A5044517310- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Semiconductor Lasers and Optical Devices
- Laser-Matter Interactions and Applications
- Neural Networks and Reservoir Computing
- Quantum Information and Cryptography
- Solid State Laser Technologies
- Quantum optics and atomic interactions
- Photonic Crystals and Applications
- Photonic Crystal and Fiber Optics
- Microwave Engineering and Waveguides
- Cancer Treatment and Pharmacology
- Photorefractive and Nonlinear Optics
- Electromagnetic Simulation and Numerical Methods
- Gyrotron and Vacuum Electronics Research
- Quantum Mechanics and Applications
- Laser Design and Applications
- Nonlinear Photonic Systems
- Advancements in Photolithography Techniques
- Semiconductor Quantum Structures and Devices
- Quantum Computing Algorithms and Architecture
City University of Hong Kong
2016-2025
Harbin Engineering University
2024-2025
Zhejiang University of Technology
2024-2025
Zhejiang Water Conservancy and Hydropower Survey and Design Institute
2024
Ministry of Industry and Information Technology
2024
Xi'an Institute of Optics and Precision Mechanics
2017-2022
University of Hong Kong
2013-2022
HKU-Pasteur Research Pole
2022
University of Electronic Science and Technology of China
2016-2021
Monash University
2021
Microring resonators side coupled to signal waveguides provide compact, narrow band, and large free spectral range optical channel dropping filters. Higher order filters with improved passband characteristics larger out-of-band rejection are realized through the coupling of multiple rings. The analysis these devices is approached by novel method modes in time. response comprised an arbitrarily dumber may be written down inspection, as a continued fraction. This approach simplifies both...
Entangled frequency combs The ability to generate optical in which the output light is made up of millions sharp lines precisely spaced apart has been important for applications and fundamental science. Reimer et al. now show that can be taken into quantum regime. They took individual teeth quantum-mechanically entangled them form complex states. Because method compatible with existing fiber semiconductor technology, results demonstrate a possible scalable practical platform technologies....
High-order microring resonators having from 1 to 11 coupled cavities are demonstrated. These filters exhibit low loss, flat tops, and out-of-band rejection ratios that can exceed 80 dB. They achieve performance is suitable for commercial applications.
Over the past decade, optical frequency combs generated by high-Q microresonators, or microcombs, which feature compact device footprints, low power consumption, and high repetition rates in broad bandwidths, have led to a revolution wide range of fields including metrology, telecommunications, radio (RF) photonics, spectroscopy, sensing, quantum optics. Among these, an application that has attracted great interest is use microcombs for RF where they offer enhanced functionalities as well...
Compact optical channel dropping filters incorporating side-coupled ring resonators as small 3 μm in radius are realized silicon technology. Quality factors up to 250, and a free-spectral range (FSR) large 24 nm measured. Such structures can be used fundamental building blocks more sophisticated signal processing devices.
One reason for using photonic devices is their speed—much faster than electronic circuits—but there are many challenges in integrating the two technologies. Ferreraet al. construct a CMOS-compatible monolithic optical waveform integrator, key building block circuits. All-optical circuits computing and information processing could overcome speed limitations intrinsic to electronics. However, photonics, very few fundamental 'building blocks' equivalent those used multi-functional exist. In...
We demonstrate advanced transversal radio frequency (RF) and microwave functions based on a Kerr optical comb source generated by an integrated micro-ring resonator. achieve extremely high performance for true time delay aimed at tunable phased array antenna applications, as well reconfigurable photonic filters. Our results agree with theory. show that our would yield features include angular resolution wide range of beam steering angles, while the filters feature Q factors, wideband...
We report a broadband RF channelizer based on an integrated optical frequency Kerr micro-comb source, with channelizing bandwidth of 90 GHz, high spectral slice resolution 1.04 and experimentally verify the performance up to 19 GHz. This approach realizing channelizers offers reduced complexity, size, potential cost for wide range applications microwave signal detection.
We propose and experimentally demonstrate a microwave photonic intensity differentiator based on Kerr optical comb generated by compact integrated micro-ring resonator (MRR). The on-chip comb, containing large number of lines, serves as high-performance multi-wavelength source for implementing transversal filter, which will greatly reduce the cost, size, complexity system. Moreover, owing to compactness MRR, frequency spacings up 200-GHz can be achieved, enabling potential operation...
We demonstrate a photonic radio frequency (RF) transversal filter based on an integrated optical micro-comb source featuring record low free spectral range of 49 GHz yielding 80 lines across the C-band. This record-high number taps, or wavelengths for results in significantly increased performance including QRF factor more than four times higher previous results. Further, by employing both positive and negative improved out-of-band rejection up to 48.9 dB is demonstrated using Gaussian...
We demonstrate high-resolution photonic RF filters using an bandwidth scaling approach based on integrated Kerr optical micro-combs. By employing both active nonlinear micro-ring resonator (MRR) as a high-quality micro-comb source and passive high-Q MRR to slice the spectra modulated shaped comb, large instantaneous of 4.64 GHz high resolution 117 MHz are achieved, together with broad operation band covering 3.28–19.4 (L Ku bands) thermal tuning. achieve programmable transfer functions...
We demonstrate a photonic RF Hilbert transformer for broadband microwave in-phase and quadrature-phase generation based on an integrated frequency optical comb, generated using nonlinear microring resonator CMOS compatible, high-index contrast, doped-silica glass platform.The high quality large spacing of the comb enables filters with up to 20 taps, allowing us quadrature filter more than 5-octave (3 dB) bandwidth almost uniform phase response.
We report a novel geometry for OPOs based on nonlinear microcavity resonators. This approach relies self-locked scheme that enables OPO emission without the need thermal locking of pump laser to resonance. By exploiting CMOS-compatible microring resonator, we achieve oscillation with complete absence shutting down, or self-terminating behavior, very common occurrence in externally pumped OPOs. Further, this consistently produces wide bandwidth (>300nm, limited by our experimental set-up)...
Photonic integrated circuits (PICs) capable of ultra-fast, signal processing are recognized as being fundamental for future applications involving ultra-short optical pulse propagation, including the ability to meet exponentially growing global fiber-optic telecommunications bandwidth demand. Integrated all-optical processors would carry substantial benefits in terms performance, cost, footprint, and energy efficiency. Here, we demonstrate an compressor based on nonlinear chirper, operating...
We report an integrated photon pair source based on a CMOScompatible microring resonator that generates multiple, simultaneous, and independent pairs at different wavelengths in frequency comb compatible with fiber communication wavelength division multiplexing channels (200 GHz channel separation) linewidth is quantum memories (110 MHz).It operates self-locked pump configuration, avoiding the need for active stabilization, making it extremely robust even very low power levels.
We demonstrate supercontinuum (SC) generation at both 1550 nm and 1288 in a compact (< 5mm(2)) 45 cm spiral waveguide composed of CMOS-compatible doped high-index glass. While wavelengths have weak dispersion are near zero points, they present different symmetries. At nm, the normal regime takes place longer wavelengths, whereas 1290 it is shorter we observe features SC spectra that clearly reflect this. In particular, spectrum more than 300 wide (limited by detection) well reproduced...
We demonstrate a novel mode locked ultrafast laser, based on an integrated high-Q micr-oring resonator. Our scheme exhibits stable operation of two slightly shifted spectral optical comb replicas. It generates highly monochromatic radiofrequency modulation 60MHz 200GHz output pulse train, with linewidth < 10kHz