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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Keren Bergman
  • Vol. 7, Iss. 7 — Jul. 1, 2008
  • pp: 662–672

Bidirectional reconfigurable optical add-drop multiplexer with power compensation built-in optical amplifiers

Shien-Kuei Liaw, Yao-Sheng Hsieh, Wan-Lin Cheng, Chu-Lin Chang, and Hong-Fu Ting  »View Author Affiliations


Journal of Optical Networking, Vol. 7, Issue 7, pp. 662-672 (2008)
http://dx.doi.org/10.1364/JON.7.000662


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Abstract

A power-compensated bidirectional reconfigurable optical add-drop multiplexer (Bi-ROADM) based on tunable fiber Bragg gratings is proposed and demonstrated. By splicing a fiber Bragg grating (FBG) within a piece of an erbium-doped fiber, a lossless, low-cost, and simply structured Bi-ROADM is obtained. The total pumping power is 40mW with 0.6m of gain fiber for both upstream and downstream signals. The Bi-ROADM performance is evaluated using a bidirectional four-channel 50km lightwave transmission link using a 2.5Gbits/s bit rate per channel. Bit-error-rate (BER) performances show that the power penalties are 0.49 and 0.76dB at a 10−9 BER, respectively, for the 25km dropped channel and the 50km passed-through channel as compared to the back-to-back condition. An extra power penalty of only 0.2dB is observed for bidirectional transmission compared to the unidirectional transmission case. Cross-talk issues and chromatic dispersion are also studied. The induced power penalty by adjacent channel cross talk is negligible (≦0.2dB) with a narrow channel spacing of 1.0nm. The induced power penalty by intraband (homodyne) cross talk is also negligible for the cross-talk level of −30dB, corresponding to 99.9% reflectivity of the FBG. The Bi-ROADM may find important applications in bidirectional WDM networks and/or bidirectional transmission.

© 2008 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.4510) Fiber optics and optical communications : Optical communications
(060.1155) Fiber optics and optical communications : All-optical networks
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Research Papers

History
Original Manuscript: February 29, 2008
Revised Manuscript: May 6, 2008
Manuscript Accepted: May 8, 2008
Published: June 17, 2008

Citation
Shien-Kuei Liaw, Yao-Sheng Hsieh, Wan-Lin Cheng, Chu-Lin Chang, and Hong-Fu Ting, "Bidirectional reconfigurable optical add-drop multiplexer with power compensation built-in optical amplifiers," J. Opt. Netw. 7, 662-672 (2008)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-7-7-662

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