• Title : Bidirectional Transmission of Downstream Broadcast and Upstream Baseband Signals over a Single Wavelength in WDM-PON Using Mutually Injected FPLDs and RSOA
• Author : H.-C. Ji, I. Yamashita, and K.Kitayama
• Journal : IEEE Photonics Technology Letters, Vol.20, Issue 20, pp.1709 - 1711, 2008
• Abstract : We propose and demonstrate a cost-effective wavelength-division-multiplexed passive optical network which can provide an 122-Mb/s upstream baseband and the downstream broadcast signals simultaneously over a single wavelength using light-injected optical sources. The broadband light source for the upstream is implemented using mutually injected Fabry-Perot laser diodes (MI-FPLD) at the central office and the reflective semiconductor optical amplifier is used for the upstream modulation at each optical network unit. For cost-effectiveness, the broadcast signals are directly applied to MI-FPLD. one of the FPLDs in MI-FPLD is directly modulated with the broadcast signals. The transmission results show that the error-free operation for the upstream data and the high-quality broadcast signals with 5-dB carrier-to-noise ratio margin can be obtained despite of the detrimental effects of periodic noise peaks of MI-FPLD.

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