Experimental analysis of a laser beam propagating in angular turbulence
In this work, a Gaussian laser beam is propagated through a thermally turbulent region before passing through a point diffraction interferometer to produce a circular interferogram. This was done to ascertain how turbulent windstreams of various wind speeds and temperatures affect a laser beam when...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-05-01
|
| Series: | Open Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/phys-2022-0038 |
| _version_ | 1797998574881996800 |
|---|---|
| author | Enoch Gareth Daniel Chetty Naven |
| author_facet | Enoch Gareth Daniel Chetty Naven |
| author_sort | Enoch Gareth Daniel |
| collection | DOAJ |
| description | In this work, a Gaussian laser beam is propagated through a thermally turbulent region before passing through a point diffraction interferometer to produce a circular interferogram. This was done to ascertain how turbulent windstreams of various wind speeds and temperatures affect a laser beam when directed at different angles to the beam axis. The interferometric results portray a clear dependence on the angle of application. That is, deviations away from 90° result in increased wavefront fluctuations. The refractive index structure constant, Rytov variance, and Fried’s parameter were computed to quantify each turbulent model. The attributed strength regimes of these atmospheric parameters were in varying degrees of agreement with the interferometric data. These contradictions and resulting conclusions were discussed in full. |
| first_indexed | 2024-04-11T10:50:53Z |
| format | Article |
| id | doaj.art-4954980d5f504273a98d720f368cb382 |
| institution | Directory Open Access Journal |
| issn | 2391-5471 |
| language | English |
| last_indexed | 2024-04-11T10:50:53Z |
| publishDate | 2022-05-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Physics |
| spelling | doaj.art-4954980d5f504273a98d720f368cb3822022-12-22T04:28:54ZengDe GruyterOpen Physics2391-54712022-05-0120140241510.1515/phys-2022-0038Experimental analysis of a laser beam propagating in angular turbulenceEnoch Gareth Daniel0Chetty Naven1School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, 3209, South AfricaSchool of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, 3209, South AfricaIn this work, a Gaussian laser beam is propagated through a thermally turbulent region before passing through a point diffraction interferometer to produce a circular interferogram. This was done to ascertain how turbulent windstreams of various wind speeds and temperatures affect a laser beam when directed at different angles to the beam axis. The interferometric results portray a clear dependence on the angle of application. That is, deviations away from 90° result in increased wavefront fluctuations. The refractive index structure constant, Rytov variance, and Fried’s parameter were computed to quantify each turbulent model. The attributed strength regimes of these atmospheric parameters were in varying degrees of agreement with the interferometric data. These contradictions and resulting conclusions were discussed in full.https://doi.org/10.1515/phys-2022-0038turbulencegaussian laser beampoint diffraction interferometerrefractive index structure constantrytov variancefried’s parameter |
| spellingShingle | Enoch Gareth Daniel Chetty Naven Experimental analysis of a laser beam propagating in angular turbulence Open Physics turbulence gaussian laser beam point diffraction interferometer refractive index structure constant rytov variance fried’s parameter |
| title | Experimental analysis of a laser beam propagating in angular turbulence |
| title_full | Experimental analysis of a laser beam propagating in angular turbulence |
| title_fullStr | Experimental analysis of a laser beam propagating in angular turbulence |
| title_full_unstemmed | Experimental analysis of a laser beam propagating in angular turbulence |
| title_short | Experimental analysis of a laser beam propagating in angular turbulence |
| title_sort | experimental analysis of a laser beam propagating in angular turbulence |
| topic | turbulence gaussian laser beam point diffraction interferometer refractive index structure constant rytov variance fried’s parameter |
| url | https://doi.org/10.1515/phys-2022-0038 |
| work_keys_str_mv | AT enochgarethdaniel experimentalanalysisofalaserbeampropagatinginangularturbulence AT chettynaven experimentalanalysisofalaserbeampropagatinginangularturbulence |