scholarly journals High-energy, 2µm laser transmitter for coherent wind LIDAR

2017 ◽  
Author(s):  
Upendra N. Singh ◽  
Jirong Yu ◽  
Grady J. Koch ◽  
Michael J. Kavaya
Keyword(s):  
High Energy ◽  
Wind Lidar ◽  
Laser Transmitter

The Doppler Aerosol Wind (DAWN) Airborne, Wind-Profiling Coherent-Detection Lidar System: Overview and Preliminary Flight Results

2014 ◽  
Vol 31 (4) ◽  
pp. 826-842 ◽  
Author(s):  
Michael J. Kavaya ◽  
Jeffrey Y. Beyon ◽  
Grady J. Koch ◽  
Mulugeta Petros ◽  
Paul J. Petzar ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Energy ◽  
Coherent Detection ◽  
Lidar System ◽  
Airborne Measurements ◽  
Secondary Mirror ◽  
Wind Measurements ◽  
Wind Lidar ◽  
Aerosol Backscatter ◽  
Flight Measurements

Abstract The first airborne wind measurements of a pulsed, 2-μm solid-state, high-energy, wind-profiling lidar system for airborne measurements are presented. The laser pulse energy is the highest to date in an eye-safe airborne wind lidar system. This energy, the 10-Hz laser pulse rate, the 15-cm receiver diameter, and dual-balanced coherent detection together have the potential to provide much-improved lidar sensitivity to low aerosol backscatter levels compared to earlier airborne-pulsed coherent lidar wind systems. Problems with a laser-burned telescope secondary mirror prevented a full demonstration of the lidar’s capability, but the hardware, algorithms, and software were nevertheless all validated. A lidar description, relevant theory, and preliminary results of flight measurements are presented.

A design strategy for a high-energy Tm,Ho: YLF laser transmitter

2014 ◽  
Author(s):  
Atsushi Sato ◽  
Kazuhiro Asai ◽  
Yoshiki Miyake ◽  
Shoken Ishii ◽  
Kohei Mizutani ◽  
...  
Keyword(s):  
Design Strategy ◽  
High Energy ◽  
Laser Transmitter

scholarly journals Advances in high-energy solid-state 2-micron laser transmitter development for ground and airborne wind and CO 2 measurements

2010 ◽  
Author(s):  
Upendra N. Singh ◽  
Jirong Yu ◽  
Mulugeta Petros ◽  
Songsheng Chen ◽  
Michael J. Kavaya ◽  
...  
Keyword(s):  
Solid State ◽  
High Energy ◽  
Laser Transmitter

Two diode lasers with different wavelengths resonantly pumped Er:YAG ceramic single-frequency laser

2020 ◽  
Author(s):  
Lei Wang ◽  
Yefei Mao ◽  
Miaomiao Lin ◽  
Fengrui Zhang
Keyword(s):  
Single Crystals ◽  
Diode Lasers ◽  
Ceramic Materials ◽  
High Energy ◽  
Output Energy ◽  
Single Frequency ◽  
Seed Laser ◽  
Wind Lidar ◽  
Frequency Laser ◽  
Frequency Pulse

<p>Single-frequency solid-state lasers have important applications in laser remote sensing, such as Doppler lidar, differential absorption lidar (DIAL), gravitational wave detection and so on. In recent ten years, highly stable and narrow spectrum single-frequency Q-switched 1.6 μm lasers are widely applied in coherent Doppler wind detection liar and CH<sub>4</sub> DIAL. For applications in space-based wind lidar and DIAL, high output energy of the lasers is essential. In order to obtain a single-frequency laser with high energy, a common method is to inject a stable single-frequency seed laser into a high-energy Q-switched slave laser. Energy upconversion is the main factor which affects the energy enhancement of Er:YAG laser at 1.6μm. We report a Er:YAG ceramic single-frequency pulsed laser at 1645nm dual-end-pumped by two diode lasers with different wavelengths. Compared to a laser pumped by the two same wavelength diode lasers, the laser has higher slope efficiency because the energy upconversion is weakened. Otherwise, ceramic materials have many advantages compared with single crystals, such as ease of fabrication large-size ceramic material, short fabrication time, low cost and good thermo-mechanical properties. Uniform dopant can be realized in ceramic materials, which are much tougher and stronger than single crystals. All the advantages of ceramic materials mentioned above contribute to scalability to high energy laser. In this letter, we report a single frequency pulse ceramic laser with output energy of more than 10 mJ and pulse-width of more than 150 ns at a repetition rate of 500 Hz, which is pumped by two diode lasers with the wavelengths of 1470 nm and 1532 nm, respectively. This single-frequency pulse laser is a potential candidate as a seed laser for a slab laser amplifier system, which is an ideal source for space-based DIAL and Doppler wind lidar.</p>

2.5 MHz line-width high-energy, 2μm coherent wind lidar transmitter

2007 ◽  
Author(s):  
Mulugeta Petrosa ◽  
Jirong Yu ◽  
Bo Trieu ◽  
Yingxin Bai ◽  
Paul Petzar ◽  
...  
Keyword(s):  
Line Width ◽  
High Energy ◽  
Wind Lidar

Development of a TRL-5 conductively-cooled 2-micron laser transmitter for coherent doppler wind lidar system

2013 ◽  
Author(s):  
Timothy Shuman ◽  
Floyd E. Hovis ◽  
Upendra N. Singh ◽  
Mulugeta Petros ◽  
Jirong Yu ◽  
...  
Keyword(s):  
Lidar System ◽  
Wind Lidar ◽  
Laser Transmitter ◽  
Doppler Wind Lidar

scholarly journals ESA’s Space-Based Doppler Wind Lidar Mission Aeolus – First Wind and Aerosol Product Assessment Results

2020 ◽  
Vol 237 ◽  
pp. 01007 ◽  
Author(s):  
A.G. Straume ◽  
M. Rennie ◽  
L. Isaksen ◽  
J. de Kloe ◽  
G.-J. Marseille ◽  
...  
Keyword(s):  
Optical Properties ◽  
Data Processing ◽  
Positive Impact ◽  
Weather Prediction ◽  
European Space Agency ◽  
High Energy ◽  
Energy Output ◽  
Random Errors ◽  
Wind Lidar ◽  
Doppler Wind Lidar

The European Space Agency (ESA) wind mission, Aeolus, hosts the first space-based Doppler Wind Lidar (DWL) world-wide. The primary mission objective is to demonstrate the DWL technique for measuring wind profiles from space, intended for assimilation in Numerical Weather Prediction (NWP) models. The wind observations will also be used to advance atmospheric dynamics research and for evaluation of climate models. Mission spin-off products are profiles of cloud and aerosol optical properties. Aeolus was launched on 22 August 2018, and the Atmospheric LAser Doppler INstrument (Aladin) instrument switch-on was completed with first high energy output in wind mode on 4 September 2018 [1], [2]. The on-ground data processing facility worked excellent, allowing L2 product output in near-real-time from the start of the mission. First results from the wind profile product (L2B) assessment show that the winds are of very high quality, with random errors in the free Troposphere within (cloud/aerosol backscatter winds: 2.1 m/s) and larger (molecular backscatter winds: 4.3 m/s) than the requirements (2.5 m/s), but still allowing significant positive impact in first preliminary NWP impact experiments. The higher than expected random errors at the time of writing are amongst others due to a lower instrument out-and input photon budget than designed. The instrument calibration is working well, and some of the data processing steps are currently being refined to allow to fully correct instrument alignment related drifts and elevated detector dark currents causing biases in the first data product version. The optical properties spin-off product (L2A) is being compared e.g. to NWP model clouds, air quality model forecasts, and collocated ground-based observations. Features including optically thick and thin particle and hydrometeor layers are clearly identified and are being validated.

Laser transmitter study for spaceborne Doppler wind lidar

1995 ◽  
Author(s):  
Steven Wallace ◽  
Paul M. Schwarzenberger ◽  
B. A. Grant
Keyword(s):  
Wind Lidar ◽  
Laser Transmitter ◽  
Doppler Wind Lidar
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