Single-wavelength-pump bi-directional hybrid fiber amplifier for bi-directional local area network application |
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Authors: | Mars Ning Guo Shien-Kuei Liaw Nan-Kuang Chen Chinlon Lin |
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Affiliation: | a Network Technology Research Center (NTRC), Nanyang Technological University, Singapore 637553b Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwanc Department of Photonics, National United University, Miaoli 370, Taiwan |
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Abstract: | This paper proposes a novel bi-directional hybrid fiber amplifier using a single-wavelength pump laser diode (LD) at 1495 nm. The hybrid amplifier is theoretically applied in a 50 km bi-directional local area network (LAN) with 26 ch × 10 Gb/s for bi-directional transmission. Thirteen C-band channels serve as downlink signals while the other 13 L-band channels are employed as uplink signals. Without loss of generality, four channels (two from each band) are experimentally analyzed. Erbium doped fiber (EDF) provides amplification for the C-band channels and Raman amplification amplifies the L-band channels. The pump efficiency is improved by employing a double-pass scheme for both the Erbium doped fiber amplifier (EDFA) and Raman fiber amplifier (RFA). The chromatic dispersion incurred by all the channels is precisely compensated for by inserting a fiber Bragg grating (FBG) array in appropriate locations along the dispersion compensating fiber (DCF) segments. Moreover, gain equalization of all the channels is achieved by adjusting the FBG reflectivity. Both the simulation results and experimental measurements confirm the proposed device feasibility and potential application in a bi-directional LAN. |
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Keywords: | Hybrid fiber amplifier Fiber Bragg grating Dispersion compensation Gain equalization Bi-directional transmission Local area network |
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