A5003427008- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Mechanical and Optical Resonators
- Solid State Laser Technologies
- Quantum Information and Cryptography
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Optical Coherence Tomography Applications
- Optical Wireless Communication Technologies
- Neural Networks and Reservoir Computing
- Advanced Fluorescence Microscopy Techniques
- Advanced Photonic Communication Systems
- Cancer Treatment and Pharmacology
- Experimental Learning in Engineering
- Advanced Optical Sensing Technologies
- E-Learning and Knowledge Management
- Random lasers and scattering media
- Plasmonic and Surface Plasmon Research
- Adaptive optics and wavefront sensing
- Nanotechnology research and applications
- Biomedical and Engineering Education
- Diamond and Carbon-based Materials Research
- Quantum optics and atomic interactions
- Optical Network Technologies
University of Rochester
2018-2024
The development of integrated semiconductor lasers has miniaturized traditional bulky laser systems, enabling a wide range photonic applications. A progression from pure III-V based to III-V/external cavity structures harnessed low-loss waveguides in different material leading significant improvements coherence and stability. Despite these successes, however, key functions remain absent. In this work, we address critical missing function by integrating the Pockels effect into laser. Using...
The development of quantum technologies on nanophotonic platforms has seen momentous progress in the past decade. Despite that, a demonstration time-frequency entanglement over broad spectral width is still lacking. Here we present an efficient source ultrabroadband entangled photon pairs periodically poled lithium niobate waveguide. Employing dispersion engineering, demonstrate record-high 100 THz (1.2 μm-2 μm) generation bandwidth with high efficiency 13 GHz/mW and excellent noise...
Abstract High‐coherence visible and near‐visible laser sources are centrally important to the operation of advanced position/navigation/timing systems as well classical/quantum sensing systems. However, complexity size these bench‐top lasers an impediment their transition beyond laboratory. Here, a system‐on‐chip that emits high‐coherence lightwaves is demonstrated. The devices rely upon new approach wherein wavelength conversion coherence increase by self‐injection locking combined within...
We report an on-chip high-speed visible-band electro-optic modulator that can operate over the full visible spectrum of 400–700 nm, with a record low <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi>V</mml:mi> <mml:mi>π</mml:mi> </mml:msub> </mml:mrow> <mml:mo>⋅</mml:mo> <mml:mi>L</mml:mi> </mml:math> 0.48, 0.25, and <mml:mn>0.17</mml:mn> <mml:mspace width="thickmathspace"/> <mml:mi...
Abstract Optical microcomb underpins a wide range of applications from communication, metrology, to sensing. Although extensively explored in recent years, challenges remain key aspects such as complex soliton initialization, low power efficiency, and limited comb reconfigurability. Here we present an on-chip laser address these challenges. Realized with integration between III V gain chip thin-film lithium niobate (TFLN) photonic integrated circuit (PIC), the directly emits mode-locked on...
Nonreciprocal optical systems have found many applications altering the linear transmission of light as a function its propagation direction. Here, we consider new class nonreciprocity which appears in photon pair correlations and not transmission. We experimentally demonstrate theoretically verify this second-order coherence functions pairs produced by spontaneous four-wave mixing silicon microdisk. Reversal pump direction can result substantial extinction without
We demonstrate a heterogeneously integrated self-injection locked lithium niobate laser via direct bonding. The single mode lasing power is as high 16 mW with side suppression ratio over 50 dB.
In this paper, we examine the problem of coupling partially coherent light from a telescope into an optical fiber within framework phase space optics using Wigner distributions. Specifically, consider optimization efficiency for passive systems under constraints in number spatial modes guided by fiber, as are often imposed limitations devices or detectors employed later chain. As our primary example, detail case monochromatic plane wave fields distorted random perturbations caused...
Photonic lanterns provide an efficient way of coupling light from a single large-core fiber to multiple small-core fibers. This capability is interest for space ground communication applications. In these applications, the optical receivers require high-efficiency atmospherically distorted focus spot coupled pixel super-conducting nanowire detectors. paper will explore use photonic in real-time receiver that scalable and constructed with commercial parts. The number fibers (i.e. array or...
High coherence visible and near-visible laser sources are centrally important to the operation of advanced position/navigation/timing systems as well classical/quantum sensing systems. However, complexity size these bench-top lasers is an impediment their transitioning beyond laboratory. Here, a system-on-a-chip that emits high-coherence lightwaves demonstrated. The devices rely upon new approach wherein wavelength conversion increase by self-injection-locking combined within in single...
We report a chip-scale InP/LiNbO 3 laser that directly emits mode-locked microcomb on demand, with spectral bandwidth ~50 nm, individual comb linewidth ~600 Hz, frequency tuning rate > 2.4 × 10 17 Hz/s, and 100% utilization of optical power for generation.
We demonstrate a chip-scale InP/LiNbO 3 mode-locked microcomb laser. This device demonstrates programmable mode-locking capabilities at various higher harmonics of the laser cavity’s free spectral range.
We report a chip-scale InP/LiNbO3 laser that directly emits mode-locked microcomb on demand, with spectral bandwidth ∼50 nm, individual comb linewidth ∼600 Hz, frequency tuning rate > 2.4 × 10 17 Hz/s, and 100% utilization of optical power for generation.
We report the first passive mode-locked soliton laser on a hybrid integrated InP/LiNbO 3 platform, with sech 2 -shaped spectrum and repetition rate of 43.9 GHz. The mode locking results from combined effect optical gain, Kerr effect, group-velocity dispersion inside cavity.
We demonstrate a sub-kHz linewidth integrated Pockels laser with mode-hop-free linear frequency modulation range of 15 GHz, and an on-chip power 5.4 mW.
The invention of the laser unleashed potential optical metrology, leading to numerous advancements in modern science and technology. This reliance on lasers, however, also sets a bottleneck for precision metrology which is complicated by sophisticated photonic infrastructure required delicate laser-wave control, limited performance significant system complexity. Here we make key step towards resolving this challenge, demonstrating Pockels with multi-functional capability that advances new...
Photon antibunching was observed from 20-nm-NV-nanodiamonds and nanocrystal quantum dots within bowtie plasmonic nanoantennas. We also showed polarization selectivity of these Numerical modeling carried out both for air tunable anisotropic environment.
By integrating two periodic poling structures into a single high-Q lithium niobate microresonator, cascaded SHG and SFG achieved third-harmonic generation on-chip at wavelength of 520 nm with an efficiency 0.6%.
Three advanced lab classes were taught both “in person” and remotely through Zoom with recording videos: (1) Sources Detectors; (2) Nanometrology (AFM, optical microscopy, electron microscopy); (3) Quantum Nano-Optics (entangled/single-photon sources).
We report a visible-band electro-optic modulator that can operate over the full visible spectrum of 400–700 nm, with record low V π · L 0.17V cm.
Optical frequency comb underpins a wide range of applications from communication, metrology, to sensing. Its development on chip-scale platform -- so called soliton microcomb provides promising path towards system miniaturization and functionality integration via photonic integrated circuit (PIC) technology. Although extensively explored in recent years, challenges remain key aspects such as complex initialization, high threshold, low power efficiency, limited reconfigurability. Here we...
<title>Abstract</title> Optical frequency comb underpins a wide range of applications from communication, metrology, to sensing. Its development on chip-scale platform -- so called soliton microcomb provides promising path towards system miniaturization and functionality integration via photonic integrated circuit (PIC) technology. Although extensively explored in recent years, challenges remain key aspects such as complex initialization, high threshold, low power efficiency, limited...
We have demonstrated asymmetry in biphoton coherence functions that arises upon reversing the propagation direction of a pump laser coupled into silicon microdisk. Oscillations experience an almost total phase shift. © 2019 The Author(s)