Airborne 2-Micron Double Pulsed Direct Detection IPDA Lidar for Atmospheric CO<sub>2</sub>Measurement

Yu, Jirong; Petros, Mulugeta; Refaat, Tamer F.; Reithmaier, K.; Remus, Ruben; Singh, Upendra N.; Johnson, W.; Boyer, C.M.; Fay, James; Johnston, Susan; Murchison, Luke

doi:10.1051/epjconf/201611903004

Cited by 11 publications

(6 citation statements)

References 5 publications

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“…The figure presents the vertical integrated optical depth spectral profile for CO 2 and H 2 O around the CO 2 R30 line [1]. The optical depths were derived using HITRAN database for absorption line parameters, assuming Voigt profile, and the US standard atmosphere model for meteorological and molecular profiles [7]. The presented optical depth integration upper limit is based on 8 km airborne altitude, assuming a small aircraft such as the NASA B-200.…”

Section: Airborne Triple-pulse Ipda Techniquementioning

confidence: 99%

“…To achieve this objective, the operating wavelengths of the first, second and third pulses are set to 2050.5094, 2051.0590 and 2051.1915 nm, respectively, which are equivalent to 32, -6 and -16 GHz offsets for the R30 line center at 2050.967 nm. Transmitted energies of 50, 15 and 5 mJ for the first, second and third pulses, respectively, are projected [7].…”

Section: Airborne Triple-pulse Ipda Techniquementioning

confidence: 99%

“…The wavelength control unit generates the seeding of the 2-m triple-pulse laser with a required accuracy less than 1 MHz [7]. This unique wavelength control uses a single seed semiconductor laser at 2-m.…”

Section: Wavelength Controlmentioning

confidence: 99%

“…To address this technical issue, a 2-m triple-pulse IPDA is currently under development at NASA LaRC through continual support from the NASA Earth Science Technology Office (ESTO) [6]. This triple-pulse IPDA will allow simultaneous and independent measurement of H 2 O and CO 2 optical depths from an airborne platform [7]. This system is a technological update to the knowledge gathered through the 2-μm CO 2 double-pulse IPDA lidar system.…”

Section: Introductionmentioning

confidence: 99%

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Airborne lidar for simultaneous measurement of column CO₂ and water vapor in the atmosphere

et al. 2016

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The 2-micron wavelength region is suitable for atmospheric carbon dioxide (CO 2 ) measurements due to the existence of distinct absorption feathers for the gas at this particular wavelength. For more than 20 years, researchers at NASA Langley Research Center (LaRC) have developed several high-energy and high repetition rate 2-micron pulsed lasers. This paper will provide status and details of an airborne 2-micron triple-pulse integrated path differential absorption (IPDA) lidar. The development of this active optical remote sensing IPDA instrument is targeted for measuring both CO 2 and water vapor (H 2 O) in the atmosphere from an airborne platform. This presentation will focus on the advancement of the 2-micron triple-pulse IPDA lidar development. Updates on the state-of-the-art triple-pulse laser transmitter will be presented including the status of seed laser locking, wavelength control, receiver telescope, detection system and data acquisition. Future plans for the IPDA lidar system for ground integration, testing and flight validation will also be presented.

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Section: Airborne Triple-pulse Ipda Techniquementioning

confidence: 99%

Section: Airborne Triple-pulse Ipda Techniquementioning

confidence: 99%

Section: Wavelength Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Airborne lidar for simultaneous measurement of column CO₂ and water vapor in the atmosphere

et al. 2016

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“…Pulse solid-state lasers emitting at a 2 µm wavelength range with high peak power and pulse energy, which are in the eye-safe band and exhibit strong absorption in water and human tissue, will be especially promising for applications in medical diagnostics, surgery, material processing, and ranging [1][2][3][4][5][6][7]. Passively Q-switched (PQS) technology, where the Q-switched device consists of a saturated absorber (SA), is a low-cost, compact structure, and a convenient and effective way to achieve a pulse laser at a 2 µm wavelength range.…”

Section: Introductionmentioning

confidence: 99%

Passively Q-switched operation of a Tm:YAlO₃ laser with a BN saturable absorber mirror

Yang

Zhang

et al. 2019

Laser Phys. Lett.

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A passively Q-switched (PQS) Tm:YAlO3 (Tm:YAP) laser was perfectly implemented with boron nitride (BN) nanosheets as a saturable absorber mirror. In PQS mode, an average output power of 1.54 W with a pulse duration of 349 ns was achieved, corresponding to an optical–optical conversion efficiency of 5.78%. Also, a pulse peak power of 14.6 W was acquired with an output wavelength of 1937.40 nm from the PQS Tm:YAP laser, and the beam quality factors were measured to be and at a physical cavity of 27 mm.

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InfraredLIDARApplications in Atmospheric Monitoring

Orr

2017

Encyclopedia of Analytical Chemistry

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The acronym LIDAR stands for LIght Detection And Ranging, an optical analog of RADAR (RAdio Detection And Ranging). The conventional version of LIDAR requires a laser transmitter to launch short pulses of coherent light, which are scattered from atmospheric targets of interest back to an optical receiver, with a time delay that is determined by the range of the target. Optical phenomena in the Earth's atmosphere (e.g. Rayleigh scattering, Raman scattering, Mie scattering, refraction, and resonant absorption) contribute to the amplitude of optical signals returning to the receiver and their characteristic wavelength dependence allows us to measure the concentration and velocity distributions of different atmospheric molecules and aerosol particles. LIDAR backscattering in the infrared (IR) region, on which this article concentrates, is well suited to detecting aerosols (as in clouds or industrial particulate emissions). IR DIAL (DIfferential Absorption Lidar), a variant in which two or more wavelengths are used simultaneously to separate resonant molecular signals from background, enables many molecular species to be monitored by means of their IR absorption spectra. Closely related approaches comprise long‐path IR laser absorption and IPDA (Integrated Path Differential Absorption), with retroreflection from a topographic target (e.g. a strategically located mirror or a hard target, such as the ground in air‐borne applications); these approaches sacrifice optical range information but gain sensitivity because they integrate over all molecules in the optical column between the transmitter/receiver and the reflector or hard target. All of these techniques are vitally dependent on pulsed IR laser technology.

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Airborne 2-Micron Double Pulsed Direct Detection IPDA Lidar for Atmospheric CO₂Measurement

Cited by 11 publications

References 5 publications

Airborne lidar for simultaneous measurement of column CO₂ and water vapor in the atmosphere

Airborne lidar for simultaneous measurement of column CO₂ and water vapor in the atmosphere

Passively Q-switched operation of a Tm:YAlO₃ laser with a BN saturable absorber mirror

InfraredLIDARApplications in Atmospheric Monitoring

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Airborne 2-Micron Double Pulsed Direct Detection IPDA Lidar for Atmospheric CO2Measurement

Cited by 11 publications

References 5 publications

Airborne lidar for simultaneous measurement of column CO2 and water vapor in the atmosphere

Airborne lidar for simultaneous measurement of column CO2 and water vapor in the atmosphere

Passively Q-switched operation of a Tm:YAlO3 laser with a BN saturable absorber mirror

InfraredLIDARApplications in Atmospheric Monitoring

Contact Info

Product

Resources

About

Airborne 2-Micron Double Pulsed Direct Detection IPDA Lidar for Atmospheric CO₂Measurement

Airborne lidar for simultaneous measurement of column CO₂ and water vapor in the atmosphere

Airborne lidar for simultaneous measurement of column CO₂ and water vapor in the atmosphere

Passively Q-switched operation of a Tm:YAlO₃ laser with a BN saturable absorber mirror