A5080029184- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Photonic Crystal and Fiber Optics
- Cancer Treatment and Pharmacology
- Analytical chemistry methods development
- Advanced Measurement and Metrology Techniques
- Advanced biosensing and bioanalysis techniques
- Photochromic and Fluorescence Chemistry
- Biosensors and Analytical Detection
- Gyrotron and Vacuum Electronics Research
- Porphyrin and Phthalocyanine Chemistry
- Spectroscopy and Laser Applications
- Nonlinear Photonic Systems
- Supramolecular Self-Assembly in Materials
University of California, Los Angeles
2016-2025
Wuhan Institute of Technology
2024
Hubei University
2024
Fuzhou University
2023
Laser interferometry serves a fundamental role in science and technology, assisting precision metrology dimensional length measurement. During the past decade, laser frequency combs - coherent optical-microwave ruler over broad spectral range with traceability to time-frequency standards have contributed pivotal roles ever-growing demands measurement precision. Here we report spectrally-resolved via soliton microcomb, nanometric-scale Spectral provides information on optical time-of-flight...
High-Q microresonator is perceived as a promising platform for optical frequency comb generation, via dissipative soliton formation. In order to achieve higher quality factor and obtain the necessary anomalous dispersion, multi-mode waveguides were previously implemented in Si3N4 microresonators. However, coupling between different transverse mode families results periodic disruption of dispersion factor, consequently causes perturbation formation amplitude modulation corresponding spectrum....
Abstract Femtosecond mode-locked laser frequency combs have served as the cornerstone in precision spectroscopy, all-optical atomic clocks, and measurements of ultrafast dynamics. Recently microcombs based on nonlinear microresonators been examined, exhibiting remarkable approaching that combs, a solid-state chip-scale platform from fundamentally different physical origin. Despite recent successes, to date, real-time dynamical origins high-power stabilities such not fully addressed. Here, we...
Dissipative Kerr soliton generation in chip-scale nonlinear resonators has recently observed remarkable advances, spanning from massively parallel communications, to self-referenced oscillators, and dual-comb spectroscopy. Often working the anomalous dispersion regime, unique driving protocols these have been examined achieve soliton-like temporal pulse shapes coherent frequency comb generation. The normal regime provides a complementary approach bridge dynamical studies, including...
A compact all-in-line graphene-based distributed feedback Bragg-grating fiber laser (GDFB-FL) with narrow linewidth of hundreds kHz is demonstrated and investigated in this study. Performing as an optical saturable absorber, graphene oscillates the initially DFB-FL, generates high-quality passively Q-switched pulses. Pumped a 980 nm continuous-wave laser, GDFB-FL observes ~1 μs pulse durations, energies up to ~10 nJ approaching transform limit. The peak power ~600 times higher than original...
Abstract High-spectral-purity frequency-agile room-temperature sources in the terahertz spectrum are foundational elements for imaging, sensing, metrology, and communications. Here we present a chip-scale optical parametric oscillator based on an integrated nonlinear microresonator that provides broadly tunable single-frequency multi-frequency oscillators regime. Through optical-to-terahertz down-conversion using plasmonic nanoantenna array, coherent radiation spanning 2.8-octaves is...
Dissipative Kerr solitons (DKSs) in microresonators have boosted the development of chip-scale ultrastable microcomb sources, and thrived both fundamental physics a wide range applications. Among various DKS states, single DKS, double perfect soliton crystal could be identified simply based on optical spectrum. Especially, state, due to its two-pulse-interference nature, has recently found own application microwave photonics, such as reconfigurable rf filters. However, traditional method...
Formation of the Kerr soliton combs is a widely recognized important but complex issue, which relates to cross-influences among intra-cavity nonlinearities, chromatic dispersions, mode interactions, and pumping effects. Here, we propose demonstrate deep neural network model predict comb spectra in silica microspheres statistically, via training their transmission spectra. Such scheme enables identification under particular pump scanning, with error <; 8%, verified by experimental...
We report a novel way to generate frequency comb in normal GVD microresonator. By using single FSR intensity-modulated pump, we successfully observe mode locked and bright square pulse for the first time.
Unlike traditional methods of modifying phthalocyanines (Pcs), we herein report a smart and visible way to switch the aromaticity silicon(IV) via reversible nucleophilic addition reaction Pc skeleton induced by alkalis acids, leading an interesting allochroism phenomenon switching photosensitive activities.
We present the intensity noise and comb line linewidth in optical frequency microcombs. The measured short-term linewidths are -153 dB/Hz at 100 kHz offset 3.5 ± 0.68 kHz.
Through dual-driven method, we successfully access to the effective red detuning zone for platicon generation in normal dispersion regime via intensity-modulated pump, and phase noise performance also beats local oscillator at high frequency.
We report a Si3N4 microresonator which simultaneously satisfies single-mode operation, high Q-factor and anomalous dispersion. With controlled high-speed pump-wavelength scanning, we successfully observe smooth phase-locked Kerr frequency comb transition based on dissipative solitons.
We report a Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> microresonator which simultaneously satisfies single-mode operation, high Q-factor and anomalous dispersion. With controlled high-speed pump-wavelength scanning, we successfully observe smooth phase-locked Kerr frequency comb transition based on dissipative solitons.
We demonstrate a novel method of dual-soliton generation with fixed azimuthal angle in dual-pumped microresonator. A relationship between the pump detuning from an avoided mode crossing on is studied.
We generate a square platicon with 17 ps pulse width and 21% pump-to-comb conversion efficiency in the normal dispersion regime. A 2 can be accessed auxiliary-laser-assisted thermal stabilization.
Summary form only given. We report the generation of coherent THz frequency combs in high-Q nonlinear microcavities. Driven by a continuous-wave laser and with Lugiato-Lefever formalism, efficient Turing pattern has exceptional robustness is observed two-accompanying differential resonators. Square-spectrum are also observed, towards radiation.
Here we report a unique lotus-like dual dissipative soliton spectrum generated in an 88 GHz tapered Si3N4 microring. The mode-locking nature is verified by both amplitude noise and FROG measurement. A continuous phase shifting of such state successfully observed directly frequency domain.