Pham, X. and Si, J. and Chen, T. and Niu, Z. and Hou, X. (2020) Ultra-high-temperature resistant distributed Bragg reflector fiber laser based on type II-IR fiber Bragg gratings. Applied Optics, 59 (10). pp. 3081-3085. ISSN 1559128X
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We demonstrate a distributed Bragg reflector fiber laser that is capable of long-term operation at ultra-high temperatures. To form the laser cavity, a piece of Er-doped fiber is fusion spliced to a pair of type II-IR gratings, which are written using a femtosecond laser with a phase mask. Saturated gratings with different reflectivities are fabricated by varying the position of the grating region relative to the fiber core center. An eccentric grating with a relatively low reflectivity is chosen as the laser output coupler, while a regular grating with a higher reflectivity is used as the laser’s high-reflection reflector. After an annealing process, the laser performance is tested at high temperatures. The results show that the laser can operate with a stable output wavelength and no output power degradation at high temperatures up to 1000◦C. © 2020 Optical Society of America.
Item Type: | Article |
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Divisions: | Faculties > Faculty of Control Engineering |
Identification Number: | 10.1364/AO.389871 |
Uncontrolled Keywords: | Distributed Bragg reflectors; Fiber Bragg gratings; Fiber lasers; Fibers; Reflection; Annealing process; Er-doped fibers; High temperature; Laser performance; Output power degradation; Output wavelengths; Regular gratings; Ultrahigh temperature; DBR lasers |
Additional Information: | Language of original document: English. |
URI: | http://eprints.lqdtu.edu.vn/id/eprint/9034 |