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A bidirectional optical add-drop multiplexer with gain using multiport circulators, fiber Bragg gratings, and a single unidirectional optical amplifier

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3 Author(s)
An Vu Tran ; Dept. of Electr. & Electron. Eng., Univ. of Melbourne, Vic., Australia ; Chang-Joon Chae ; Tucker, RodneyS.

We propose and demonstrate a new bidirectional optical add-drop multiplexer (BOADM) with gain based on multiport optical circulators and fiber Bragg gratings. The BOADM incorporates a single unidirectional optical amplifier and can flexibly accommodate asymmetric traffic. The device achieves more than 13 dB of bidirectional gain and has low in-band crosstalk (below -45 dB) and low out-of-band crosstalk (below -30 dB). Moreover, the device removes Rayleigh backscattered light and out-of-band amplified spontaneous emission noise. The power penalty is negligible for all through and add-drop channels in both directions when the BOADM is used in a 6 /spl times/ 10 Gb/s bidirectional wavelength-division-multiplexing transmission system over 80 km of standard single-mode fiber.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 7 )