Thermal expanded core technique applied to high power fiber mode field adapter

Fanlong Dong; Xinhai Zhang; Feng Song

doi:10.3788/COL201816.030602

Journals >Chinese Optics Letters >Volume 16 >Issue 3 >Page 030602 > Article

Chinese Optics Letters
Vol. 16, Issue 3, 030602 (2018)

Thermal expanded core technique applied to high power fiber mode field adapter

Fanlong Dong¹, Xinhai Zhang^1、*, and Feng Song²

Author Affiliations

¹Department of Electronics and Electrical Engineering, Southern University of Science and Technology, Shenzhen 518055, China

²Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin 300457, China

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DOI: 10.3788/COL201816.030602 Cite this Article Set citation alerts

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 Copy Citation Text

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Abstract

A mode field adapter (MFA) fabricated by the thermal expanded core (TEC) technique is investigated. Firstly, the mode field characteristics of the TEC large mode area fiber (LMAF) are analyzed. Compared with the single-mode fiber (SMF), the mode field diameter of the LMAF enlarged slower than that of the SMF. Secondly, the mode field characteristics of the different fibers with TEC treatment are discussed. Thirdly, the transmission efficiency of the MFA fabricated by the SMF and LMAF is also investigated. Finally, we used the 6/125 μm SMF and 15/130 μm LMAF to fabricate an MFA with transmission efficiency of 92% and the handling power as high as 100 W.

n^{2} (r) = n_{cl}^{2} + (n_{co}^{2} - n_{cl}^{2}) u (r, t) .

(1)

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D \frac{\partial^{2} u}{\partial r^{2}} + \frac{D}{r} \frac{\partial u}{\partial r} = \frac{\partial u}{\partial t},

(2)

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D = D_{0} \exp (- \frac{Q}{R T}),

(3)

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u (r, t) = \frac{a^{2}}{A^{2}} \exp (- \frac{r^{2}}{A^{2}}),

(4)

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n^{2} (r, t) = n_{cl}^{2} + (n_{co}^{2} - n_{cl}^{2}) \frac{a^{2}}{A^{2}} \exp (- \frac{r^{2}}{A^{2}}) .

(5)

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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

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