical frequency references to the microwave domain. This technology has enabled…
Inverse-designed multi-dimensional silicon photonic transmitters
Ki Youl Yang, Alexander D. White, Farshid Ashtiani +33
Modern microelectronic processors have migrated towards parallel computing architectures with many-core processors. However, such expansion comes with diminishing returns exacted b…
Soliton generation in AlGaAs microresonators at room temperature
Lue Wu, Weiqiang Xie, Chao Xiang +7
Chip-integrated optical frequency combs are attractive optical sources in comb applications requiring high-repetition-rate, low power consumption, or compact size. Spontaneous soli…