Spectral broadening in tight confinement geometry of a random fiber laser
We present a random Raman fiber laser pumped by a continuous-wave 1480nm source where neither a visible saturable absorber nor a fiber Bragg grating were incorporated. The backward pumping feedback loop allows a single direction of 1584nm wave propagation under tighter confinement of a dispersion co...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier BV
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/108727/1/Spectral%20broadening%20in%20tight%20confinement%20geometry%20of%20a%20random%20fiber%20laser.pdf |
| _version_ | 1825939653911379968 |
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| author | Sarmani, Abdul Rahman Al-Alimi, Abdulmoghni Ali Wazae Yusoff, N. Mohd Mahdi, Mohd Adzir |
| author_facet | Sarmani, Abdul Rahman Al-Alimi, Abdulmoghni Ali Wazae Yusoff, N. Mohd Mahdi, Mohd Adzir |
| author_sort | Sarmani, Abdul Rahman |
| collection | UPM |
| description | We present a random Raman fiber laser pumped by a continuous-wave 1480nm source where neither a visible saturable absorber nor a fiber Bragg grating were incorporated. The backward pumping feedback loop allows a single direction of 1584nm wave propagation under tighter confinement of a dispersion compensating fiber (DCF). This geometry that implies a stronger Kerr-lensing effect supports two types of nonlinear broadening that were achieved in the stable output power generation. The first that agrees well to wave kinetics theory favors 1.76 to 3.53nm spectral progress. Against this flow, another type of wider broadening begun at 4.88nm before reducing gradually to 4.05nm with the increase in pump power. The former corresponds to a maximum of 6.3 times broadening ratio with respect to the pump linewidth. To date, this is the best achievement in the world at just below 1.7 W pump power level especially without utilizing pump-pulse synchronization or any external mode-locking modulations. In contrast without the tighter confinement geometry, the initiation of 4.25nm bandwidth was realized in the unstable power zone. These ascertain the double roles of dispersion compensating fiber as a stabilizing factor as well as for dispersion management. |
| first_indexed | 2024-12-09T02:20:39Z |
| format | Article |
| id | upm.eprints-108727 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-12-09T02:20:39Z |
| publishDate | 2022 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | upm.eprints-1087272024-10-11T08:32:13Z http://psasir.upm.edu.my/id/eprint/108727/ Spectral broadening in tight confinement geometry of a random fiber laser Sarmani, Abdul Rahman Al-Alimi, Abdulmoghni Ali Wazae Yusoff, N. Mohd Mahdi, Mohd Adzir We present a random Raman fiber laser pumped by a continuous-wave 1480nm source where neither a visible saturable absorber nor a fiber Bragg grating were incorporated. The backward pumping feedback loop allows a single direction of 1584nm wave propagation under tighter confinement of a dispersion compensating fiber (DCF). This geometry that implies a stronger Kerr-lensing effect supports two types of nonlinear broadening that were achieved in the stable output power generation. The first that agrees well to wave kinetics theory favors 1.76 to 3.53nm spectral progress. Against this flow, another type of wider broadening begun at 4.88nm before reducing gradually to 4.05nm with the increase in pump power. The former corresponds to a maximum of 6.3 times broadening ratio with respect to the pump linewidth. To date, this is the best achievement in the world at just below 1.7 W pump power level especially without utilizing pump-pulse synchronization or any external mode-locking modulations. In contrast without the tighter confinement geometry, the initiation of 4.25nm bandwidth was realized in the unstable power zone. These ascertain the double roles of dispersion compensating fiber as a stabilizing factor as well as for dispersion management. Elsevier BV 2022 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/108727/1/Spectral%20broadening%20in%20tight%20confinement%20geometry%20of%20a%20random%20fiber%20laser.pdf Sarmani, Abdul Rahman and Al-Alimi, Abdulmoghni Ali Wazae and Yusoff, N. Mohd and Mahdi, Mohd Adzir (2022) Spectral broadening in tight confinement geometry of a random fiber laser. Optical and Quantum Electronics, 55 (8). pp. 1-15. ISSN 0306-8919; ESSN: 1572-817X https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4184332 10.2139/ssrn.4184332 |
| spellingShingle | Sarmani, Abdul Rahman Al-Alimi, Abdulmoghni Ali Wazae Yusoff, N. Mohd Mahdi, Mohd Adzir Spectral broadening in tight confinement geometry of a random fiber laser |
| title | Spectral broadening in tight confinement geometry of a random fiber laser |
| title_full | Spectral broadening in tight confinement geometry of a random fiber laser |
| title_fullStr | Spectral broadening in tight confinement geometry of a random fiber laser |
| title_full_unstemmed | Spectral broadening in tight confinement geometry of a random fiber laser |
| title_short | Spectral broadening in tight confinement geometry of a random fiber laser |
| title_sort | spectral broadening in tight confinement geometry of a random fiber laser |
| url | http://psasir.upm.edu.my/id/eprint/108727/1/Spectral%20broadening%20in%20tight%20confinement%20geometry%20of%20a%20random%20fiber%20laser.pdf |
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