287 citations · 1.7k across the 59 of their papers we have counts for
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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…
On-chip integrated waveguide amplifiers on Erbium-doped thin film lithium niobate on insulator
Junxia Zhou, Youting Liang, Zhaoxiang Liu +11
We demonstrate on-chip light amplification with integrated optical waveguide fabricated on erbium-doped thin film lithium niobate on insulator (TFLNOI) using the photolithography a…
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…
Incubation Induced Light Concentration Beyond the Diffraction Limit for High-Resolution Glass Printing
Haisu Zhang, Peng Wang, Wei Chu +5
In the past two decades, tremendous efforts have been exerted to understand and control the delivery of ultrashort laser pulses into various types of transparent materials ranging…
Extreme nonlinear Raman interaction of an ultrashort nitrogen ion laser with an impulsively excited molecular wavepacket
Zhaoxiang Liu, Jinping Yao, Haisu Zhang +8
We report generation of cascaded rotational Raman scattering up to 58th orders in coherently excited CO_2 molecules. The high-order Raman scattering, which produces a quasiperiodic…
Efficient Electro-optical Tuning of Optical Frequency Microcomb on a Monolithically Integrated High-Q Lithium Niobate Microdisk
Zhiwei Fang, Haipeng Luo, Jintian Lin +7
We demonstrate efficient tuning of a monolithically integrated lithium niobate microdisk (LN) optical frequency microcomb. Utilizing the high optical quality (Q) factor (i.e., Q~7.…
Polarization-insensitive space-selective etching in fused silica induced by picosecond laser irradiation
Xiaolong Li, Jian Xu, Zijie Lin +7
It is well known that when the fused silica is irradiated with focused femtosecond laser beams, space selective chemical etching can be achieved. The etching rate depends sensitive…
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…
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…
Near-resonant Raman amplification in the rotational quantum wavepackets of nitrogen molecular ions generated by strong field ionization
Zhaoxiang Liu, Jinping Yao, Jinming Chen +3
Generation of laser-like narrow bandwidth emissions from nitrogen molecular ions generated in intense near- and mid-infrared femtosecond laser fields has aroused much interest beca…
Metal surface structuring with spatiotemporally focused femtosecond laser pulses
Yuanxin Tan, Wei Chu, Jintian Lin +3
Femtosecond laser micromachining provides high precision and less thermal diffusion in surface structuring as a result of the ultrashort temporal duration and ultrahigh peak intens…
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…
On-chip electro-optic tuning of a lithium niobate microresonator with integrated in-plane microelectrodes
Min Wang, Yingxin Xu, Zhiwei Fang +7
We demonstrate electro-optic tuning of an on-chip lithium niobate microresonator with integrated in-plane microelectrodes. First two metallic microelectrodes on the substrate were…
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…
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…
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…
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…
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…
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…
Non-perturbative generation of above-threshold harmonics from pre-excited argon atoms in intense mid-infrared laser fields
Guihua Li, Hongqiang Xie, Ziting Li +4
We experimentally investigate the generation of above-threshold harmonics completely from argon atoms on an excited state using mid-infrared femtosecond laser pulses. The highly no…
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…
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…
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…
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…