Jianfei Xing, Jianxiang Wen, Jie Wang, Fufei Pang, Zhenyi Chen, Yunqi Liu, Tingyun Wang, "All-fiber linear polarization and orbital angular momentum modes amplifier based on few-mode erbium-doped fiber and long period fiber grating," Chin. Opt. Lett. 16, 100604 (2018)
- Chinese Optics Letters
- Vol. 16, Issue 10, 100604 (2018)
Fig. 1. Refractive index distribution and cross-section of the FM-EDF.
Fig. 2. Absorption spectra of the FM-EDF and EDF (EDFC-980HP).
Fig. 3. Different modes beam in an FM-EDF: (a) LP 01 LP 11 LP 21
Fig. 4. Schematic diagram of the all-fiber LP mode amplification system.
Fig. 5. On-off gain spectra of the FM-EDF with different pump powers.
Fig. 6. Schematic diagram of an all-fiber OAM amplification system.
Fig. 7. Variation of the first-order OAM transverse mode field intensity with different pump powers.
Fig. 8. Relationship between the transverse mode field intensity of the first-order OAM and pump power.
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