Methane optical density measurements with an integrated path differential absorption lidar from an airborne platform

Riris, Haris; Numata, Kenji; Wu, Shuying; Gonzalez, Brayler; Rodriguez, Michael; Scott, Stan; Kawa, S. R.; Mao, Jianping

doi:10.1117/1.jrs.11.034001

Cited by 24 publications

(11 citation statements)

References 53 publications

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“…The cavities are locked to the incoming laser frequency by the Pound-Drever-Hall method (Drever et al, 1983). Figure 12 shows experimental absolute frequency-locking performance demonstrated by our prototype system (Numata et al, 2011;Riris et al, 2017;Abshire et al, 2018). It has achieved <5 MHz drift over >24 hours, satisfying the <40 MHz requirement for <2K temperature measurement accuracy.…”

Section: Laser Optics Module (Lom)mentioning

confidence: 89%

The Atmospheric Coupling and Dynamics Across the Mesopause (ACaDAMe) mission

Janches

Krainak

et al. 2019

Advances in Space Research

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The Atmospheric Coupling and Dynamics Across the Mesopause (ACaDAMe) is a mission designed to uniquely address critical questions involving multi-scale wave dynamics at key space weather (SWx) "gateway altitudes" of the mesosphere and lower thermosphere (MLT) at ∼70-150 km. ACaDAMe observes with a nadir-pointing resonant lidar that utilizes the fluorescence of atomic Na present in the MLT. By tuning a laser to the Na absorption wavelength (589 nm), ACaDAMe would perform very high resolution measurements of temperature and Na densities across the mesopause during both day and night. In this manner, Na is used as tracer for observing and characterizing MLT waves generated by tropospheric weather that represent the dominant terrestrial source of energy and momentum affecting space weather and transport of mesospheric species.

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Section: Laser Optics Module (Lom)mentioning

confidence: 89%

The Atmospheric Coupling and Dynamics Across the Mesopause (ACaDAMe) mission

Janches

Krainak

et al. 2019

Advances in Space Research

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“…The remaining design details of our instrument and results of our airborne demonstration were summarized in a recent publication. 47…”

Section: Gsfc Measurement Approachmentioning

confidence: 99%

The challenges of measuring methane from space with a lidar

Riris

Numata

et al. 2019

International Conference on Space Optics — ICSO 2018

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The global and regional quantification of methane fluxes and identification of its sources and sinks has been highlighted as one of the goals of the NASA 2017 Earth Science Decadal Survey. Detecting methane from space and airborne platforms with an active (laser) remote sensing instrument presents several unique technology and measurement challenges. The instrument must have a single frequency, narrow-linewidth light source, and photon-sensitive detector at the right spectral region to make continuous measurements from orbit, day and night, all seasons and at all latitudes. It must have a high signal to noise ratio and must be relatively immune to biases from aerosol/cloud scattering, spectroscopic and meteorological data uncertainties, and instrument systematic errors. At Goddard Space Flight Center (GSFC), in collaboration with industry, we have developed an airborne instrument to measure methane. Our instrument is a nadir-viewing lidar that uses Integrated Path Differential Absorption (IPDA), to measure methane near 1.65 µm. We sample the absorption line using multiple wavelengths from a narrow linewidth laser source and a sensitive photodetector. This measurement approach provides maximum information content about the CH4 column, and minimizes biases in the XCH4 retrieval. In this paper, we will review our progress to date and discuss the technology challenges, options and tradeoffs to measure methane from space and airborne platforms.

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“…Most of the developed for space applications [31,32]. It also opens the path for generic architectures that could be transferred from one spectral window to another while keeping the same core components [29,30] or for multiple wavelength approaches [12,21]. Following this path, the Nested Cavity Optical Parametric Oscillator (NesCOPO) based master-oscillator power amplifier (MOPA) architecture has been developed at Onera as an injection-seeding-free laser transmitter with wide spectral coverage capability.…”

Section: Introductionmentioning

confidence: 99%

High Energy Parametric Laser Source and Frequency-Comb-Based Wavelength Reference for CO2 and Water Vapor DIAL in the 2 µm Region: Design and Pre-Development Experimentations

et al. 2021

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We present a differential absorption lidar (DIAL) laser transmitter concept designed around a Nested Cavity Optical Parametric Oscillator (NesCOPO) based Master Oscillator Power Amplifier (MOPA). The spectral bands are located around 2051 nm for CO2 probing and 1982 nm for H216O and HD16O water vapor isotopes. This laser is aimed at being integrated into an airborne lidar, intended to demonstrate future spaceborne instrument characteristics: high-energy (several tens of mJ nanosecond pulses) and high optical frequency stability (less than a few hundreds of kHz long term drift). For integration and efficiency purposes, the proposed design is oriented toward the use of state-of-the-art high aperture periodically poled nonlinear materials. This approach is supported by numerical calculations and preliminary experimental validations, showing that it is possible to achieve energies in the 40–50 mJ range, reaching the requirement levels for spaceborne Integrated Path Differential Absorption (IPDA) measurements. We also propose a frequency referencing technique based on beat note measurement of the laser signal with a self-stabilized optical frequency comb, which is expected to enable frequency measurement precisions better than a few 100 kHz over tens of seconds integration time, and will then be used to feed the cavity locking of the NesCOPO.

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Methane optical density measurements with an integrated path differential absorption lidar from an airborne platform

Cited by 24 publications

References 53 publications

The Atmospheric Coupling and Dynamics Across the Mesopause (ACaDAMe) mission

The Atmospheric Coupling and Dynamics Across the Mesopause (ACaDAMe) mission

The challenges of measuring methane from space with a lidar

High Energy Parametric Laser Source and Frequency-Comb-Based Wavelength Reference for CO2 and Water Vapor DIAL in the 2 µm Region: Design and Pre-Development Experimentations

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