Wavelength-tunable L-band mode-locked fiber laser using a long-period fiber grating

Junjie Jiang, Qianqian Huang, Yuehui Ma, Dandan Liao, Zinan Huang, Lilong Dai, Yunqi Liu, Chengbo Mou*, Mohammed Al Araimi, Alex Rozhin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We demonstrate an L-band wavelength-tunable passively mode-locked fiber laser using a single long-period fiber grating (LPFG) as a narrow-band optical attenuator (NBOA). Through bending the LPFG, the central wavelength can be continuously tuned from 1582.02 to 1597.29 nm, while the output power only varies from 1.465 to 1.057 mW, approximately a rate of 22 µW/nm variation. This is the first time that LPFG is functioned as a NBOA in mode-locked fiber lasers, showing the great advantage of less impact on output power variation reduction. Besides, the total cavity length is 5.08 m, which is the shortest length yet reported in wavelength-tunable mode-locked fiber lasers. The wavelength tuning could also be realized at harmonic mode locking with tuning range of 14.69 nm under 5th harmonic.
Original languageEnglish
Pages (from-to)26332-26339
JournalOptics Express
Issue number17
Early online date2 Aug 2021
Publication statusPublished - 16 Aug 2021

Bibliographical note

© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Funding: National Key Research and Development Program of China (2020YFB1805800); National Natural Science Foundation of China (61605107, 61975107); Overseas Expertise Introduction Project for Discipline Innovation (D20031); Natural Science Foundation of Shanghai (20ZR1471500).


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