Mr. Luis A. Ramos-Izquierdo Profile

Luis A. Ramos-Izquierdo

at NASA Goddard Space Flight Ctr

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 3 October 2022 Paper

Paper

PACE OCI short-wave infrared detection assembly optical system design, alignment, and environmental test

James Champagne, Dallin Brailsford, Roy Esplin, Jacob Hedelius, Trent Newswander, James Peterson, Tyrel Rupp, Kenneth Squire, Eric Gorman, Emily Kan, D. Brent Mott, Luis Ramos-Izquierdo, Joe Thomes, Ulrik Gliese

Proceedings Volume 12222, 1222204 (2022) https://doi.org/10.1117/12.2633631

KEYWORDS: Sensors, Optical alignment, Geometrical optics, Optical design, Ocean optics, Channel projecting optics, Tolerancing, Signal detection, Optical filters, Short wave infrared radiation

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Proceedings Article | 9 September 2019 Paper

Paper

Optical system design and integration of the Global Ecosystem Dynamics Investigation Lidar

Shane Wake, Luis Ramos-Izquierdo, Bente Eegholm, Peter Dogoda, Zachary Denny, Michael Hersh, Michael Mulloney, W. Joe Thomes, Melanie Ott, Hali Jakeman, Demetrios Poulios, Peter Mule, Erich de Leon, J. Bryan Blair

Proceedings Volume 11128, 111280J (2019) https://doi.org/10.1117/12.2530653

KEYWORDS: Transmitters, Receivers, Fiber optics, Sensors, Beam expanders, Optical fabrication, Optical alignment, Optical design, Collimators, Telescopes, LIDAR, Remote sensing system design, Active remote sensing, Remote sensing

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Proceedings Article | 30 August 2019 Presentation + Paper

Presentation + Paper

Global Ecosystem Dynamics Investigation (GEDI) instrument alignment and test

Bente Eegholm, Shane Wake, Zachary Denny, Pete Dogoda, Demetrios Poulios, Barry Coyle, Pete Mulé, John Hagopian, Patrick Thompson, Luis Ramos-Izquierdo, Bryan Blair

Proceedings Volume 11103, 1110308 (2019) https://doi.org/10.1117/12.2532471

KEYWORDS: LIDAR, Optical metrology, Transmitters, Optical fibers, Mirrors, Optical benches, Telescopes, Collimators, Optical alignment, Receivers, Beam expanders

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Proceedings Article | 19 September 2016 Presentation + Paper

Presentation + Paper

Advanced topographic laser altimeter system (ATLAS) receiver telescope assembly (RTA) and transmitter alignment and test

John Hagopian, Matthew Bolcar, John Chambers, Allen Crane, Bente Eegholm, Tyler Evans, Samuel Hetherington, Eric Mentzell, Patrick Thompson, Luis Ramos-Izquierdo, David Vaughnn

Proceedings Volume 9972, 997207 (2016) https://doi.org/10.1117/12.2240241

KEYWORDS: Space telescopes, Telescopes, Optical fibers, Receivers, Transmitters, Diffractive optical elements, Collimators, Wavefronts, Mirrors, Interferometers

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The sole instrument on NASA’s ICESat-2 spacecraft shown in Figure 1 will be the Advanced Topographic Laser Altimeter System (ATLAS)¹. The ATLAS is a Light Detection and Ranging (LIDAR) instrument; it measures the time of flight of the six transmitted laser beams to the Earth and back to determine altitude for geospatial mapping of global ice. The ATLAS laser beam is split into 6 main beams by a Diffractive Optical Element (DOE) that are reflected off of the earth and imaged by an 800 mm diameter Receiver Telescope Assembly (RTA). The RTA is composed of a 2-mirror telescope and Aft Optics Assembly (AOA) that collects and focuses the light from the 6 probe beams into 6 science fibers. Each fiber optic has a field of view on the earth that subtends 83 micro Radians. The light collected by each fiber is detected by a photomultiplier and timing related to a master clock to determine time of flight and therefore distance. The collection of the light from the 6 laser spots projected to the ground allows for dense cross track sampling to provide for slope measurements of ice fields. NASA LIDAR instruments typically utilize telescopes that are not diffraction limited since they function as a light collector rather than imaging function. The more challenging requirements of the ATLAS instrument require better performance of the telescope at the ¼ wave level to provide for improved sampling and signal to noise. NASA Goddard Space Flight Center (GSFC) contracted the build of the telescope to General Dynamics (GD). GD fabricated and tested the flight and flight spare telescope and then integrated the government supplied AOA for testing of the RTA before and after vibration qualification. The RTA was then delivered to GSFC for independent verification and testing over expected thermal vacuum conditions. The testing at GSFC included a measurement of the RTA wavefront error and encircled energy in several orientations to determine the expected zero gravity figure, encircled energy, back focal length and plate scale. In addition, the science fibers had to be aligned to within 10 micro Radians of the projected laser spots to provide adequate margin for operations on-orbit. This paper summarizes the independent testing and alignment of the fibers performed at the GSFC.

Proceedings Article | 20 February 2015 Paper

Paper

Space qualification of the optical filter assemblies for the ICESat-2/ATLAS instrument

E. Troupaki, Z. Denny, S. Wu, H. Bradshaw, K. Smith, J. Hults, L. Ramos-Izquierdo, W. Cook

Proceedings Volume 9346, 93460H (2015) https://doi.org/10.1117/12.2077839

KEYWORDS: Fabry–Perot interferometers, Optical filters, Optical fabrication, Transmittance, Temperature metrology, Beam splitters, Sensors, Diffractive optical elements, Optical testing, Receivers

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Proceedings Article | 18 March 2013 Paper

Paper

A 16-beam non-scanning swath mapping laser altimeter instrument

A. Yu, M. Krainak, D. Harding, J. Abshire, X. Sun, L. Ramos-Izquierdo, J. Cavanaugh, S. Valett, T. Winkert, M. Plants, C. Kirchner, B. Kamamia, R. Faulkner, P. Dogoda, W. Hasselbrack, T. Filemyr

Proceedings Volume 8599, 85990P (2013) https://doi.org/10.1117/12.2005651

KEYWORDS: Sensors, Pulsed laser operation, Vegetation, LIDAR, Detector arrays, Airborne laser technology, Telescopes, Data acquisition, Transmitters, Receivers

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Proceedings Article | 24 October 2011 Paper

Paper

Development of the airborne lidar surface topography simulator

Anthony Yu, David Harding, Michael Krainak, James Abshire, Xiaoli Sun, John Cavanaugh, Susan Valett, Luis Ramos-Izquiedro, Tom Winkert, Michael Plants, Cynthia Kirchner, Brian Kamamia, William Hasselbrack, Timothy Filemyr

Proceedings Volume 8286, 828603 (2011) https://doi.org/10.1117/12.912564

KEYWORDS: LIDAR, Vegetation, Sensors, Pulsed laser operation, Detector arrays, Photodetectors, Earth sciences, Telescopes, Receivers, Device simulation

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Proceedings Article | 30 September 2011 Paper

Paper

Development effort of the airborne lidar simulator for the lidar surface topography (LIST) mission

Anthony Yu, Michael Krainak, David Harding, James Abshire, Xiaoli Sun, John Cavanaugh, Susan Valett, Luis Ramos-Izquierdo, Tom Winkert, Cynthia Kirchner, Michael Plants, Timothy Filemyr, Brian Kamamia, William Hasselbrack, Pete Dogoda

Proceedings Volume 8182, 818207 (2011) https://doi.org/10.1117/12.898545

KEYWORDS: LIDAR, Sensors, Photodetectors, Vegetation, Detector arrays, Laser systems engineering, Transmitters, Telescopes, Earth sciences, Pulsed laser operation

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Proceedings Article | 17 February 2010 Paper

Paper

Spaceborne laser instruments for high-resolution mapping

Anthony Yu, Michael Krainak, David Harding, James Abshire, Xiaoli Sun, Susan Valett, John Cavanaugh, Luis Ramos-Izquierdo

Proceedings Volume 7578, 757802 (2010) https://doi.org/10.1117/12.843191

KEYWORDS: Sensors, Avalanche photodetectors, Vegetation, LIDAR, Laser systems engineering, Transmitters, Laser applications, Earth sciences, Mercury (planet), Satellites

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Proceedings Article | 12 August 2009 Paper

Paper

Evaluation of the polarization properties of a Philips-type prism for the construction of imaging polarimeters

R. Fernandez-Borda, E. Waluschka, S. Pellicori, J. V. Martins, L. Ramos-Izquierdo, J. D. Cieslak, Patrick Thompson

Proceedings Volume 7461, 746113 (2009) https://doi.org/10.1117/12.829080

KEYWORDS: Polarization, Prisms, Polarimetry, Interfaces, Dielectric polarization, Optical coatings, Zemax, Sensors, Computer simulations, Human-machine interfaces

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Proceedings Article | 13 February 2009 Paper

Paper

Overview of space qualified solid state lasers development at NASA Goddard Space Flight Center

Anthony Yu, Steve Li, George Shaw, Antonios Seas, Mark Stephen, Elisavet Troupaki, Aleksey Vasilyev, Luis Ramos-Izquierdo, Alan Lukemier, William Mamakos, Anthony Melak, Jeff Guzek, Alberto Rosanova

Proceedings Volume 7193, 719305 (2009) https://doi.org/10.1117/12.814954

KEYWORDS: Transmitters, Laser development, Mars, Solid state lasers, Semiconductor lasers, Aerospace engineering, Pulsed laser operation, Mercury (planet), Planets, LIDAR

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Proceedings Article | 14 February 2008 Paper

Paper

The lunar orbiter laser altimeter (LOLA) laser transmitter

Anthony Yu, Anne Marie Novo-Gradac, George Shaw, Glenn Unger, Luis Ramos-Izquierdo, Alan Lukemire

Proceedings Volume 6871, 68710D (2008) https://doi.org/10.1117/12.779825

KEYWORDS: Transmitters, Semiconductor lasers, Beryllium, Oscillators, Beam expanders, Diffractive optical elements, Laser development, Laser processing, Pulsed laser operation, Space reconnaissance

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Proceedings Article | 3 May 2007 Paper

Paper

The lunar orbiter laser altimeter (LOLA) on NASA's Lunar Reconnaissance Orbiter (LRO) mission

Haris Riris, Xiaoli Sun, John Cavanaugh, Glenn Jackson, Luis Ramos-Izquierdo, David Smith, Maria Zuber

Proceedings Volume 6555, 65550I (2007) https://doi.org/10.1117/12.719266

KEYWORDS: Sensors, Receivers, Diffractive optical elements, Reflectivity, Ranging, Pulsed laser operation, Telescopes, Space operations, Optical fabrication, Reconnaissance

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Proceedings Article | 18 May 2006 Paper

Paper

Diffractive optics for Moon topography mapping

John Smith, Luis Ramos-Izquierdo, Andrew Stockham, Stan Scott

Proceedings Volume 6223, 622304 (2006) https://doi.org/10.1117/12.665539

KEYWORDS: Diffractive optical elements, Etching, Beam splitters, Diffraction, Prototyping, Beam shaping, Diffraction gratings, Silica, Semiconducting wafers, Calibration

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Proceedings Article | 16 September 2005 Paper

Paper

Design of a totally conductively cooled diode-pumped 2µm-laser amplifier

Bo Trieu, Jirong Yu, Mulugeta Petros, Luis Ramos-Izquierdo, Glenn Byron, Peck Sohn, Yingxin Bai, Songsheng Chen, Michael Kavaya, Upendra Singh

Proceedings Volume 5887, 58870M (2005) https://doi.org/10.1117/12.620823

KEYWORDS: Optical amplifiers, Head, Laser crystals, Diodes, Oscillators, Crystals, Semiconductor lasers, Transmitters, Thermal effects, Waveguides

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SPIE Journal Paper | 1 January 1991

Airborne lidar for profiling of surface topography

Jack Bufton, James Garvin, John Cavanaugh, Luis Ramos-Izquierdo, Thomas Clem, William Krabill

OE, Vol. 30, Issue 01, (January 1991) https://doi.org/10.1117/12.10.1117/12.55770

KEYWORDS: LIDAR, Global Positioning System, Pulsed laser operation, Receivers, Data acquisition, Electronics, Ranging, Sensors, Profiling, Semiconductor lasers

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Showing 5 of 16 publications

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