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Bidirectional ultradense WDM for metro networks adopting the beat-frequency-locking method

2003; Optica Publishing Group; Volume: 2; Issue: 10 Linguagem: Inglês

1536-5379

Sang-Yuep Kim, Jaehoon Lee, Jae‐Seung Lee,

Advanced Photonic Communication Systems

We present a technique to increase the spectral efficiencies of metro networks by using channel-interleaved bidirectional ultradense wavelength-division multiplexing (WDM) within each customer’s optical band. As a demonstration, we transmit 12.5-GHz-spaced 8×10 Gbit/s channels achieving spectral efficiency as high as 0.8 bit/s/Hz with a 25-GHz WDM demultiplexer. The beat-frequency-locking method is used to stabilize the channel frequencies within ±200 MHz, which is far more accurate than with conventional wavelength lockers.