Molly Fahey

Molly Fahey
National Aeronautics and Space Administration · Laser and Electro-Optics

About

40
Publications
4,301
Reads
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173
Citations

Publications

Publications (40)
Article
Full-text available
Rationale Characterization of Regolith And Trace Economic Resources (CRATER), an Orbitrap™‐based laser desorption mass spectrometry instrument designed to conduct high‐precision, spatially resolved analyses of planetary materials, is capable of answering outstanding science questions about the Moon's formation and the subsequent processes that have...
Article
Full-text available
Laser desorption mass spectrometry (LDMS) enables in situ characterization of the organic content and chemical composition of planetary materials without requiring extensive sample processing. Coupled with an Orbitrap analyser capable of ultrahigh mass-resolving powers and accuracies, LDMS techniques facilitate the orthogonal detection of a wide ra...
Conference Paper
We report on the design philosophy, technology readiness level advancement for space application, laser performance verification, and independent assessment of a single frequency, ultra-low noise master oscillator power amplifier laser transmitter for the LISA mission.
Conference Paper
We report on the development of ultraviolet and visible laser sources operating at 213 nm, 266 nm, and 515 nm for laser-enabled mass and Raman spectrometer instruments for future in situ planetary lander missions.
Article
Full-text available
At NASA Goddard Space Flight Center (GSFC), we have been developing spaceborne lidar instruments for space sciences. We have successfully flown several missions in the past based on mature diode pumped solid-state laser transmitters. In recent years we have been developing advanced laser technologies for applications such as laser spectroscopy, las...
Conference Paper
Full-text available
At NASA Goddard Space Flight Center, we have been developing spaceborne lidar instruments for space sciences. We have successfully flown several missions in the past based on mature diode pumped solid-state laser transmitters. In recent years, we have been developing advanced laser technologies for applications such as laser spectroscopy, laser com...
Article
Remote sensing of methane fluxes has been highlighted as one of the measurement goals of the NASA 2017 Earth Science Decadal Survey. Measuring methane from space and airborne platforms with an active (laser) remote sensing instrument presents several technology and measurement challenges that need to be met in order to provide accurate and precise...
Conference Paper
Full-text available
NASA-Goddard is developing a high-fidelity space-based remote sensor for atmospheric CO2. We report on a the instrument architecture and performance and the technology developments for a low earth orbiting instrument.
Conference Paper
NASA is developing a highly stable, robust and reliable master oscillator power amplifier laser transmitter. We will discuss our technology development and progress on a spaceborne laser transmitter for the LISA mission.
Conference Paper
NASA GSFC is developing a space-based sodium resonance fluorescence lidar for the International Space Station (ISS). We discuss the technology, prototypes, risks and trades for two laser architectures - Raman laser and sum frequency generation.
Conference Paper
Full-text available
NASA Goddard Space Flight Center has been developing an integrated path differential absorption (IPDA) lidar instrument concept to measure the column concentrations of atmospheric carbon dioxide (CO2) from space. We will discuss the development effort of a space-qualified, single frequency, fiber-based master oscillator power amplifier with >450 µJ...
Article
Full-text available
We present modeling and performance of a solid, fused silica, 3-mirror Fabry–Perot-type etalon. 3-mirror etalons have been known for decades to have superior theoretical performance but for the first time we demonstrate an etalon with sufficient quality to realize the benefits of the more complex design. 3-mirror etalons have better passband shape...
Conference Paper
We are developing a multi-wavelength laser for the two-step laser time-of-flight mass-spectrometer (L2MS). The L2MS is designed to detect hydrocarbons in organically-doped analog minerals, including cryogenic Ocean World-relevant ices and mixtures for future astrobiology missions.
Conference Paper
Future astrobiology missions will focus on planets with significant astrochemical or potential astrobiological features, such as small, primitive bodies and the icy moons of the outer planets that may host diverse organic compounds. We have made significant progress in the laser desorption/ionization mass spectrometry area with advancement in the t...
Conference Paper
Atmospheric methane is the second most important greenhouse gas with 25 times the radiative forcing of carbon dioxide. We will present results from an airborne campaign using a lidar at 1.65µm using optical parametric generation.
Conference Paper
We describe a Fabry-Perot etalon spectrometer with a novel light recirculation scheme to generate simultaneous parallel wavelength channels with no moving parts. We also present results from a 3-mirror solid Fabry-Perot.
Conference Paper
The advent of several key enabling electro-optics technologies afford advanced, non-topographic remote sensing instruments for space. We will present progress on several new, space-based laser instruments that are being developed at NASA GSFC. Article not available.
Article
Full-text available
We describe a Fabry-Perot etalon spectrometer with a novel light recirculation scheme to generate simultaneous parallel wavelength channels with no moving parts. This design uses very simple optics to recirculate light reflected from near normal incidence from the etalon at successively higher angles of incidence. The spectrometer has the full reso...
Article
Full-text available
An orbiting laser remote sensing instrument (lidar) capable of measuring trace gases on global scales with unprecedented accuracy and high spatial resolution can provide valuable measurements for planetary and earth science missions.
Article
A desktop diode pulsed laser having pulse width of 1.3 ps and wavelength of 1552 nm is utilized for precise targeted ablation of dentin, enamel, and composite material while minimizing thermal damage to the surrounding healthy tissue and nerve endings. A thermal imaging camera is used to measure the dental surface temperature rise during ablation....
Article
Short pulse lasers are used for a variety of therapeutic applications in medicine. Recently ultra-short pulse lasers have gained prominence due to the reduction in collateral thermal damage to surrounding healthy tissue during tissue ablation. In this paper, ultra-short pulsed laser ablation of mouse skin tissue is analyzed by assessing the extent...
Conference Paper
For last few decades laser-induced tumor ablation has attracted significant attention of researchers. The accessibility of tumors located deep inside the body organ using fiber-optic probe without any major surgical resection has made this method an alternative for conventional surgical resection. Various minimally invasive techniques have been dev...
Conference Paper
Ultra-short pulsed lasers are known for their ability to precisely machine materials including human hard and soft tissues while minimizing the amount of thermal energy deposited to the surroundings. Non-thermal ablation produced by ultra-short pulsed lasers in the femtosecond to picosecond range is very effective for dental applications. As shown...
Article
The role of low light intensity in suppressing metabolic activity of transformed cell lines was investigated through the applications of a 1,552nm wavelength pulsed picosecond laser. Human malignant glioblastoma, human leukemia HL-60, and the NIH 3T3 cell lines were used. The cells were grown in 96 well plates and exposed in their respective growth...

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