Publications (13)
Spatial Phase and Amplitude Structuring of Beams Using a Combination of Multiple Orthogonal Spatial Functions with Complex Coefficients
Guodong Xie, Cong Liu, Long Li +13
Analogous to time signals that can be composed of multiple frequency functions, we use uniquely structured orthogonal spatial modes to create different beam shapes. We tailor the s…
Observation of anti-parity-time-symmetry, phase transitions and exceptional points in an optical fibre
Arik Bergman, Robert Duggan, Kavita Sharma +3
The exotic physics emerging in non-Hermitian systems with balanced distributions of gain and loss has drawn a great deal of attention in recent years. These systems exhibit phase t…
Suspended thin-film lithium niobate modulator for broadband mid-infrared light modulation and frequency comb generation
Chun-Ho Lee, Xinyi Ren, Xinzhou Su +12
The mid-infrared (MIR) spectral regime is central to applications including remote sensing, precision spectroscopy, higher harmonic generation, and free-space optical communication…
Orthogonally Polarized Kerr Frequency Combs
Changjing Bao, Peicheng Liao, Arne Kordts +16
Kerr optical frequency combs with multi-gigahertz spacing have previously been demonstrated in chip-scale microresonators, with potential applications in coherent communication, sp…
Temporally and Longitudinally Tailored Dynamic Space-Time Wave Packets
Xinzhou Su, Kaiheng Zou, Huibin Zhou +10
In general, space-time wave packets with correlations between transverse spatial fields and temporal frequency spectra can lead to unique spatiotemporal dynamics, thus enabling con…
Using a Complex Optical Orbital-Angular-Momentum Spectrum to Measure Object Parameters: A Spatial Domain Approach
Guodong Xie, Haoqian Song, Zhe Zhao +11
Light beams can be characterized by their complex spatial profiles in both intensity and phase. Analogous to time signals, which can be decomposed into multiple orthogonal frequenc…
Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications
Yongxiong Ren, Long Li, Zhe Wang +14
To increase system capacity of underwater optical communications, we employ the spatial domain to simultaneously transmit multiple orthogonal spatial beams, each carrying an indepe…
80-Gbit/s 100-m Free-Space Optical Data Transmission Link via a Flying UAV Using Multiplexing of Orbital-Angular-Momentum Beams
Long Li, Runzhou Zhang, Zhe Zhao +12
We explore the use of orbital-angular-momentum (OAM)-multiplexing to increase the capacity of free-space data transmission to moving platforms, with an added potential benefit of d…
Performance Metrics and Design Parameters for a Free-space Communication Link Based on Multiplexing of Multiple Orbital-Angular-Momentum Beams
Guodong Xie, Long Li, Yongxiong Ren +10
We study the design parameters for an orbital angular momentum (OAM) multiplexed free-space data link. Power loss, channel crosstalk and power penalty of the link are analyzed in t…
Dynamic Spatiotemporal Beams that Combine Two Independent and Controllable Orbital-Angular-Momenta Using Multiple Optical-Frequency-Comb Lines
Zhe Zhao, Hao Song, Runzhou Zhang +10
Novel forms of beam generation and propagation based on structured light and orbital angular momentum (OAM) have gained significant interest over the past several years. Indeed, dy…
Automatic Mitigation of Dynamic Atmospheric Turbulence Using Optical Phase Conjugation for Coherent Free-Space Optical Communications
Huibin Zhou, Xinzhou Su, Yuxiang Duan +8
Coherent detection can provide enhanced receiver sensitivity and spectral efficiency in free-space optical (FSO) communications. However, turbulence can cause modal power coupling…
Turbulence-Resilient Coherent Free-Space Optical Communications using Automatic Power-Efficient Pilot-Assisted Optoelectronic Beam Mixing of Many Modes
Runzhou Zhang, Nanzhe Hu, Huibin Zhou +15
Atmospheric turbulence generally limits free-space optical (FSO) communications, and this problem is severely exacerbated when implementing highly sensitive and spectrally efficien…
Method for characterizing single photon detectors in saturation regime by cw laser
Jungmi Oh, Cristian Antonelli, Moshe Tur +1
We derive an analytical expression for the count probability of a single photon detector for a wide range of input optical power that includes afterpulsing effects. We confirm the…