Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications
Beam wander and spatial noise that are modulated on optical propagation produce noise modulation in the signal spectral before being received by a Photodetector (PD). In order to suppress noise modulation in the signal spectral, we present an Optical Spatial Filter (OSF) method that is composed...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2015-10-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | http://ijtech.eng.ui.ac.id/article/view/1421 |
| _version_ | 1797972772061708288 |
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| author | Ucuk Darusalam Purnomo Sidi Priambodo Eko Tjipto Rahardjo |
| author_facet | Ucuk Darusalam Purnomo Sidi Priambodo Eko Tjipto Rahardjo |
| author_sort | Ucuk Darusalam |
| collection | DOAJ |
| description | Beam
wander and spatial noise that are modulated on optical propagation produce
noise modulation in the signal spectral before being received by a
Photodetector (PD). In order to suppress noise modulation in the signal
spectral, we present an Optical Spatial Filter (OSF) method that is composed of
the cone reflector and a pinhole as a detection method. A cone reflector is
designed to suppress beam wander in order to minimize temporal noise that
fluctuates randomly and governs reflection of the deflected focus spot into the
narrow region of pinhole. The pinhole
governs the Fresnel diffraction in order to suppress spatial noise in the
center of focus spot that undergoes fluctuation and random frequencies as well.
Through simultaneous suppression in temporal noise caused by beam wander and
spatial noise using the OSF method, noise modulation in the signal spectral can
be minimized optimally. We compared the OSF with the Direct-Detection (DD)
method by experimentation. The results of the experiment show significant
improvements for noise suppression in the signal spectral. The average values of the
Signal-to-Noise Ratio (SNR) increase, namely, 37.5 dB, 38.5 dB, 38.7 dB and
39.2 dB for pinhole diameters of 50 µm, 40 µm, 30 µm, and 20 µm,
respectively. |
| first_indexed | 2024-04-11T03:53:43Z |
| format | Article |
| id | doaj.art-0c01b57146574238b16f350b1929b745 |
| institution | Directory Open Access Journal |
| issn | 2086-9614 2087-2100 |
| language | English |
| last_indexed | 2024-04-11T03:53:43Z |
| publishDate | 2015-10-01 |
| publisher | Universitas Indonesia |
| record_format | Article |
| series | International Journal of Technology |
| spelling | doaj.art-0c01b57146574238b16f350b1929b7452023-01-02T01:02:21ZengUniversitas IndonesiaInternational Journal of Technology2086-96142087-21002015-10-016463163910.14716/ijtech.v6i4.14211421Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) CommunicationsUcuk Darusalam0Purnomo Sidi Priambodo1Eko Tjipto Rahardjo2Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, IndonesiaDepartment of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, IndonesiaDepartment of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, IndonesiaBeam wander and spatial noise that are modulated on optical propagation produce noise modulation in the signal spectral before being received by a Photodetector (PD). In order to suppress noise modulation in the signal spectral, we present an Optical Spatial Filter (OSF) method that is composed of the cone reflector and a pinhole as a detection method. A cone reflector is designed to suppress beam wander in order to minimize temporal noise that fluctuates randomly and governs reflection of the deflected focus spot into the narrow region of pinhole. The pinhole governs the Fresnel diffraction in order to suppress spatial noise in the center of focus spot that undergoes fluctuation and random frequencies as well. Through simultaneous suppression in temporal noise caused by beam wander and spatial noise using the OSF method, noise modulation in the signal spectral can be minimized optimally. We compared the OSF with the Direct-Detection (DD) method by experimentation. The results of the experiment show significant improvements for noise suppression in the signal spectral. The average values of the Signal-to-Noise Ratio (SNR) increase, namely, 37.5 dB, 38.5 dB, 38.7 dB and 39.2 dB for pinhole diameters of 50 µm, 40 µm, 30 µm, and 20 µm, respectively.http://ijtech.eng.ui.ac.id/article/view/1421Beam wander, Cone reflector, FSO, Pinhole, Optical Spatial Filter, Spatial noise |
| spellingShingle | Ucuk Darusalam Purnomo Sidi Priambodo Eko Tjipto Rahardjo Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications International Journal of Technology Beam wander, Cone reflector, FSO, Pinhole, Optical Spatial Filter, Spatial noise |
| title | Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications |
| title_full | Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications |
| title_fullStr | Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications |
| title_full_unstemmed | Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications |
| title_short | Noise Suppression in the Signal Spectral Induced by Atmospheric Turbulence on the FSO (Free-Space Optical) Communications |
| title_sort | noise suppression in the signal spectral induced by atmospheric turbulence on the fso free space optical communications |
| topic | Beam wander, Cone reflector, FSO, Pinhole, Optical Spatial Filter, Spatial noise |
| url | http://ijtech.eng.ui.ac.id/article/view/1421 |
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