Effect of precipitation on the transmission of high power laser radiation

Peckhaus, Andreas; Hall, Thomas; Bierbrauer, Ute; Pargmann, Carsten; Duschek, Frank

doi:10.1117/12.2532735

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…22 Their results showed that taking forward scattering into account improves correlation between measurements and calculations based on the snow PSD. Peckhaus et al presented results on transmission of a high power 1 µm-laser through rain and snow, 23 and performed calculations based on hydrometeor characteristics from a laserdisdrometer. Nebuloni and Capsoni reported on experiments on FSO-link with a wavelength of 785 nm in falling snow.…”

Section: Falling Snowmentioning

confidence: 99%

Turbulence and transmission effects on laser beam propagation in the SWIR and LWIR bands

Rahm,

Kullander,

Björck

et al. 2023

Environmental Effects on Light Propagation and Adaptive Systems VI

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Results from comparative measurements of turbulence and transmission at laser wavelengths in the shortwave infrared (SWIR) and longwave infrared (LWIR) wavelength bands are presented. The experimental setup uses a dual band transmitter with coaxially aligned laser beams and a receiver based on a common collecting off-axis parabolic mirror to direct the radiation to the detectors. Measurement of turbulence was performed on one occasion and transmission was measured in two events with fog and one event with falling snow. The turbulence data is compared to optical wave simulations, and the transmission data is compared to Mie calculations based on aerosol and hydrometeor data. As expected, the received power scintillations caused by atmospheric turbulence are stronger in the SWIR band compared to the LWIR band. The measured transmission in fog and snow can be explained by the measured characteristics of the scattering medium. In fog, depending on the particle size distribution, higher transmission can be observed in either wavelength bands. In snow, on the other hand, it is shown that the transmission is higher in the SWIR band as an effect of forward scattering.

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Section: Falling Snowmentioning

confidence: 99%

Turbulence and transmission effects on laser beam propagation in the SWIR and LWIR bands

Rahm,

Kullander,

Björck

et al. 2023

Environmental Effects on Light Propagation and Adaptive Systems VI

View full text Add to dashboard Cite

show abstract

“…The development and refinement of equipment for precipitation measurements, e.g., disdrometers that perform in-situ measurements of hydrometeor size and velocity, [12][13][14][15] have opened up possibilities for detailed correlation of precipitation characteristics with laser transmission measurements. Examples of the use of knowledge of the PSD when investigating transmission in precipitation are Brazda and Fiser, 16 and Peckhaus et al 17 Brazda and Fiser investigated the impact of rain on an 850-nm FSO-link, and Peckhaus et al investigated the effect of rain and falling snow on a high power laser beam centered around 1 μm.…”

Section: Introductionmentioning

confidence: 99%

Laser attenuation in falling snow correlated with measurements of snow particle size distribution

2021

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We investigate transmission through falling snow using a 3D imaging lidar at 1.56-μm wavelength. The lidar is based on the time-correlated single-photon counting technique. Experimental transmission data are compared with Mie theory transmission calculations based on snow particle size distribution simultaneously measured with a laser disdrometer. The calculations were performed in two ways, using the Beer-Lambert approach where all radiation interacting with a hydrometeor is considered extinct and an approach that includes effects of the forward scattering. Comparison of these two methods shows that inclusion of the contribution from forward scattering gives better agreement between experiment and calculations than using extinction only. When comparing the results using scattering calculations with a curve fit approach based on precipitation rate, it is evident that both the Beer-Lambert approach and the forward scattering approach give a much better correlation between experiment and calculations than relying on precipitation rate, as measured with the disdrometer, only. © The Authors.Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Effect of precipitation on the transmission of high power laser radiation

Cited by 2 publications

References 8 publications

Turbulence and transmission effects on laser beam propagation in the SWIR and LWIR bands

Turbulence and transmission effects on laser beam propagation in the SWIR and LWIR bands

Laser attenuation in falling snow correlated with measurements of snow particle size distribution

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