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Fused bitapered single-mode fiber directional coupler for core and cladding mode coupling

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3 Author(s)
Lee, Sang Hoon ; Dept. of Phys., Korea Adv. Inst. of Sci. & Techonolgy, Daejeon, South Korea ; Kwang Yong Song ; Byoung Yoon Kim

We demonstrate a new functional fiber component providing coupling between the LP1m cladding (LP1mcl) mode in one single-mode fiber (SMF) and the LP01 core mode in another SMF. The phase-matching condition in the coupling region is achieved by prepulling the fiber sections. The experimentally demonstrated coupling efficiency between the LP01 core and the LP13cl modes is more than 60% over 70-nm wavelength range with less than 3% variation over 90°C temperature range.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 12 )