IEICE Transactions on Communications

IEICE Transactions on Communications 2008 E91-B(2):399-408; doi:10.1093/ietcom/e91-b.2.399

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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Fiber-Optic Transmission for Communications

Gbit-Class Transmission Using SOA Data Rewriter for WDM-PON

Satoshi NARIKAWA¹, Hiroaki SANJOH², Naoya SAKURAI¹ and Kiyomi KUMOZAKI¹

¹ The authors are with NTT Access Network Service Systems Laboratories, NTT Corporation, Chiba-shi, 274-0825 Japan. E-mail: narikawa.satoshi{at}ansl.ntt.co.jp, ² The author is with NTT Electronics, Naka-shi, 311-0122 Japan.

We describe the transmission characteristics of a wavelength independent wavelength division multiplexing passive optical network (WDM-PON) based on a wavelength channel data rewriter (WCDR). The WCDR is composed of a linear amplifier (LA) and a saturated semiconductor optical amplifier (SOA), and by using the WCDR in optical network units (ONUs), we can erase the downstream signal and modulate the same wavelength channel with the upstream signal. In this paper, we analyze the data rewriting characteristic, the frequency chirp characteristic and the bit error rate (BER) degradation occasioned by the use of saturated SOAs. Furthermore, we report high-speed transmission with power penalty of less than 1 dB at bit rates of 1.25 Gbit/s, 2.5 Gbit/s and 10 Gbit/s for downstream signals and 1.25 Gbit/s for upstream signals after transmission through 40 km of single-mode fiber.

Key Words: wavelength division multiplexing, passive optical network, semiconductor optical amplifier, gain saturation

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Manuscript received May 11, 2007. Manuscript revised July 17, 2007.

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