A5066304006- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Spectroscopy and Laser Applications
- Photonic Crystal and Fiber Optics
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Spectroscopy Techniques in Biomedical and Chemical Research
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Mass Spectrometry Techniques and Applications
- Quantum optics and atomic interactions
- Optical Network Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Solid State Laser Technologies
- Semiconductor Lasers and Optical Devices
- Neural Networks and Reservoir Computing
- Diamond and Carbon-based Materials Research
- Photonic Crystals and Applications
- Terahertz technology and applications
- Atmospheric Ozone and Climate
- Quantum Information and Cryptography
- Pesticide Residue Analysis and Safety
- Various Chemistry Research Topics
Vector Oncology (United States)
2023-2024
University of Colorado Boulder
2018-2022
National Institute of Standards and Technology
2017-2022
National Institute of Standards
2021
University of Colorado System
2021
Yuncheng University
2018
Stony Brook University
2018
Northwestern University
2011-2015
Jet Propulsion Laboratory
2014
Spectroscopy in the molecular fingerprint spectral region (6.7–20 µm) yields critical information on material structure for physical, chemical, and biological sciences. Despite decades of interest effort, this portion electromagnetic spectrum remains challenging to cover with conventional laser technologies. In paper, we present a simple robust method generating super-octave, optical frequency combs through intra-pulse difference generation an orientation-patterned gallium phosphide crystal....
Probing matter with light in the mid-infrared provides unique insight into molecular composition, structure, and function high sensitivity. However, laser spectroscopy this spectral region lacks broadband or tunable sources efficient detectors available visible near-infrared. We overcome these challenges an approach that unites a compact source of phase-stable, single-cycle, pulses room temperature electric field-resolved detection at video rates. The ultrashort correspond to frequency combs...
Using aluminum-nitride photonic-chip waveguides, we generate optical-frequency-comb supercontinuum spanning from 500 nm to 4000 with a 0.8 nJ seed pulse, and show that the spectrum can be tailored by changing waveguide geometry. Since aluminum nitride exhibits both quadratic cubic nonlinearities, spectra feature simultaneous contributions numerous nonlinear mechanisms: generation, difference-frequency second-harmonic third-harmonic generation. As one application of integrating multiple...
Abstract Tremendous scientific progress has been achieved through the development of nonlinear integrated photonics. Prominent examples are Kerr frequency comb generation in microresonators, and supercontinuum conversion photonic waveguides. A high efficiency is enabling for applications optics, including such broad directions as high‐speed optical signal processing, metrology, quantum communication computation. In this work, a gallium‐arsenide‐on‐insulator (GaAs) platform photonics...
Deployed optical clocks will improve positioning for navigational autonomy
The microscale integration of mid- and long-wave-infrared photonics could enable the development fieldable, robust chemical sensors, as well highly efficient infrared frequency converters. However, such technology would be defined by choice material platform, which immediately determines strength types optical nonlinearities available, transparency window, modal confinement, physical robustness. In this work, we demonstrate a new suspended AlGaAs waveguides integrated on silicon, providing...
Mid-infrared laser frequency combs are compelling sources for precise and sensitive metrology with applications in molecular spectroscopy spectro-imaging. The infrared atmospheric window between 3-5.5 $\mu$m particular provides vital information regarding composition. Using a robust, fiber-optic source of few-cycle pulses the near-infrared, we experimentally demonstrate ultra-broad bandwidth nonlinear phenomena including harmonic difference generation single pass through periodically poled...
Optical waveguides made from periodically poled materials provide high confinement of light and enable the generation new wavelengths via quasi-phase-matching, making them a key platform for nonlinear optics photonics. However, such devices are not typically employed high-harmonic generation. Here, using 200-fs, 10-nJ-level pulses 4100-nm at 1 MHz, we generate harmonics up to 13th harmonic (315 nm) in chirped, lithium niobate waveguide. Total conversion efficiencies into visible–ultraviolet...
Laser frequency combs, with their unique combination of precisely defined spectral lines and broad bandwidth, are a powerful tool for basic applied spectroscopy. Here, we report offset-free, mid-infrared combs dual-comb spectroscopy through supercontinuum generation in silicon-on-sapphire waveguides. We leverage robust fabrication geometrical dispersion engineering nanophotonic waveguides multi-band, coherent spanning 70 THz the (2.5 μm–6.2 μm). Precise waveguide provides significant...
Nanophotonic waveguides with sub-wavelength mode confinement and engineered dispersion profiles are an excellent platform for application-tailored nonlinear optical interactions at low pulse energies.Here, we present fully air clad suspended-silicon infrared frequency comb generation bandwidth limited only by the silicon transparency.The achieved spectra lithographically tailored to span 2.1 octaves in mid-infrared (2.0-8.5 µm or 1170-5000 cm -1 ) when pumped 3.10 100 pJ pulses.Novel...
High-harmonic generation (HHG) provides short-wavelength light that is useful for precision spectroscopy and probing ultrafast dynamics. We report efficient, phase-coherent harmonic up to the ninth order (333 nm) in chirped periodically poled lithium niobate waveguides driven by phase-stable <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>≤</mml:mo> </mml:mrow> <mml:mn>12</mml:mn> <mml:mspace width="thickmathspace"/>...
Laser frequency combs (LFCs) are an important component of Doppler radial velocity (RV) spectroscopy that pushes fractional precision to the $10^{-10}$ level, as required identify and characterize Earth-like exoplanets. However, large intensity variations across LFC spectrum arise in nonlinear broadening limit range comb lines can be used for optimal wavelength calibration with sufficient signal-to-noise ratio. Furthermore, temporal spectral-intensity fluctuations LFC, coupled flux-dependent...
We demonstrate sum-frequency generation in a nonlinear whispering gallery mode resonator between telecom wavelength and the Rb D2 line, achieved through natural phase matching. Due to strong optical field confinement ultra high Q of cavity, we achieve 1000-fold enhancement conversion efficiency compared existing waveguide-based devices. The experimental data are agreement with dynamics matching theory spherical geometry employed. theoretical results point new platform manipulate color...
We describe a technique for dynamic quantum optical arbitrary-waveform generation and manipulation, which is capable of mode selectively operating on signals without inducing significant loss or decoherence. It built upon combining the developed tools frequency conversion arbitrary waveform generation. Considering realistic parameters, we propose analyze applications such as programmable reshaping picosecond-scale temporal modes, selective any one superposition those mode-resolved photon...
Supercontinuum generation in integrated photonic waveguides is a versatile source of broadband light, and the generated spectrum largely determined by phase-matching conditions. Here we show that quasi-phase-matching via periodic modulations waveguide structure provides useful mechanism to control evolution ultrafast pulses supercontinuum spectrum. We experimentally demonstrate quasi-phase-matched TE20 TE00 modes, which enhances intensity SCG specific spectral regions as much 20 dB. utilize...
Low noise and high repetition rate optical frequency combs are desirable for many applications from timekeeping to precision spectroscopy. For example, gigahertz sources greatly increase the acquisition speed of spectra in a dual-comb modality when compared lower sources, while still maintaining sufficient instantaneous resolution resolve ro-vibrational signatures molecules variety conditions. In this paper, we present stabilization characterization turnkey commercial 1~GHz mode-locked laser...
We experimentally demonstrate all-optical interaction-free switching using the quantum Zeno effect, achieving a high contrast of 35:1. The experimental data match zero-parameter theoretical model for several different regimes operation, indicating good understanding switch's characteristics. also discuss extensions this work that will allow significantly improved performance, and integration technology onto chip-scale devices, which can lead to ultra-low-power switching, long-standing goal...
We experimentally demonstrate wide-band (>100 THz) frequency down-conversion of near-infrared (NIR) femtosecond-scale pulses from an Er:fiber laser to the mid-infrared (MIR) using four-wave-mixing (FWM) in photonic-chip silicon-nitride waveguides. The engineered dispersion nanophotonic geometry, along with wide transparency range silicon nitride, enables large-detuning FWM phase-matching and results tunable MIR 2.6-3.6 um on a single chip 100-pJ-scale pump-pulse energies. Additionally, we...
We report on the development of a high-power mid-infrared frequency comb with 100 MHz repetition rate and fs pulse duration. Difference generation is realized between two branches derived from an Er:fiber comb, amplified separately in Yb:fiber amplifiers. Average powers 6.7 W 14.9 are generated 2.9 µm idler 1.6 signal, respectively. With high average power, excellent beam quality, passive carrier-envelope phase stabilization, this light source promising platform for generating broadband...
We experimentally demonstrate a simple configuration for mid-infrared (MIR) frequency comb generation in quasi-phase-matched lithium niobate waveguides using the cascaded-χ(2) nonlinearity. With nanojoule-scale pulses from an Er:fiber laser, we observe octave-spanning supercontinuum near-infrared with dispersive wave 2.5-3 μm region and intrapulse difference 4-5 region. By engineering grating profiles, tunable, narrowband MIR broadband spectra are both observed this geometry. Finally,...
We demonstrate highly efficient photon-pair generation using an 8 mm long hydrogenated amorphous silicon (a-Si:H) waveguide in far-detuned multiple wavelength channels simultaneously, measuring a coincidence-to-accidental ratio as high 400. also characterize the contamination from Raman scattering and show it to be insignificant over spectrum span of at least 5 THz. Our results highlight a-Si:H potential high-performance, CMOS-compatible platform for large-scale quantum applications,...