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Optical Fiber Technology

Group velocity manipulation using cross gain modulation in erbium-doped fibers with co-direction structure

Fangying Tao, Li Zhan, Kai Qian, Zhiqiang Wang, Liang Zhang, Le He

Published Jan 13, 2017• 2 citations
Publisher
DOI
10.1016/j.yofte.2016.12.007

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We report the group velocity control of light in optical fiber by gain-imbedded unbalanced fiber Mach–Zehnder interferometer. Slow and fast light effects were observed at the frequencies near the minimum of the transmission spectrum. Controllable group velocity between 0.719 c to 0.620 c ( c is the light speed in a vacuum) was obtained via the cross-intensity modulation effect, by changing the gain index in the long arm. With the power compensation provided by the introduced Erbium doped fiber, this proposal offers a simple and operable solution to realize lossless slow and fast light propagation in optical fiber.