2.5k citations · 3.1k across the 23 of their papers we have counts for
23 papers
Compact lithium niobate photonic integrated circuits
Yan Gao, Fuchuan Lei, Marcello Girardi +4
Lithium niobate (LN) is a promising material for future complex photonic-electronic circuits, with wide applications in fields like communications, sensing, quantum optics, and com…
Differential phase reconstruction of microcombs
Krishna Twayana, Fuchuan Lei, Zhichao Ye +4
Measuring microcombs in amplitude and phase provides unique insight into the nonlinear cavity dynamics but spectral phase measurements are experimentally challenging. Here, we repo…
Hyperparametric oscillation via bound states in the continuum
Fuchuan Lei, Zhichao Ye, Krishna Twayana +5
Optical hyperparametric oscillation based on the third-order nonlinearity is one of the most significant mechanisms to generate coherent electromagnetic radiation and produce quant…
Power-efficient soliton microcombs
Óskar B. Helgason, Marcello Girardi, Zhichao Ye +3
Laser frequency combs are enabling some of the most exciting scientific endeavours in the 21st century, ranging from the development of optical clocks to the calibration of the ast…
Thermal noise reduction in soliton microcombs via laser self-cooling
Fuchuan Lei, Zhichao Ye, Victor Torres-Company
Thermal noise usually dominates the low-frequency region of the optical phase noise of soliton microcombs, leading to decoherence and limiting many aspects of applications. In this…
Integrated, ultra-compact high-Q silicon nitride microresonators for low-repetition-rate soliton microcombs
Zhichao Ye, Fuchuan Lei, Krishna Twayana +3
Multiple applications of relevance in photonics, such as spectrally efficient coherent communications, microwave synthesis or the calibration of astronomical spectrographs, would b…
Blue-band frequency comb and photodarkening in silica whispering gallery microresonators
Ke Tian, Jibo Yu, Fuchuan Lei +4
To date there are extensive studies of optical nonlinearities in whispering gallery resonators (WGRs) in the near and mid-infrared wavelengths. Pushing this research into the visib…
Optical linewidth of soliton microcombs
Fuchuan Lei, Zhichao Ye, Óskar B. Helgason +3
Soliton microcombs provide a versatile platform for realizing fundamental studies and technological applications. To be utilized as frequency rulers for precision metrology, solito…
Experimental realization of sensitivity enhancement and suppression with exceptional surfaces
Guoqing Qin, Ranran Xie, Hao Zhang +6
By preparing a sensor system around isolated exceptional points, one can obtain a great enhancement of the sensitivity benefiting from the non-Hermiticity. However, this comes at t…
Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity
Fuchuan Lei, Georgiy Tkachenko, Xuefeng Jiang +3
Directional coupling of light in nanophotonic circuits has recently attracted increasing interest, with numerous experimental realizations based on broken rotational or mirror symm…
Polarization-Controlled Cavity Input-Output Relations
Fuchuan Lei, Jonathan M. Ward, Priscila Romagnoli +1
Cavity input-output relations (CIORs) describe a universal formalism relating each of the far-field amplitudes outside the cavity to the internal cavity fields. Conventionally, the…
Polarisation control for optical nanofibres by imaging through a single lens
Georgiy Tkachenko, Fuchuan Lei, Síle Nic Chormaic
We present a simple method for controlling the polarisation state of light at the waist of a single-mode optical nanofibre. The method consists of complete polarisation compensatio…
Complete polarization control for a nanofiber waveguide using directional coupling
Fuchuan Lei, Georgiy Tkachenko, Jonathan M. Ward +1
Optical nanofiber waveguides are widely used for near-field delivery and measurement of light. Despite their versatility and efficiency, nanofibers have a critical drawback - their…
Raman Laser Switching Induced by Cascaded Light Scattering
Sho Kasumie, Fuchuan Lei, Jonathan M Ward +3
We show that, in multimode Raman lasers, cascaded light scattering (CLS) not only extends the optical frequency range, but could also modulate the laser dynamics. The origin of thi…
Excitation of whispering gallery modes with a "point-and-play", fiber-based, optical nano-antenna
Jonathan M. Ward, Fuchuan Lei, Stephy Vincent +4
We demonstrate the excitation and detection of whispering gallery modes in optical microresonators using a "point-and-play", fiber-based, optical nano-antenna. The coupling mechani…
Gain lifetime characterization through time-resolved stimulated emission in a whispering-gallery mode microresonator
Xiao-Fei Liu, Fuchuan Lei, Tie-Jun Wang +2
The precise measurement of the gain lifetime at a specific wavelength holds significant importance for understanding the properties of photonic devices and further improving their…
Pump induced lasing suppression in Yb:Er-doped microlasers
Fuchuan Lei, Yong Yang, Jonathan Ward +1
A pump source is one of the essential prerequisites in order to achieve lasing, and, in most cases, a stronger pump leads to higher laser power at the output. However, this behavio…
All-Optical Nanopositioning of High-Q Silica Microspheres
Rafino M. J. Murphy, Fuchuan Lei, Jonathan M. Ward +2
A tunable, all-optical, coupling method has been realized for a high-\textit{Q} silica microsphere and an optical waveguide. By means of a novel optical nanopositioning method, ind…
Bandpass transmission spectra of a whispering-gallery microcavity coupled to an ultrathin fiber
Fuchuan Lei, Rafino M. J. Murphy, Jonathon M. Ward +2
Tapered fibers with diameters ranging from 1-4 micron are widely used to excite the whispering-gallery (WG) modes of microcavities. Typically, the transmission spectrum of a WG cav…
Tunable erbium-doped microbubble laser fabricated by sol-gel coating
Yong Yang, Fuchuan Lei, Sho Kasumie +4
In this work, we show that the application of a sol-gel coating renders a microbubble whispering gallery resonator into an active device. During the fabrication of the resonator, a…
Self-Sustained Oscillation and Dynamical Multistability of Optomechanical Systems in the Extremely-Large-Amplitude Regime
Ming Gao, Fuchuan Lei, Chuanguang Du +1
Optomechanics concerns with the coupling between optical cavities and mechanical resonators. Most early works are concentrated in the physics of optomechanics in the small-displace…
Dynamics and entanglement of a membrane-in-the-middle optomechanical system in the extremely-large-amplitude regime
Ming Gao, Fuchuan Lei, ChunGuang Du +1
The study of optomechanical systems has attracted much attention, most of which are concentrated in the physics in the small-amplitude regime. While in this article, we focus on op…
Nonreciprocal light transmission in parity-time-symmetric whispering-gallery microcavities
Bo Peng, Sahin Kaya Ozdemir, Fuchuan Lei +7
Optical systems combining balanced loss and gain profiles provide a unique platform to implement classical analogues of quantum systems described by non-Hermitian parity-time- (PT-…