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All-fiber wavelength-tunable acoustooptic switches based on intermodal coupling in fibers

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4 Author(s)
Hee Su Park ; Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea ; Kwang Yong Song ; Seok Hyun Yun ; Byoung Yoon Kim

In this paper, we demonstrate a novel all-fiber wavelength-tunable acoustooptic switch utilizing intermodal coupling in a two-mode fiber (TMF). Its all-fiber configuration consisting of a fiber acoustooptic tunable filter and a mode-selective coupler results in the low loss (<2 dB) operation. The operating bandwidth >50 nm, the switching time of 40 μsec, and the crosstalk of 20 dB were achieved. By controlling the design parameters of the two-mode fiber, the 3-dB bandwidth of the switched signal was varied from 2.5 nm to >35 nm. A novel all-fiber dynamic optical add-drop multiplexer is also demonstrated using two acoustooptic switches in series.

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Lightwave Technology, Journal of  (Volume:20 ,  Issue: 10 )