Fanlong Dong, Xinhai Zhang, Feng Song. Thermal expanded core technique applied to high power fiber mode field adapter[J]. Chinese Optics Letters, 2018, 16(3): 030602
- Chinese Optics Letters
- Vol. 16, Issue 3, 030602 (2018)
Fig. 1. Schematic illustration of a thermally expanded core fiber.
Fig. 2. Refractive index profile by the thermal diffusion of the dopant. Initial LMAF’s parameters are a = 7.5 μm, n cl = 1.4495 Δ n = 0.0022
Fig. 3. Enlargement of the LP 01 λ
Fig. 4. MFDs after the TEC treatment versus the NAs of the initial fibers.
Fig. 5. MFD after the TEC treatment versus the core diameter of the initial fibers.
Fig. 6. Distribution of LP 01
Fig. 7. Transmission efficiency of the MFA versus the length of the heating region.
Fig. 8. Micrographs of the TEC fiber cross-section. (a) Initial SMF 6/125; (b) TEC SMF 6/125; (c) initial LMAF 15/130; (d) TEC LMAF 15/130.
Fig. 9. Schematic illustration measuring the performance of the MFA.
Fig. 10. Transmission loss of the MFA with TEC treatment.
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