Ryan M. Briggs
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View article: High-resolution long-distance depth imaging LiDAR with ultra-low timing jitter superconducting nanowire single-photon detectors
High-resolution long-distance depth imaging LiDAR with ultra-low timing jitter superconducting nanowire single-photon detectors Open
Single-photon time-of-flight light detection and ranging (LiDAR) is a versatile technique for the measurement of absolute distances and for depth profiling. It has a wide variety of applications (e.g., land surveying, autonomous car naviga…
View article: SNSPD-based detector system for NASA’s Deep Space Optical Communications project
SNSPD-based detector system for NASA’s Deep Space Optical Communications project Open
We report on a free-space-coupled superconducting nanowire single-photon detector array developed for NASA’s Deep Space Optical Communications project (DSOC). The array serves as the downlink detector for DSOC’s primary ground receiver ter…
View article: Membrane-based mesh filter for far-infrared radiation
Membrane-based mesh filter for far-infrared radiation Open
Future space-based far-infrared instruments rely on optical components that enable high-efficiency observations in challenging environments. Here we demonstrate membrane-based mesh bandpass filters for far-infrared electromagnetic waves, t…
View article: An SNSPD-based detector system for NASA's Deep Space Optical Communications project
An SNSPD-based detector system for NASA's Deep Space Optical Communications project Open
We report on a free-space-coupled superconducting nanowire single-photon detector array developed for NASA's Deep Space Optical Communications project (DSOC). The array serves as the downlink detector for DSOC's primary ground receiver ter…
View article: Scanning cavity OF-CEAS technique for rapid collection of high resolution spectra
Scanning cavity OF-CEAS technique for rapid collection of high resolution spectra Open
We present a modified approach to laser optical-feedback cavity-enhanced absorption spectroscopy. The technique involves continuously scanning the length of a high-finesse cavity to periodically lock a diode laser to the cavity resonance, …
View article: Octave-spanning tunable infrared parametric oscillators in nanophotonics
Octave-spanning tunable infrared parametric oscillators in nanophotonics Open
Widely tunable coherent sources are desirable in nanophotonics for a multitude of applications ranging from communications to sensing. The mid-infrared spectral region (wavelengths beyond 2 μm) is particularly important for applications re…
View article: Visible to Ultraviolet Frequency Comb Generation in Lithium Niobate Nanophotonic Waveguides
Visible to Ultraviolet Frequency Comb Generation in Lithium Niobate Nanophotonic Waveguides Open
The introduction of nonlinear nanophotonic devices to the field of optical frequency comb metrology has enabled new opportunities for low-power and chip-integrated clocks, high-precision frequency synthesis, and broad bandwidth spectroscop…
View article: Semiconductor wire array structures, and solar cells and photodetectors based on such structures
Semiconductor wire array structures, and solar cells and photodetectors based on such structures Open
A structure comprising an array of semiconductor structures, an infill material between the semiconductor materials, and one or more light-trapping elements is described. Photoconverters and photoelectrochemical devices based on such struc…
View article: Visible-to-mid-IR tunable frequency comb in nanophotonics
Visible-to-mid-IR tunable frequency comb in nanophotonics Open
Optical frequency comb is an enabling technology for a multitude of applications from metrology to ranging and communications. The tremendous progress in sources of optical frequency combs has mostly been centered around the near-infrared …
View article: Octave-spanning tunable parametric oscillation in nanophotonics
Octave-spanning tunable parametric oscillation in nanophotonics Open
Widely-tunable coherent sources are desirable in nanophotonics for a multitude of applications ranging from communications to sensing. The mid-infrared spectral region (wavelengths beyond 2 $μ$m) is particularly important for applications …
View article: Thin THz QCL active regions for improved continuous-wave operating temperature
Thin THz QCL active regions for improved continuous-wave operating temperature Open
We compare the performance of 10 and 5 μm thick metal–metal waveguide terahertz quantum-cascade laser ridges operating around 2.7 THz and based on a 4-well phonon depopulation active region design. Thanks to reduced heat dissipation and lo…
View article: Free-space coupled superconducting nanowire single-photon detector with low dark counts
Free-space coupled superconducting nanowire single-photon detector with low dark counts Open
A free-space coupled superconducting nanowire single-photon detector with high efficiency at 1550 nm, sub-0.1 Hz dark count rate, and sub-15 ps timing jitter is demonstrated.
View article: Impedance-matched differential superconducting nanowire detectors
Impedance-matched differential superconducting nanowire detectors Open
Superconducting nanowire single-photon detectors (SNSPDs) are the highest performing photon-counting technology in the near-infrared (NIR). Due to delay-line effects, large area SNSPDs typically trade-off timing resolution and detection ef…
View article: Single-photon detection in the mid-infrared up to 10 <i>μ</i>m wavelength using tungsten silicide superconducting nanowire detectors
Single-photon detection in the mid-infrared up to 10 <i>μ</i>m wavelength using tungsten silicide superconducting nanowire detectors Open
We developed superconducting nanowire single-photon detectors based on tungsten silicide, which show saturated internal detection efficiency up to a wavelength of 10 μm. These detectors are promising for applications in the mid-infrared re…
View article: Impedance-matched differential SNSPDs for practical photon counting with sub-10 ps timing jitter
Impedance-matched differential SNSPDs for practical photon counting with sub-10 ps timing jitter Open
We demonstrate large-area superconducting nanowire single-photon detectors (SNSPDs) with simultaneous high system detection efficiency and low system jitter. We describe the device architecture and discuss optimal readout setup for practic…
View article: Single-photon detection in the mid-infrared up to 10 micron wavelength using tungsten silicide superconducting nanowire detectors
Single-photon detection in the mid-infrared up to 10 micron wavelength using tungsten silicide superconducting nanowire detectors Open
We developed superconducting nanowire single-photon detectors (SNSPDs) based on tungsten silicide (WSi) that show saturated internal detection efficiency up to a wavelength of 10 um. These detectors are promising for applications in the mi…
View article: Demonstration of a Thermally Coupled Row-Column SNSPD Imaging Array
Demonstration of a Thermally Coupled Row-Column SNSPD Imaging Array Open
While single-pixel superconducting nanowire single photon detectors (SNSPDs) have demonstrated remarkable efficiency and timing performance from the UV to near-IR, scaling these devices to large imaging arrays remains challenging. Here, we…
View article: 2.0 micron wavelength injection seed semiconductor laser for lidar transmitter for global-scale measurements of CO2
2.0 micron wavelength injection seed semiconductor laser for lidar transmitter for global-scale measurements of CO2 Open
Many of the high accuracy Earth science survey missions are planned to use laser-based remote sensing instruments. The 2-μm laser wavelength is of particular interest due to the presence of many CO2 and H20 absorption lines in its vicinity…
View article: Compact Multi-Channel Infrared Laser Absorption Spectrometer for Spacecraft Fire Safety Monitoring
Compact Multi-Channel Infrared Laser Absorption Spectrometer for Spacecraft Fire Safety Monitoring Open
United States
View article: Low-dissipation 74-µm single-mode quantum cascade lasers without epitaxial regrowth
Low-dissipation 74-µm single-mode quantum cascade lasers without epitaxial regrowth Open
We report continuous-wave operation of single-mode quantum cascade (QC) lasers emitting near 7.4 µm with threshold power consumption below 1 W at temperatures up to 40 °C. The lasers were fabricated with narrow, plasma-etched waveguides an…