A5014016332- Solid State Laser Technologies
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Laser Design and Applications
- Advanced Fiber Laser Technologies
- Meteorological Phenomena and Simulations
- Spectroscopy and Laser Applications
- Photorefractive and Nonlinear Optics
- Atmospheric chemistry and aerosols
- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Photonic and Optical Devices
- Aeolian processes and effects
- Atmospheric Ozone and Climate
- Optical properties and cooling technologies in crystalline materials
- Crystal Structures and Properties
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Ocular and Laser Science Research
- Semiconductor Lasers and Optical Devices
- Astronomy and Astrophysical Research
- Mineralogy and Gemology Studies
- Photonic Crystal and Fiber Optics
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2016-2024
Technische Universität Berlin
2012-2021
Czech Academy of Sciences, Institute of Atmospheric Physics
2019
Macquarie University
2015-2017
Abstract The North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX) explored the impact of diabatic processes on disturbances jet stream their influence downstream high-impact weather through deployment four research aircraft, each with a sophisticated set remote sensing in situ instruments, coordinated suite ground-based measurements. A total 49 flights were performed, including, for first time, aircraft: German High Altitude Long Range Research Aircraft (HALO), Deutsches...
Abstract. Shortly after the successful launch of European Space Agency's wind mission Aeolus, co-located airborne lidar observations were performed in central Europe; these employed a prototype satellite instrument – ALADIN (Atmospheric LAser Doppler INstrument) Airborne Demonstrator (A2D). Like direct-detection on-board A2D is composed frequency-stabilized ultra-violet (UV) laser, Cassegrain telescope and dual-channel receiver to measure line-of-sight (LOS) speeds by analysing both Mie...
Abstract. Soon after the launch of Aeolus on 22 August 2018, first ever wind lidar in space developed by European Space Agency (ESA) has been providing profiles component vector along instrument's line sight (LOS) a global scale. In order to validate quality observations, German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt e.V., DLR) recently performed two airborne campaigns over central Europe deploying different Doppler lidars (DWLs) board DLR Falcon aircraft. The campaign –...
Soon after its successful launch in August 2018, the spaceborne wind lidar ALADIN (Atmospheric LAser Doppler INstrument) on-board ESA’s Earth Explorer satellite Aeolus has demonstrated to provide atmospheric profiles on a global scale. Being first ever Wind Lidar (DWL) instrument space, contributes improvement numerical weather prediction (NWP) by measuring one component of horizontal vector. The performance was assessed team from ESA, DLR, industry, and NWP centers during months operation....
The European Space Agency (ESA) wind mission, Aeolus, hosts the first space-based Doppler Wind Lidar (DWL) world-wide. primary mission objective is to demonstrate DWL technique for measuring profiles from space, intended assimilation in Numerical Weather Prediction (NWP) models. observations will also be used advance atmospheric dynamics research and evaluation of climate Mission spin-off products are cloud aerosol optical properties. Aeolus was launched on 22 August 2018, Atmospheric LAser...
Global acquisition of atmospheric wind profiles using a spaceborne direct-detection Doppler lidar is being accomplished following the launch European Space Agency's Aeolus mission. One key part instrument single-frequency, ultraviolet laser that emits nanosecond pulses into atmosphere. High output energy and frequency stability ensure sufficient signal-to-noise ratio backscatter return an accurate determination shift induced by wind. This Letter discusses design transmitter for first in...
Laser gain materials possessing high thermal conductivity and robust mechanical properties are key prerequisites for power lasers. We show that diamond, when configured as a Raman laser, enables access to these other extreme properties, providing an important new route brightness beam generation. Recent achievements in pulsed continuous wave oscillators, combining amplifiers, single longitudinal mode oscillators summarized, along with wavelength extension of concepts through adaption pumps,...
A fundamental advantage of lasers is their ability to produce a large number photons in single optical mode, yet this achieved only minor fraction devices due the instability mechanism called spatial hole burning. Here, we exploit burning free nature stimulated scattering gain medium demonstrate longitudinal mode (SLM) operation generic standing wave cavity. continuous diamond Raman oscillator with multi-Watt-level output power and frequency stability 80 MHz demonstrated without use...
Abstract. In preparation of the satellite mission Aeolus carried out by European Space Agency, airborne wind lidar observations have been performed in frame North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX), employing prototype instrument, ALADIN Airborne Demonstrator (A2D). The direct-detection Doppler system is composed a frequency-stabilized Nd:YAG laser operating at 355 nm, Cassegrain telescope dual-channel receiver. latter incorporates Fizeau interferometer two...
Abstract. The acquisition of atmospheric wind profiles on a global scale was realized by the launch Aeolus satellite, carrying unique Atmospheric LAser Doppler INstrument (ALADIN), first lidar in space. One major component ALADIN is its high-power, ultraviolet (UV) laser transmitter, which based an injection-seeded, frequency-tripled Nd:YAG and fulfills set demanding requirements terms pulse energy, length, repetition rate, spatial spectral beam properties. In particular, frequency stability...
Abstract. During the first 3 years of European Space Agency's Aeolus mission, German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars (DWL) on board DLR Falcon aircraft, aiming to validate quality recent Level 2B (L2B) data product (processor baseline 11 and 12). The campaigns, WindVal III (November–December 2018) AVATAR-E (Aeolus Validation Through Airborne Lidars in Europe, May June 2019), were...
Abstract. The realization of the European Space Agency's Aeolus mission was supported by long-standing development and field deployment Atmospheric LAser Doppler INstrument (ALADIN) Airborne Demonstrator (A2D) which, since launch satellite in 2018, has been serving as a key instrument for validation ALADIN, first-ever wind lidar (DWL) space. However, capabilities A2D are compromised deficiencies dual-channel receiver like its spaceborne counterpart, consists Rayleigh complementary Mie...
We report a narrowband and tunable diamond Raman laser generating eye-safe radiation suitable for water vapor detection. Frequency conversion of pump operating from 1063 to 1066 nm the second order Stokes component in an external standing-wave cavity yielded 7 W multimode output power wavelength range 1483 1488 at efficiency 21%. Stable single longitudinal mode operation was achieved over whole tuning low (0.1 W), whereas incorporation volume Bragg grating as coupler enabled much higher...
We report on the design and performance of laser deployed in airborne demonstrator Doppler wind lidar for Aeolus mission European Space Agency (ESA). The all-solid-state, diode-pumped frequency-tripled Nd:YAG is realized as a master oscillator power amplifier (MOPA) system, generating 60 mJ single-frequency pulses at 355 nm wavelength, 50 Hz repetition rate 20 ns pulse duration. For measurement frequency shift over several accumulated shots, stability crucial importance. Injection-seeding,...
The Aeolus satellite mission of the European Space Agency (ESA) has brought first wind LiDAR to space satisfy long-existing need for global profile observations. Until successful launch on 22 August 2018, pre-launch campaign activities supported validation measurement principle, instrument calibration, and optimization retrieval algorithms. Therefore, an airborne prototype been developed, ALADIN Airborne Demonstrator (A2D), with being Atmospheric Laser Doppler Instrument Aeolus. Two...
We report continuous-wave beam conversion from 1.06 to 1.49 µm in a diamond Raman laser operating on the second Stokes shift. High power (114 W) and high efficiency (44%) is achieved using single cavity that highly resonant at first wavelength but has output coupling (89%). An analytical model was developed for external-cavity lasers steady-state, revealing optimization of markedly different there direct proportional relationship between pump depletion diamond, which we have confirmed by...
Abstract. Soon after the launch of Aeolus on 22 August 2018, first ever wind lidar in space developed by European Space Agency (ESA) has been providing profiles component vector along instrument's line-of-sight (LOS) a global scale. In order to validate quality observations, German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt e.V., DLR) recently performed two airborne campaigns over Central Europe deploying different Doppler lidars (DWL) on-board DLR Falcon aircraft. The...
Abstract. Since the start of European Space Agency's Aeolus mission in 2018, various studies were dedicated to evaluation its wind data quality and particularly determination systematic random errors Rayleigh-clear Mie-cloudy results provided Level-2B (L2B) product. The control (QC) schemes applied analyses mostly rely on estimated error (EE), reported L2B data, using different often subjectively chosen thresholds for rejecting outliers, thus hampering comparability validation studies. This...
Abstract. This paper presents an extensive investigation of the signal fringe profile for Fizeau interferometer used in first spaceborne wind lidar Aeolus and considers fundamental implications measurement accuracy future systems. The early design phase considered that basic would be made up a instrumental component ≈100 MHz (full width at half maximum, FWHM), folded with laser pulse spectral ≈50 (FWHM), both Lorentzian form. Fringe anomalies observed before mission related to surface...
A pulsed Er:YAG laser with resonant in-band diode pumping was demonstrated. Laser pulses 6.6 mJ energy and 50 ns pulse duration were generated. With an intra-cavity etalon a broad wavelength tuning range from 1643.47 to 1646.78 nm obtained. stable dual-wavelength operation observed by fine of the etalons. The separation two wavelengths 0.78 nm. One them located within methane absorption line other off line. frequency stability narrow linewidth less than 40 MHz. It is very compact source for...
Abstract. In August 2018, the European Space Agency (ESA) launched first Doppler wind lidar into space, which has since then been providing continuous profiles of horizontal line-of-sight component at a global scale. Aeolus data have successfully assimilated several numerical weather prediction (NWP) models and demonstrated positive impact on quality forecasts. To provide valuable input for NWP models, detailed characterization instrumental performance as well realization minimization...
We report on the development of compact and frequency-stable Er:YAG laser systems emitting in eye-safe spectral region. Resonant cw diode pumping provides 4.5 W output power operation 2.2 mJ Q-switched with pulse duration about 140 ns. The application intra-cavity etalons allows for wavelength tuning from 1645.22 to 1646.33 nm while frequency stability accounts less than 50 MHz. potential erbium sources terms methane detection was evaluated under laboratory conditions by absorption...
We report a novel cavity feedback mechanism for stabilizing single-longitudinalmode (SLM) operation of diamond Raman lasers.Polarization-dependent gain and in-grown stress birefringence in were investigated as sources Hänsch-Couillaud-type locking signals.The power range SLM increased from 2.1 W to 7.2 W, compared the free-running laser, simple standing-wave laser without frequency-selective elements.Methods further increasing frequency stability are discussed.