Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel
An important step in the design of receiver aperture and optimal spacing of the diversity scheme for an underwater laser communication system is to accurately characterize the two-dimensional (2D) spatial distribution of laser beam intensity. In this paper, the 2D optical intensity distribution and...
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| Format: | Article |
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MDPI AG
2020-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/2/422 |
| _version_ | 1811187043233955840 |
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| author | Wei Wang Xiaoji Li Sujan Rajbhandari Yanlong Li |
| author_facet | Wei Wang Xiaoji Li Sujan Rajbhandari Yanlong Li |
| author_sort | Wei Wang |
| collection | DOAJ |
| description | An important step in the design of receiver aperture and optimal spacing of the diversity scheme for an underwater laser communication system is to accurately characterize the two-dimensional (2D) spatial distribution of laser beam intensity. In this paper, the 2D optical intensity distribution and 3 dB optical intensity spot radius (OISR) are investigated due to the dominating optical intensity of laser beam being within the 3 dB OISR. By utilizing the Henyey−Greenstein function to compute the scattering angles of photons, the effects of the scattering underwater optical channel and optical system parameters on 3 dB OISR are examined based on the Monte Carlo simulation method. We have shown for the first time that in the channel with a high density of scattering particles, the divergence angle of the laser source plays a negligible role in 3 dB OISR. This is an interesting phenomenon and important for optical communication as this clearly shows that the geometric loss is no longer important for the design of receiver aperture and optimal spacing of the diversity scheme for the underwater laser communication system in the highly scattering channel. |
| first_indexed | 2024-04-11T13:56:30Z |
| format | Article |
| id | doaj.art-eb5245b0053d490d9f4b81eeb2e15b4d |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:56:30Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-eb5245b0053d490d9f4b81eeb2e15b4d2022-12-22T04:20:20ZengMDPI AGSensors1424-82202020-01-0120242210.3390/s20020422s20020422Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater ChannelWei Wang0Xiaoji Li1Sujan Rajbhandari2Yanlong Li3Ministry of Education Key Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin 541004, ChinaMinistry of Education Key Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin 541004, ChinaInstitute of Future Transport and Cities, School of Computing, Electronics and Mathematics, Coventry University, Coventry CV15FB, UKMinistry of Education Key Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin 541004, ChinaAn important step in the design of receiver aperture and optimal spacing of the diversity scheme for an underwater laser communication system is to accurately characterize the two-dimensional (2D) spatial distribution of laser beam intensity. In this paper, the 2D optical intensity distribution and 3 dB optical intensity spot radius (OISR) are investigated due to the dominating optical intensity of laser beam being within the 3 dB OISR. By utilizing the Henyey−Greenstein function to compute the scattering angles of photons, the effects of the scattering underwater optical channel and optical system parameters on 3 dB OISR are examined based on the Monte Carlo simulation method. We have shown for the first time that in the channel with a high density of scattering particles, the divergence angle of the laser source plays a negligible role in 3 dB OISR. This is an interesting phenomenon and important for optical communication as this clearly shows that the geometric loss is no longer important for the design of receiver aperture and optimal spacing of the diversity scheme for the underwater laser communication system in the highly scattering channel.https://www.mdpi.com/1424-8220/20/2/4223 db optical intensity spot radiusscattering underwater channelmonte carlo simulation method |
| spellingShingle | Wei Wang Xiaoji Li Sujan Rajbhandari Yanlong Li Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel Sensors 3 db optical intensity spot radius scattering underwater channel monte carlo simulation method |
| title | Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel |
| title_full | Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel |
| title_fullStr | Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel |
| title_full_unstemmed | Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel |
| title_short | Investigation of 3 dB Optical Intensity Spot Radius of Laser Beam under Scattering Underwater Channel |
| title_sort | investigation of 3 db optical intensity spot radius of laser beam under scattering underwater channel |
| topic | 3 db optical intensity spot radius scattering underwater channel monte carlo simulation method |
| url | https://www.mdpi.com/1424-8220/20/2/422 |
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