Rugged diode-pumped Alexandrite laser as an emitter in a compact mobile lidar system for atmospheric measurements

Munk, Alexander; Strotkamp, Michael; Jungbluth, Bernd; Froh, Jan; Mense, Thorben; Mauer, Alsu; Höffner, J.

doi:10.1364/ao.422634

Cited by 16 publications

(2 citation statements)

References 40 publications

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“…Layer 2 contains parts of the optical setup, like the seeding laser, the diode pump and a fibre resonator for reference, as well as the compact detection bench with its two avalanche photodiode (APD) detectors and stabilised filters. Layer 3 houses the emission part, with the biggest part being the diode-pumped Alexandrite ring laser, which was specially designed in close collaboration with the Fraunhofer Institute for Laser Technology in Aachen (Munk et al, 2021).…”

Section: The Lidar Core Unitmentioning

confidence: 99%

First measurements of 3-Dimensional winds up to 25 km based on Aerosol backscatter using a compact Doppler lidar with multiple fields of view

Mense,

Höffner,

Baumgarten

et al. 2023

Preprint

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Abstract. We present the first measurements of simultaneous horizontal and vertical winds using a new VAHCOLI lidar system developed at the Leibniz Institute for Atmospheric Physics in Kühlungsborn, Germany (54.12° N, 11.77° E). We describe the technical details of a multi-field-of-view (MFOV) upgrade, which allows to measure wind dynamics in the transition region from microscale to mesoscale (103−104 m). The method was applied at the edge of a developing high-pressure region. Comparisons between the lidar measurements and data from ECMWF show excellent agreement for the horizontal wind components, better than 0.30 ± 0.36 m s−1 along the north beam of the lidar and −0.93 ± 0.73 m s−1 along the south beam. Measurements of vertical wind show significant underestimation of this component by ECMWF. Comparison to ADM-Aeolus shows good agreement, better than −0.12 ± 3.31 m s−1. The capability of the MFOV lidar to explore small-scale asymmetries in the wind field is shown by comparison of the north and south field of view, where we observe a wind asymmetry in the meridional winds, which is also present in ECMWF but underestimated by a factor of approximately four.

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Section: The Lidar Core Unitmentioning

confidence: 99%

First measurements of 3-Dimensional winds up to 25 km based on Aerosol backscatter using a compact Doppler lidar with multiple fields of view

Mense,

Höffner,

Baumgarten

et al. 2023

Preprint

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show abstract

“…Figure 2 shows the unique key components included on the lidar platform: a novel diode-pumped alexandrite ring laser and a receiver with matched interferometer. The diode-pumped alexandrite laser [6,7] is a cooperative development with the ILT and is tunable in a wide wavelength range of around 700-800 nm. The optical system includes a saturation spectroscopy to stabilize the laser wavelength on the potassium resonance line at 770 nm.…”

Section: Universial Lidar Platformmentioning

confidence: 99%

Aerosol measurements in the tropo- and stratosphere by spectral splitting of Rayleigh and Mie signals within a compact lidar of 1 m3

Froh

Höffner

Mauer

et al. 2022

Remote Sensing of Clouds and the Atmosphere XXVII

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Doppler lidars with daylight capability are challenging systems because of the small field of view (FOV), spectral filtering, and other additional subsystems required compared to observations at night. A universal Doppler lidar platform with all the required technologies for automatic operation is assembled. By combining a novel narrow-bandwidth pulsed laser (FWHM ~3 MHz) and a matched interferometer (FWHM ~7.5 MHz) the backscattered signals from molecules and aerosols are separated into two channels within the receiver. By tuning the frequency of the pulsed laser from pulse to pulse with sub-MHz accuracy relative to the interferometer, Doppler-aerosol measurements with largely reduced Rayleigh-signal allow aerosol measurements from ground to ~25 km altitude, including Doppler-wind measurements from the Doppler-shift. The compact lidar (1m 3 ) is built for automatic 24/7 operation and comprises a novel diodepumped alexandrite ring-laser, a 50 cm-telescope and a receiver for solar background free aerosol measurements. The combination of cost-efficient design and fast assembling of such a system allows the construction of a Doppler lidar network with identical units. Such a network can address a wide range of horizontal and vertical scales.

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Power-scaled CW Alexandrite lasers

Tawy

Minassian²,

Damzen

2023

Appl. Phys. B

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We present several strategies for increasing the output laser power of near-diffraction limited continuous-wave Alexandrite lasers pumped by fibre-coupled red laser diodes. Laser mode size control using a convex mirror with the varying thermal lens is shown to be an efficient method for generating record levels of output power from a diode-pumped Alexandrite laser. 8.6 W is obtained with $$M^{2}<1.1$$ M 2 < 1.1 and an optical efficiency of 27%. 735–790 nm wavelength tuning is demonstrated with $$> {2.5}\,\hbox {W}$$ > 2.5 W and a record dual-wavelength output power of 4.2 W. In a ring-cavity geometry, 5.1 W is obtained with $$M^{2}<1.1$$ M 2 < 1.1 showing promising potential for multi-watt single-longitudinal-mode operation. Detailed laser cavity modelling including thermal lens analysis is also provided.

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Rugged diode-pumped Alexandrite laser as an emitter in a compact mobile lidar system for atmospheric measurements

Abstract: We present design and performance data of two diode-pumped Alexandrite lasers developed explicitly as laser emitters in mobile potassium resonance lidar systems. The lasers yield an output power of up to 1.75 mJ at a repetition rate of 500 Hz with a beam quality of M 2 < Show more

Cited by 16 publications

References 40 publications

First measurements of 3-Dimensional winds up to 25 km based on Aerosol backscatter using a compact Doppler lidar with multiple fields of view

First measurements of 3-Dimensional winds up to 25 km based on Aerosol backscatter using a compact Doppler lidar with multiple fields of view

Aerosol measurements in the tropo- and stratosphere by spectral splitting of Rayleigh and Mie signals within a compact lidar of 1 m3

Power-scaled CW Alexandrite lasers

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