Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser
We demonstrate the modulation of laser bandwidth by utilizing an ultranarrow tunable bandpass filter in a passively Q-switched erbium-doped fiber laser. The passive Q-switch mechanism is enabled by using carbon nanotubes as saturable absorber at a Q-switched threshold of 35.5 mW. Based on spectral f...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Institute of Physics
2024
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| Online Access: | http://psasir.upm.edu.my/id/eprint/113323/ http://psasir.upm.edu.my/id/eprint/113323/1/113323.pdf |
| _version_ | 1848867732148191232 |
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| author | Muhammad, Farah Diana Hamdan, Khalilah Zatiliman |
| author_facet | Muhammad, Farah Diana Hamdan, Khalilah Zatiliman |
| author_sort | Muhammad, Farah Diana |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | We demonstrate the modulation of laser bandwidth by utilizing an ultranarrow tunable bandpass filter in a passively Q-switched erbium-doped fiber laser. The passive Q-switch mechanism is enabled by using carbon nanotubes as saturable absorber at a Q-switched threshold of 35.5 mW. Based on spectral filtering effect introduced by the ultranarrow tunable bandpass filter, the 3dB laser bandwidth can be tuned from 0.016 nm to 0.478 nm at a fixed pump power of 75.9 mW. The corresponding pulse behavior for each different bandwidth is characterized, and the results reveals that the pulse width can be as well tuned from 7.8 to 2.6 μs against the laser bandwidth, which agrees with the rule of time-bandwidth product (TBP). Correspondingly, the pulse repetition rate and the pulse energy vary from 16.23 kHz to 26.16 kHz and from 0.67 to 1.03 μJ respectively across the laser bandwidth. Further investigation of the pulse performance is performed against the pump power increment up to 107.2 mW. To the best of our knowledge, this is the first demonstration of spectrum bandwidth modulation in a passively Q-switched fiber laser, which can be useful for fully exploiting the possibilities of Q-switched pulse applications |
| first_indexed | 2025-11-15T14:16:41Z |
| format | Article |
| id | upm-113323 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:41:10Z |
| publishDate | 2024 |
| publisher | Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1133232025-10-27T00:54:54Z http://psasir.upm.edu.my/id/eprint/113323/ Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser Muhammad, Farah Diana Hamdan, Khalilah Zatiliman We demonstrate the modulation of laser bandwidth by utilizing an ultranarrow tunable bandpass filter in a passively Q-switched erbium-doped fiber laser. The passive Q-switch mechanism is enabled by using carbon nanotubes as saturable absorber at a Q-switched threshold of 35.5 mW. Based on spectral filtering effect introduced by the ultranarrow tunable bandpass filter, the 3dB laser bandwidth can be tuned from 0.016 nm to 0.478 nm at a fixed pump power of 75.9 mW. The corresponding pulse behavior for each different bandwidth is characterized, and the results reveals that the pulse width can be as well tuned from 7.8 to 2.6 μs against the laser bandwidth, which agrees with the rule of time-bandwidth product (TBP). Correspondingly, the pulse repetition rate and the pulse energy vary from 16.23 kHz to 26.16 kHz and from 0.67 to 1.03 μJ respectively across the laser bandwidth. Further investigation of the pulse performance is performed against the pump power increment up to 107.2 mW. To the best of our knowledge, this is the first demonstration of spectrum bandwidth modulation in a passively Q-switched fiber laser, which can be useful for fully exploiting the possibilities of Q-switched pulse applications Institute of Physics 2024-08-22 Article PeerReviewed text en cc_by_nc_nd_4 http://psasir.upm.edu.my/id/eprint/113323/1/113323.pdf Muhammad, Farah Diana and Hamdan, Khalilah Zatiliman (2024) Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser. Laser Physics, 34 (10). art. no. 105101. pp. 1-14. ISSN 1054-660X; eISSN: 1555-6611 https://iopscience.iop.org/article/10.1088/1555-6611/ad6d51 10.1088/1555-6611/ad6d51 |
| spellingShingle | Muhammad, Farah Diana Hamdan, Khalilah Zatiliman Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser |
| title | Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser |
| title_full | Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser |
| title_fullStr | Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser |
| title_full_unstemmed | Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser |
| title_short | Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser |
| title_sort | bandwidth modulation and pulse characterization of passively q-switched erbium-doped fiber laser |
| url | http://psasir.upm.edu.my/id/eprint/113323/ http://psasir.upm.edu.my/id/eprint/113323/ http://psasir.upm.edu.my/id/eprint/113323/ http://psasir.upm.edu.my/id/eprint/113323/1/113323.pdf |