Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating
To measure the induced refractive index and reflectivity of fiber Bragg grating, various samples of FBGs with different experimental conditions were fabricated by phase mask technique using KrF excimer laser operating at 248nm. In this study, only two samples are reported here. These samples were wr...
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| Format: | Article |
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National Institute of Research and Development for Optoelectronics
2009
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| _version_ | 1796855263063441408 |
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| author | Ahmed Tahir, Bashir Phing, Ho Sze Ali, Jalil Rahman, R. A. |
| author_facet | Ahmed Tahir, Bashir Phing, Ho Sze Ali, Jalil Rahman, R. A. |
| author_sort | Ahmed Tahir, Bashir |
| collection | ePrints |
| description | To measure the induced refractive index and reflectivity of fiber Bragg grating, various samples of FBGs with different experimental conditions were fabricated by phase mask technique using KrF excimer laser operating at 248nm. In this study, only two samples are reported here. These samples were written by varying the UV exposure time and at constant pulse energy of 70 mJ (sample I) and 30 mJ (sample II) respectively. The induced refractive index and reflectivity of two samples were monitored during the growth of fiber gratings at different value of UV exposure time. The maximum refractive index modulations for sample I & II are 5.109 × 10-5 and 1.77 × 10-4 respectively. The reflectivity for sample I is 69% at Bragg wavelength 1551.3nm and sample II is 54% at Bragg wavelength 1552.2nm. The increasing of reflectivity of fiber grating with more UV exposure time results the more microstructural changes occur within the lattice of the photosensitive core and the more the residual axial stress builds up within the cross section of the fiber. It means that the induced index of modulation was increased with the increasing of UV exposure time. It is also inferred that the reflectivity increases gradually with the rise of UV exposure time and then saturates.
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| first_indexed | 2024-03-05T18:26:03Z |
| format | Article |
| id | utm.eprints-13560 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:26:03Z |
| publishDate | 2009 |
| publisher | National Institute of Research and Development for Optoelectronics |
| record_format | dspace |
| spelling | utm.eprints-135602011-08-22T03:35:19Z http://eprints.utm.my/13560/ Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating Ahmed Tahir, Bashir Phing, Ho Sze Ali, Jalil Rahman, R. A. QC Physics TK Electrical engineering. Electronics Nuclear engineering To measure the induced refractive index and reflectivity of fiber Bragg grating, various samples of FBGs with different experimental conditions were fabricated by phase mask technique using KrF excimer laser operating at 248nm. In this study, only two samples are reported here. These samples were written by varying the UV exposure time and at constant pulse energy of 70 mJ (sample I) and 30 mJ (sample II) respectively. The induced refractive index and reflectivity of two samples were monitored during the growth of fiber gratings at different value of UV exposure time. The maximum refractive index modulations for sample I & II are 5.109 × 10-5 and 1.77 × 10-4 respectively. The reflectivity for sample I is 69% at Bragg wavelength 1551.3nm and sample II is 54% at Bragg wavelength 1552.2nm. The increasing of reflectivity of fiber grating with more UV exposure time results the more microstructural changes occur within the lattice of the photosensitive core and the more the residual axial stress builds up within the cross section of the fiber. It means that the induced index of modulation was increased with the increasing of UV exposure time. It is also inferred that the reflectivity increases gradually with the rise of UV exposure time and then saturates. National Institute of Research and Development for Optoelectronics 2009-06 Article PeerReviewed Ahmed Tahir, Bashir and Phing, Ho Sze and Ali, Jalil and Rahman, R. A. (2009) Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating. Journal of Optoelectronics and Advanced Materials , 11 (6). pp. 773-776. ISSN 1454-4164 |
| spellingShingle | QC Physics TK Electrical engineering. Electronics Nuclear engineering Ahmed Tahir, Bashir Phing, Ho Sze Ali, Jalil Rahman, R. A. Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating |
| title | Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating |
| title_full | Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating |
| title_fullStr | Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating |
| title_full_unstemmed | Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating |
| title_short | Effect of irradiation time on refractive index and reflectivity during growth of fiber Bragg grating |
| title_sort | effect of irradiation time on refractive index and reflectivity during growth of fiber bragg grating |
| topic | QC Physics TK Electrical engineering. Electronics Nuclear engineering |
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